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RELEASE OF 'BENÍQUEZ' WHITE BEAN (PHASEOLUS VULGARIS L.) CULTIVAR

A total of six field experiments were conducted in southwestern Ontario over a 3-yr period (2016, 2017, 2018) to evaluate the efficacy of trifluralin and halosulfuron applied preplant incorporated (PPI) for weed management in white bean. Trifluralin, halosulfuron, and trifluralin + halosulfuron applied PPI caused as much as 2%, 6%, and 8% white bean injury, respectively. Weed interference delayed maturity and reduced white bean yield 56% compared with the weed-free control. Weed interference with trifluralin and halosulfuron applied alone reduced white bean seed yield as much as 35% and 29%, respectively; however, white bean seed yield with the trifluralin + halosulfuron tankmixes was similar to the weed-free control. Trifluralin, halosulfuron, and trifluralin + halosulfuron applied PPI provided 6%–12%, 75%–92%, and 71%–95% control of velvetleaf; 89%–95%, 93%–98%, and 96%–99% control of pigweed species; 5%–18%, 82%–96%, and 90%–97% control of common ragweed; 90%–97%, 81%–97%, and 95%–99% control of common lambsquarters; 23%–43%, 55%–88%, and 83%–96% control of flower-of-an-hour; 4%–25%, 94%–100%, and 95%–100% control of wild mustard; 96%–100%, 18%–45%, and 97%–100% control of barnyardgrass; and 92%–98%, 21%–40%, and 93%–98% control of green foxtail, respectively. Results indicated that low rates of trifluralin tank-mixed with halosulfuron has the potential to control problematic weeds and improve white bean yields in Ontario.

White bean is one of the mayor legumes, which covers a wide surface in planting structure. High yields are closely related to the right regionalization of this crop and the implementation of agrotechnical provisions. One of the most important agrotechnical issue is: to determine the optimal number of plants in regard to the distance between rows and the distance of plants in a row. Depending on the morphological differences of beans, the number of plants per unit of surface should change. In order to determine this optimal number, it is necessary to experiment different plant varieties with an average number of 250-400 thousand plants / ha. The study was carried out by experimenting two autochthonous varieties Eҫmeniku and Trenare (they were evaluated as the best varieties in Korça District among 5 experimented varieties.) The study aims to identify the influence of the plant number and planting method on the production results. For this purpose, we studied the varieties with a distance of 5-12 cm between plants in a row (distance between rows 60 cm), with a number of about 50,000 plants per hectare. We used two planting methods, that of individual planting of beans and the bouquet planting where the beans are placed 2 by 2. We draw respective conclusions based on experimental results calculated according to the three-factorial statistical analysis.

Six field experiments were conducted during 2015 to 2017 in Ontario, Canada, to determine the efficacy of pethoxamid applied alone, and in combination with broadleaf herbicides, for the control of annual grass and broadleaved weeds in white navy bean. Visible injury was generally minimal (0 to 8%) with herbicide treatments evaluated. Weed control was variable depending on the weed species evaluated. Pethoxamid,S-metolachlor, halosulfuron, imazethapyr, sulfentrazone, pethoxamid + halosulfuron, pethoxamid + imazethapyr, and pethoxamid + sulfentrazone controlled redroot pigweed 82 to 98%; common ragweed 19 to 93%; common lambsquarters 49 to 84%; and green foxtail 47 to 92% in white bean. Weed biomass and weed density reductions were similar to visible control ratings for herbicides evaluated. Weed interference delayed white bean maturity and reduced yield by 50% in this study. Weed interference in plots sprayed with pethoxamid,S-metolachlor, and sulfentrazone reduced white bean yield 36%. White bean yield was similar to the weed-free with other herbicides evaluated. This study concludes that there is potential for the tank-mix of pethoxamid with halosulfuron, imazethapyr, or sulfentrazone for weed control in white bean production.

Soil-applied broadleaf herbicides for weed management in dry beans (Phaseolus vulgaris L.) in Ontario are limited. Sulfentrazone is an effective broadleaf herbicide with some grass activity and is ...

Halosulfuron was recently registered as the second soil-applied herbicide for broadleaf weed control in Ontario dry beans, but does not provide an alternative mode of action. Sulfentrazone is used to control broadleaf weeds in soybean and other pulse crops, and its registration for Ontario dry beans would provide a different mode of action for broadleaf weed control. Five field studies were conducted over two years (2014, 2015) to determine if the spectrum of broadleaf weed control is improved by adding a half-rate of halosulfuron to sulfentrazone PRE, and to determine the tolerance of white bean to sulfentrazone (140 or 210 g ai ha-1), s-metolachlor (1050 g ai ha-1), and halosulfuron (17.5 g ai ha-1) applied alone and in combination. Crop injury was assessed at 2 and 4 weeks after crop emergence. Weed control was assessed at 4 and 8 weeks after herbicide application (WAA), and weed density and biomass were determined at 8 WAA. Seed moisture and yield were determined at harvest. Halosulfuron added to sulfentrazone improved the control of Ambrosia artemisiifolia and Sinapis arvensis. Sulfentrazone + s-metolachlor + halosulfuron caused up to 23% crop injury. Therefore, this study concludes that sulfentrazone + s-metolachlor + halosulfuron provides broad spectrum weed control, but is too injurious to white bean for registration in Ontario.

The potential indirect effects of soil applied herbicides have not been adequately explored. The objective of this study was to explore the potential and relative importance of the indirect effects of halosulfuron applied preplant incorporated (PPI) on several weed species common in white bean fields in Ontario. Halosulfuron applied PPI at 35 g ai ha-1 delayed common lambsquarters and wild mustard emergence and reduced their densities over 70%. It did not delay green foxtail emergence, but the density was decreased over 30%. Indirect herbicidal effects such as delayed emergence timing may be important for weed management in non-competitive crops such as white bean. Based on these results, the indirect effects of soil applied herbicides are real and are potentially important for providing additional prevention of yield loss in field crops. This may be particularly important for relatively non-competitive crops such as white bean and for reducing weed seed return to the seedbank.

Six field experiments were conducted over a two-year period (2013 and 2014) to evaluate the tolerance of white bean and spectrum of weeds controlled with halosulfuron applied preplant incorporated (PPI) alone or tankmixed with trifluralin, pendimethalin, EPTC, dimethenamid-P, or S-metolachlor. Halosulfuron applied alone or in tankmix with trifluralin, pendimethalin, EPTC, dimethenamid-P, or S-metolachlor caused 2% or less visible injury 1 and 4 weeks after emergence (WAE). Halosulfuron applied PPI controlled common lamb's-quarters, wild mustard, redroot pigweed, and common ragweed greater than 90% and green foxtail less than 60% 4 and 8 WAE. Weed biomass and density followed a similar pattern. White bean yield with halosulfuron applied alone or in tankmix with the same herbicides was equivalent to the weed-free control.

Only one herbicide mode of action (ALS inhibitor) is currently available to Ontario dry bean producers for soil-applied broadleaf weed control. Four field studies were conducted over two years (2014, 2015) to examine the tolerance of four market classes of dry beans to sulfentrazone (210 and 420 g·ai·ha-1) and pyroxasulfone (100 and 200 g·ai·ha-1) applied alone and in combination. The registration of these two herbicides would provide Ontario dry bean producers with two additional modes of action for broadleaf weed control. Pyroxasulfone caused up to 23%, 6%, 7% and 10% injury in adzuki, kidney, small red Mexican and white bean, respectively; sulfentrazone caused up to 51%, 12%, 15% and 44% injury and the combination caused up to 90%, 23%, 29% and 62% injury, respectively. Kidney and small red Mexican bean density, height, seed moisture content and yield were not affected. Pyroxasulfone (200 g·ai·ha-1) + sulfentrazone (420 g·ai·ha-1) reduced adzuki and white bean density, shoot dry weight, height and yield. This study concludes that pyroxasulfone (100 g·ai·ha-1) + sulfentrazone (210 g·ai·ha-1) applied PRE can be safely used to control weeds in Ontario kidney and small red Mexican bean production.

Nine field trials (five with PPI and four with PRE herbicides) were conducted at Exeter and Ridgetown, Ontario during 2013 to 2015 to determine if the tolerance of white bean to preplant incorporated (PPI) and preemergence (PRE) herbicides is influenced by the herbicide carrier (water vs. UAN at 200 L&#8226ha-1). There was no significant interaction between the carrier and herbicide for visible injury, plant stand, plant height, shoot dry weight, seed moisture content and yield. There was also no significant difference between the herbicide carriers for all parameters measured except for the shoot dry weight which was 6.5% greater when UAN was used as the carrier with PPI herbicides. Dimethenamid-p, pendimethalin, imazethapyr and halosulfuron applied PPI or PRE caused no visible injury except for imazethapyr PPI which caused 2% visible injury and dimethenamid-p PRE which caused 7% - 14% injury in white bean. There was no effect of the PPI and PRE herbicides evaluated on white bean stand, shoot dry weight, height, maturity and yield. Based on these results, using water or UAN could be used as the carrier for PPI and PRE herbicides in white bean.

Ontario dry bean growers are currently limited to ALS inhibitor herbicides for soilapplied broadleaf weed control; therefore another mode of action is needed. Sulfentrazone is a PPO inhibitor herbicide that has activity on some annual grass and broadleaf weed species. Four field trials were conducted over two years (2014, 2015) to determine the tolerance of four commonly grown dry bean market classes (adzuki, kidney, small red Mexican and white bean) to PRE applications of sulfentrazone at 140, 210, 280 and 420 g·ai·ha-1. Crop injury, plant height, plant density, shoot biomass, seed moisture content and yield were examined. Sulfentrazone (420 g·ai·ha-1) caused up to 74%, 22%, 30%, and 57% injury in adzuki, kidney, small red Mexican and white bean, respectively. Plant density, height and yield were not reduced for kidney or small red Mexican bean. Sulfentrazone (420 g·ai·ha-1) reduced white bean plant density, height and yield by 28%, 29% and 29%, respectively; and reduced adzuki bean plant density, height and yield by 51%, 34% and 57%, respectively. Overall, kidney and small red Mexican bean were the most tolerant to sulfentrazone, followed by white bean, and then adzuki. This study determined sulfentrazone applied PRE is safe for Ontario kidney bean and small red Mexican bean crops.

Pethoxamid has not been evaluated for use in dry bean in Ontario. Seven field experiments were established at three Ontario locations to evaluate the effect of pethoxamid applied preplant incorporated (PPI) and preemergence (PRE) at 1200 and 2400 g a.i. ha−1 in dry bean. At 2 wk after emergence, pethoxamid caused as much as 19%, 4%, 4%, and 6% injury when applied at 1200 g a.i. ha−1 and 32%, 6%, 9%, and 10% injury when applied at 2400 g a.i. ha−1 in adzuki, kidney, small red Mexican, and white bean, respectively. There was no difference in plant stand of dry beans with pethoxamid applied PPI and PRE at 1200 or 2400 g a.i. ha−1. Pethoxamid applied PPI reduced shoot dry weight 15% compared with when applied PRE. Pethoxamid applied at 2400 g a.i. ha−1 also reduced shoot dry weight 12% compared with when applied at 1200 g a.i. ha−1. There was no difference in the seed yield of adzuki, kidney, small red Mexican, and white bean with pethoxamid applied PPI or PRE at 1200 or 2400 g a.i. ha−1. Based on this study,...

White bean is a high-value, important export field crop for farmers in Canada. Effective weed management in white bean is important as this crop is not competitive with weeds. Use of preplant incorporated, preemergence, and postemergence herbicides are effective means for weed control in white bean production in Canada. There are a range of herbicides registered for use on white bean in Canada, but in comparison with other high-acreage field crops such as corn and soybean, the options are relatively limited. This can pose challenges for white bean producers trying to use multiple herbicide modes of action to reduce the evolution of herbicide-resistant weeds and limits management options for troublesome weeds. In particular, management of perennial weeds in white bean with currently registered herbicides is difficult. There is a continued need to evaluate and register additional herbicide options for weed management in white bean in Canada.

Four field trials were conducted over a three-year period (2011-2013) at various locations in Ontario to evaluate the level of weed control provided by halosulfuron applied PPI,PREor POST at 17.5, 35 and 70 g&middotai&middotha-1 in white bean. Halosulfuron applied PPI or PRE at 17.5, 35 and 35 g&middotai&middotha-1 caused 2% or less visible injury 1 and 4 WAA in white bean. However, halosulfuron applied POST at 17.5, 35 and 70 g&middotai&middotha-1 caused 2% - 8% and 1% - 3% white bean injury at 1 and 4 WAA, respectively. There was no decrease in white bean seed yield relative to the weed free check due to weed interference with halosulfuron applied PPI or PRE at doses evaluated, except when applied PRE at 17.5 g&middotai&middotha-1 which resulted in a decrease in seed yield of 25%. Weed interference caused a decrease in white bean yield of 47%, 42% and 44%, when halosulfuron was applied POST at 17.5, 35 and 70 g&middotai&middotha-1, respectively. Halosulfuron applied PPI, PRE and POST controlled AMARE 92% - 100%, 85% - 99% and 47% - 75%; CHEAL 95% - 100%, 83% - 99% and 36% - 51%; and SINAR 97% - 100%, 99% - 100% and 100%, respectively. Halosulfuron applied PPI and PRE reduced AMARE density 93% - 97% and 75% - 95%; CHEAL density 89% - 98% and 81% - 93%; and SINAR density 99% - 100% and 99% - 100%, respectively. Halosulfuron applied PPI and PRE reduced dry weight of AMARE 96% - 98% and 86% - 96%; CHEAL 96% - 98% and 87% - 93%; and SINAR 100% and 100%, respectively. Halosulfuron applied POST at rates evaluated reduced SINAR density and dry weight 100% but caused no significant reduction in AMARE and CHEAL density or dry weight compared to the weedy check. Based on these results, halosulfuron applied PPI orPREat 35 g&middotai&middotha-1 can be used safely for the control of selected broadleaf weeds in white bean production.

Soltani, N., Blackshaw, R. E., Gulden, R.H., Gillard, C. L., Shropshire, C. and Sikkema, P. H. 2013. Desiccation in dry edible beans with various herbicides. Can. J. Plant Sci. 93: 871–877. There is little information available on the effect of diquat, carfentrazone-ethyl, glufosinate ammonium, flumioxazin and saflufenacil applied alone or in tankmix combination with glyphosate as harvest aids in dry bean production under environmental conditions of the various production regions in Canada. A total of 11 field trials were conducted over a 3-yr period (2010, 2011, 2012) at Exeter, Ontario, Carman, Manitoba, and Lethbridge, Alberta, to evaluate various harvest-aid herbicides in dry bean. Comparison of leaf, pod and stem visual dry down at 4 and 8 d after desiccation application (DAA) indicated that adding a tankmix partner to glyphosate increased visual dry down of leaf, pod and stem 17, 10 and 15% at 4 DAA and 20, 17 and 14% at 8 DAA, respectively. At 8 DAA, glyphosate (450 or 900 g a.e. ha−1), diquat, glufosinate ammonium, carfentrazone-ethyl, flumioxazin and saflufenacil provided 13–58, 65–80, 64–71, 12–34, 36–52 and 41–73% dry down of the dominant weeds (AMARE, AMBEL, CHEAL and SETVI), respectively. Diquat, glufosinate ammonium, carfentrazone-ethyl, flumioxazin and saflufenacil tankmixed with glyphosate (450 or 900 g a.e. ha−1) provided 67–77, 65–71, 22–62, 45–69 and 44–74% weed dry down, respectively. Dry bean yield was not reduced with any of the desiccation treatments. Among desiccant treatments that provided consistent desiccation of dry bean and weeds, saflufenacil had the least environmental impact followed by flumioxazin, glufosinate ammonium and then diquat. Based on this study, diquat, glufosinate ammonium, flumioxazin and saflufenacil alone or in combination with glyphosate (450 or 900 g a.e. ha−1) provide consistent desiccation of weeds and dry bean.

Soltani, N., Nurse, R. E. and Sikkema, P. H. 2013. Weed management in white beans with postemergence herbicide tankmixes. Can. J. Plant Sci. 93: 669–674. Weed control efficacy of cloransulam-methyl, halosulfuron, bentazon, fomesafen and their tankmixes applied post-emergence (POST) for weed management in white bean was evaluated in field studies conducted in four Ontario locations during 2008–2011. Cloransulam-methyl, halosulfuron, bentazon, fomesafen, bentazon plus fomesafen, cloransulam-methyl plus bentazon, cloransulam-methyl plus fomesafen, cloransulam-methyl plus bentazon plus fomesafen, halosulfuron plus bentazon, halosulfuron plus fomesafen, and halosulfuron plus bentazon plus fomesafen caused white bean injury ranging from 1 to 18%. Control for AMARE, AMBEL and CHEAL ranged from 47 to 92%, 66 to 98% and 36 to 91%, respectively, among herbicide treatments. Similar results were observed for weed density and biomass of AMARE, AMBEL, and CHEAL. Cloransulam-methyl, halosulfuron, and cloransulam-methyl plus fomesafen reduced the yield of white bean by 34, 21, and 17%, respectively, compared with the weed-free control. However, bentazon, fomesafen, bentazon plus fomesafen, cloransulam-methyl plus bentazon, cloransulam-methyl plus bentazon plus fomesafen, halosulfuron plus bentazon, halosulfuron plus fomesafen, and halosulfuron plus bentazon plus fomesafen had no adverse effect on yield of white bean. Based on these results, tankmixes of cloransulam-methyl and halosulfuron with bentazon and fomesafen can reduce crop injury and provide control of broadleaf weeds in white bean.

Aphis fabae Scopoli (Hemiptera: Aphididae) is heteroecious and polyphagous that is harmful on secondary hosts such as many important agricultural products like beet, common bean, faba bean, potato and other products. This aphid is the cause of more than 33 viral transition. One of the mechanisms of plant resistance is antixenosis. This mechanism influences on placement and nutrition of pests that result in less damage. In this study, antixenosis resistance mechanism of 12 varieties of bean was tested. Experiment was on completely randomised design with 12 treatments and 6 replications. Bean varieties include of white bean, kidney bean and wax bean, and each replication includes one pot, and then, pots were placed under the isolated room that were filled with winged adult aphids in circular form. After 24 and 48 h, aphids and level of nymph production were counted. The lowest number of adult aphids was observed on Sayad variety among 12 varieties (during 24 h). The least number of produced nymphs was in Da...

Field trials were conducted over a three-year period (2009 to 2011) to evaluate the efficacy of pendimethalin preplant-incorporated (PPI), bentazon, fomesafen, bentazon plus fomesafen, or halosulfuron applied postemergence (POST) and the sequential application of pendimethalin applied PPI followed by bentazon, fomesafen, bentazon plus fomesafen or halosulfuron applied POST in white bean in Ontario. There was minimal effect on seed moisture content of white bean with the herbicides evaluated. Pendimethalin provided 97% control of A. retroflexus, 9% of A. artemisiifolia, 90% of C. album, 12% of S. arvensis, and 96% of S.viridis. Bentazon, fomesafen, bentazon plus fomesafen, and halosulfuron applied POST provided as much as 93% control of A. retroflexus, 86% control of A. artemisiifolia, 72% control of C. album, 99% control of S. arvensis, and 29% control of S. viridis. The sequential application of pendimethalin applied PPI followed by bentazon, fomesafen, bentazon plus fomesafen, and halosulfuron applied POST provided 100% control of A. retroflexus, 87% control of A. artemisiifolia, 90% control of C. album, 100% control of S. arvensis, and 95% control of S .viridis, respectively. White bean yield generally reflected the level of weed control.

A total of six field trials were conducted over a three-year period (2009 to 2011) to determine the tolerance of white and adzuki bean to pendimethalin plus reduced doses of imazethapyr applied preplant incorporated (PPI) in Ontario, Canada. There was minimal injury in white and adzuki bean with pendimethalin, imazethapyr and the tankmix of pendimethalin plus imazethapyr applied PPI at Harrow and Ridgetown. In contrast, at Exeter in 2009 and 2010, pendimethalin caused as much as 5 and 8% injury; imazethapyr caused as much as 18 and 5% injury; and the tankmix of pendimethalin plus imazethapyr caused as much as 20 and 14% injury in white and adzuki bean, respectively. Generally, the tank mixture of pendimethalin at 1080 or 2160 g ai ha-1 and imazethapyr at 37.5 g ai ha-1 had no adverse effect on height, biomass, seed moisture content and yield of white and adzuki bean. In white bean, the tank mixture of pendimethalin at 1080 or 2160 g ai ha-1 plus imazethapyr at 75 or 150 g ai ha-1 resulted in a decrease in height, biomass, and yield of white bean in some environments. In adzuki bean, the tank mixture of pendimethalin at 1080 g ai ha-1 plus imazethapyr at 37.5, 75 or 150 g ai ha-1 did not have any adverse effect on height, biomass, seed moisture content or yield. However, when the rate of pendimethalin was increased to 2160 g ai ha-1 in a tank mixture with imazethapyr at 37.5, 75 or 150 g ai ha-1, a decrease in adzuki bean height and biomass was observed but there was no effect on seed moisture content or yield. Based on this study, there is an adequate margin of crop safety for pendimethalin at 1080 g ai ha-1, imazethapyr at 37.5 g ai ha-1, and the tankmix of pendimethalin plus imazethapyr at 1080 + 37.5 g ai ha-1 applied PPI in white and adzuki bean. Key words: Imazethapyr, navy bean, pendimethalin, Phaseolus vulgaris, Vigna angularis.

A total of twelve field trials (6 with kidney bean and 6 with white bean) were conducted over a three-year period (2010 to 2012) at various locations in Ontario to evaluate the tolerance of kidney and white bean to imazethapyr applied preplant incorporated (PPI), preemergence (PRE), and postemergence (POST) at 37.5, 75 and 150 g·ai·ha-1. Imazethapyr applied PPI or PRE in kidney or white bean caused 0%-1%, 0%-4%, and 0%-9% injury at 1, 2, and 4 weeks after application (WAA), respectively. However, the injury was transient and had no adverse effect on shoot dry weight, height, seed moisture content, and yield of kidney or white bean except for shoot dry weight which was reduced 32% with imazethapyr applied PPI compared to the weed free control in white bean. Imazethapyr applied POST in kidney or white bean caused as much as 17%, 18%, and 11% injury at 1, 2, and 4 WAA, respectively. There was no adverse effect on shoot dry weight, height, seed moisture content, and yield of kidney or white bean except for imazethapyr applied POST which increased seed moisture content 1.9% compared to the weed free control in white bean. Based on these results, there is an adequate margin of crop safety in dry bean to imazethapyr applied PPI or PRE at 37.5 or 75 g·ai·ha-1 in kidney and white beans. However, there is not an adequate margin of crop safety for imazethapyr applied POST at rates higher than 37.5 g·ai·ha-1 in kidney and white bean.

The effects of bean variety, planting date and depth on Fusarium root rot (FRR) and yield components were evaluated at the pod maturity growth stage of common bean in an experimental field under natural conditions at Zanjan, Iran. FRR symptoms were evident in all experimental plots studied over two seasons. A lower FRR index was detected in a red variety compared to a white bean variety planted on 5 May at 5 and 15 cm depths, and on 22 May and 5 June at 5 cm depth. At depths of 5 and 10 cm, beans planted on 22 May had lower FRR levels in comparison with 5 May plantings. FRR index for bean varieties planted at different dates was lower at 5 cm than at 15 cm depth. Mean numbers of pods and seeds per plant in the red bean variety were often higher than those in the pinto and white bean varieties. Postponing planting until 5 June resulted in reductions in pod (red) and seed (red and white varieties) production for 10 and 15 cm seeding depths, but increased yield levels at a seeding depth of 5 cm in the red variety. Shallow seeding at a 5 cm depth enhanced yield levels in 22 May and 5 June plantings of red and pinto varieties, but decreased yields in the red variety planted on 5 May. There were negative correlations between FRR and yield variables. Findings extend our insight into a date-depth-variety interaction to optimize management strategies for FRR in bean crops.

Eight field trials were conducted from 2006 to 2008 at various locations in Ontario to evaluate the co-application of postemergence herbicides with cyhalothrin-lambda or dimethoate insecticides in cranberry and white bean. At 2 weeks after treatment, the addition of cyhalothrin-lambda or dimethoate insecticides to sethoxydim, quizalofop-p-ethyl, bentazon, fomesafen and bentazon plus fomesafen did not increase injury at the Exeter and Ridgetown locations except for bentazon plus dimethoate which caused greater injury than bentazon alone (2.9% vs 0.2%) in 2006. However at Harrow, the addition of dimethoate to quizalofop-p-ethyl increased injury (0% vs 4.9%) in 2007 and the addition cyhalothrin-lambda or dimethoate to sethoxydim increased injury in 2008 in dry bean. The addition of cyhalothrin-lambda to quizalofop-p-ethyl also increased injury (0% vs 4.5%) in 2008. There was no adverse effect on dry bean injury with other treatments at Harrow in 2007 or 2008. The addition of cyhalothrin-lambda or dimethoate to the herbicides evaluated did not have any adverse effect on plant height, shoot dry weight or yield of dry bean except for bentazon plus dimethoate which decreased shoot dry weight 20% compared to bentazon alone at Harrow in 2008. Based on these results, cyhalothrin-lambda or dimethoate can be tank-mixed with sethoxydim, quizalofop-p-ethyl, bentazon, fomesafen and bentazon plus fomesafen when the optimum application timing of these herbicides and insecticides coincide.

Bentazon, applied as a tankmix, has been shown to have the potential for reducing the injury from some POST herbicides. Field experiments were conducted in 2008 and 2009 at Exeter, ON and in 2009 at Ridgetown, ON to determine if the addition of bentazon reduces the injury from cloransulam-methyl or halosulfuron-methyl applied POST in black, cranberry, kidney and white beans. Bentazon added to cloransulam-methyl reduced the level of injury 0 to 6% at 17.5 g·ai·ha–1 and 0 to 9% at 35 g·ai·ha–1 in dry bean. Bentazon added to halosulfuron-methyl reduced the level of injury as much as 4% at 35 g·ai·ha–1 and 6% at the 70 g·ai·ha–1. Bentazon added to cloransulam-methyl increased plant height as much as 3 cm. The addition of bentazon to halosulfuron-methyl had no effect on the height of various market classes of dry bean. Bentazon added to cloran-sulam-methyl generally has no effect on seed moisture content in black and white bean but decreased seed moisture content of cranberry and kidney bean as much as 4%. The addition of bentazon to halosulfuron-methyl caused no effect on seed moisture content of dry bean. Cloransulam-methyl caused a 7% to 18% reduction in dry bean yield compared to halosulfuron-methyl and 12% to 21% reduction in yield compared to bentazon. Bentazon added to cloransulam-methyl increased dry bean yield by 0.16 and 0.31 t·ha–1 at Exeter (2009) and Ridgetown (2009) respectively. The addition of bentazon to halosulfuron-methyl had no effect on dry bean yield.

Three field experiments were conducted over a three-year period (2009 to 2011) to evaluate various preplant incorporated (PPI) herbicides in white bean in Ontario, Canada. There was minimal visible injury in white bean for any of the treatments evaluated. The control of AMARE, AMBEL, CHEAL, SETVI, and SINAR ranged 91%-93%, 13%-21%, 56%-92%, 96%-98%, and 16%-24% with pendimethalin, 93%-99%, 34%-43%, 65%-99%, 95%-100%, and 20%-47% with trifluralin, 66%-77%, 61%-76%, 64%-86%, 94%-99%, and 52%-74% with EPTC, 92%-98%, 27%-48%, 28%-76%, 96%-99%, and 33%-59% with s-metolachlor, 98% - 99%, 50%-72%, 33%-88%, 98%-99%, and 56%-78% with dimethenamid, and 98%-100%, 72%-84%, 97%-100%, 77%-88%, and 98%-100% with imazethapyr, respectively. Weed density and dry weight reduction were similar to visible weed control. Imazethapyr applied PPI at the 75 g ai ha-1 provided yield equivalent to the weed-free check in 2009 and 2011. All other herbicide treatments had significantly lower yield than weed-free check. All herbicide treatments except pendimethalin at 1080 g ai ha-1, EPTC at 4400 g ai ha-1, and imazethapyr at 75 g ai ha-1 had yield equivalent to the weed-free check in 2010. Based on environmental impact (EI) analysis, the herbicide program with the lowest environmental risk was imazethapyr followed by dimethenamid-p, trifluralin, s-metolachlor, EPTC, and then pendimethalin. Economic analysis of herbicide treatments evaluated indicates that imazethapyr had the greatest positive impact on profit margins, followed by dimethenamid-p and EPTC, followed by s-metolachlor and trifluralin and then pendimethalin.

There is little information on the tolerance of dry bean to pendimethalin. Field studies were conducted in 2007 to 2009 at Exeter, Ontario and in 2008 and 2009 at Ridgetown, Ontario to evaluate tolerance of black, cranberry, kidney, otebo, pink, pinto, Small Red Mexican and white bean to the pendimethalin applied preplant incorporated at 1080 and 2160 g.a.i.ha-1. Pendimethalin PPI caused minimal injury in most market classes of dry bean at 1 and 2 WAE. There was no injury in various market classes of dry bean with the low dose at 1 and 2 weeks after emergence (WAE). However, at the high dose there was 0 to 4% injury at 1 WAE and 0 to 7% injury at 2 WAE in black, cranberry, kidney, otebo, pink, pinto, SRM and white bean. Pendimethalin PPI was more injurious in white bean than in black, cranberry, kidney, otebo, pink, pinto and SRM bean. Pink and SRM bean exhibited the most tolerance to pendimethalin applied PPI at 1080 g.ai.ha-1 or 2160 g.ai.ha-1. Pendimethalin caused no adverse effect on plant height, shoot dry weight, seed moisture content and seed yield of black, cranberry, kidney, otebo, pink, pinto, SRM and white bean. Based on these results, there is an adequate margin of crop safety for pendimethalin applied PPI at the proposed dose of 1080 g.ai.ha-1 in black, cranberry, kidney, otebo, pink, pinto, SRM and white bean in Ontario.

OAC Dublin (CFIA registration no. 6599) is an indeterminate bush white bean (Phaseolus vulgaris L.) cultivar intended for use in areas with greater than 2600 crop heat units (CHU). It has excellent yield potential in either wide or narrow row production. Its seed has acceptable cooking and canning quality.Key words: Phaseolus vulgaris L., white bean, common bean, cultivar description

The effect of extrusion conditions, including feed rate (2.52–6.84 kg/h), feed moisture content (13–19% wet basis), screw speed (150–250 rpm), and extrusion temperature (150–260°C) on the mechanical properties of corn/legume-based extrudates was studied. White bean and lentil were used in mixtures with corn flour at a ratio of 10:90 up to 90:10 (corn:legume). Simple power models were used to correlate breaking stress and corresponding strain with extrusion conditions and material characteristics. The influence of feed rate on the extrudates mechanical properties was incorporated in the mean residence time. The breaking stress of extrudates decreased with temperature, residence time, and corn to legume ratio, and it increased with feed moisture content. The corresponding strain showed an opposite trend. Screw speed did not affect the extrudate properties. The use of lentil flour led to a product with higher breaking stress. Furthermore, in a previous work, the porosity of these products was modeled and, no...

The level of tolerance of various market classes of dry bean to cloransulam-methyl is not known. Three field studies were conducted in Ontario, Canada during 2007 and 2008 to determine the level of tolerance of black, cranberry, kidney, and white bean to the pre-emergence (PRE) and postemergence (POST) application of cloransulam-methyl at 17.5, 35, and 70 g ai ha−1. Cloransulam-methyl applied at 17.5, 35, and 70 g ha−1 caused between 13 and 23% injury in black, cranberry, kidney, and white bean, respectively. Cloransulam-methyl applied at 17.5, 35, and 70 g ha−1 reduced the shoot dry weight by between 16 and 28% compared to the untreated control. Cloransulam-methyl applied PRE reduced the height of black bean by 27% and the height of cranberry bean by 25% at 70 g ha−1 and reduced the height of white bean by 19% at 35 g ha−1 and by 37% at 70 g ha−1. Cloransulam-methyl applied PRE reduced the yield of black bean by 29% at 35 g ha−1 and by 43% at 70 g ha−1, reduced the yield of cranberry bean by 43% at 70 g ha−1, and reduced the yield of white bean by 36% at 35 g ha−1 and by 54% at 70 g ha−1. Based on these results, there is not an adequate margin of crop safety for the PRE and POST application of cloransulam-methyl in black, cranberry, kidney, and white bean at the rates evaluated.

Five field trials were conducted over a 2-yr period (2007, 2008) at various locations in Ontario to evaluate the tolerance of black, cranberry, kidney, otebo, pink, pinto, small red Mexican (SRM), and white bean to halosulfuron applied PPI, PRE, and POST at 35 and 70 g ai/ha. There was minimal injury (3% or less) with halosulfuron applied PPI or PRE in dry bean. At Exeter and Ridgetown, halosulfuron applied POST at 35 and 70 g/ha caused 3 to 5% and 4 to 8% injury in dry bean, respectively at 1 wk after herbicide application (WAA). The injury was transient with no significant injury at 2 and 4 WAA. At Harrow, halosulfuron POST at 35 and 70 g/ha caused as much as 4% injury at 35 g/ha and 14% injury at 70 g/ha in dry bean. Halosulfuron applied PPI, PRE, and POST at 35 and 70 g/ha caused no decrease in plant height of dry bean except for kidney bean, which was reduced 6% at 70 g/ha, and white bean, which was reduced 3% at both 35 and 70 g/ha. Halosulfuron applied PPI, PRE, and POST at 35 and 70 g/ha caused no decrease in dry bean yield except for kidney bean, which was reduced 9% at 35 g/ha and 10% at 70 g/ha; otebo bean, which was reduced 3% at 70 g/ha; and white bean, which was reduced 7% at both 35 and 70 g/ha. On the basis of these results, there is an adequate margin of crop safety in dry bean to halosulfuron applied PPI or PRE at 35 and 70 g/ha. In addition, there is an adequate margin of crop safety in black, cranberry, pink, pinto, and SRM bean to halosulfuron applied POST at 35 and 70 g/ha. However, further research is required to ascertain the tolerance of kidney, otebo, and white bean to halosulfuron applied POST.

Dry bean producers in Ontario, Canada, have few herbicide options available for annual broad-leaved weed management and there is little information on the tolerance of dry bean to linuron. The tolerance of black, cranberry, kidney, and white bean to the pre-emergence (PRE) application of linuron at the rates of 0, 500, 1000, 1500, 2000, and 2500 g ai ha⁻¹ was evaluated in field studies conducted in 2005 and 2006 at Exeter and in 2006 at Ridgetown, Ontario. The four market classes differed in their response to linuron. Cranberry and kidney bean were more tolerant to the PRE application of linuron than black and white bean. Linuron applied PRE caused as much as 12% injury in cranberry and kidney bean, 47% injury in black bean, and 56% injury in white bean. Linuron applied PRE at 500-2500 g ai ha⁻¹ had no effect on the height of cranberry and kidney bean but decreased the height by 7, 8, and 15% in black bean and by 10, 13, and 23% in white bean at 1500, 2000, and 2500 g ai ha⁻¹, respectively. Linuron applied PRE at the rates evaluated did not cause any adverse affect on the yield of cranberry, kidney, and white bean but black bean yield was reduced by 16% at 2500 g ai ha⁻¹. Based on these results, there is not an adequate margin of crop safety for the PRE application of linuron in black and white bean at rates >1000 g ai ha⁻¹. However, there is a potential for the use of linuron PRE for weed management in cranberry and kidney bean at the rates evaluated.

Tolerance of white bean to the pre-emergence application of imazethapyr at the dose of 0, 25, 50, 75, 150 and 300 g ai ha−1 was studied at 11 Ontario, Canada locations over a 3-year period. White bean tolerance to imazethapyr was dependent on dose and environmental conditions. Crop injury generally increased as the dose was increased. Imazethapyr-applied pre-emergence caused up to 62% visible injury and reduced plant height as much as 32%, shoot dry weight 48%, root dry weight 20% and yield 77%. Seed moisture content was increased as much as 1.1%. The dose of imazethapyr to cause 5%, 10% and 20% injury in white bean was as low as 17, 31 and 58 g ai ha−1 for visible injury, 36, 73 and 155 g ai ha−1 for plant height, 4, 9 and 22 g ai ha−1 for shoot dry weight, 27, 54 and 108 g ai ha−1 for root dry weight, and 10, 21 and 44 g ai ha−1 for yield, respectively. Leaf tissue potassium (K) concentration was not affected with imazethapyr at 25, 50 and 75 g ai ha−1; however, it was reduced 27% at 150 g ai ha−1 and 36% at 300 g ai ha−1. Based on these results, imazethapyr-applied pre-emergence at the currently registered dose of 75 g ai ha−1 in white bean in Ontario has the potential to cause significant crop injury and yield losses under some environmental conditions.

The effect of extrusion conditions, including feed rate (2.52–6.84 kg/h), feed moisture content (13–19% wet basis), screw speed (150–250 rpm), and extrusion temperature (150–230°C) on structural properties of corn-legume based extrudates was studied. Four different types of legumes, chickpea, mexican bean, white bean, and lentil were used to form mixtures with corn flour in a ratio ranging from 10 to 90% (corn/legume). A simple power model was used to correlate porosity with extrusion conditions and material characteristics. The influence of feed rate in the extrudates porosity is incorporated into mean residence time. Porosity of extrudates was found to increase with temperature and residence time and to decrease with feed moisture content and corn to legume ratio. Screw speed did not affect extrudates properties. Expansion ratio showed a similar behavior with porosity. The addition of legumes (protein source) led to more dense products. Comparatively, the usage of white bean in mixtures for the producti...

Tolerance of eight cultivars of dry beans representing eight market classes (black, brown, cranberry, kidney, otebo, pinto, white, and yellow eye beans) to the pre-emergence application of clomazone at the dose of 1116 and 2232 g a.i. ha −1 was studied at Exeter and Ridgetown, Ontario, Canada in 2003 and 2005. Clomazone applied pre-emergence caused 5%, 4%, and 1% visual injury at 1116 g ha −1 and 11%, 10%, and 4% visual injury at 2232 g ha −1 in dry beans at 7, 14, and 28 days after emergence (DAE), respectively. Visual injury increased with dose and decreased over time. Visual injury was minimal by 28 DAE (less than 5%) and had no adverse effect on plant height, shoot dry weight and yield of any market class of dry beans evaluated. Seed moisture content measured at harvest ranged from 17% to 24% for the various market classes of dry beans and was not affected by the application of clomazone. White bean exhibited the least visual injury followed by brown, kidney, yellow eye, otebo, pinto, and then black and cranberry beans. Based on these results, clomazone applied pre-emergence at 1116 g ha −1 has an adequate margin of crop safety for use in black, brown, cranberry, kidney, otebo, pinto, white, and yellow eye beans.

Summary. Kisra is a fermented sorghum flour bread which constitutes the staple diet in Sudan. Sorghum, like other cereals, has some limitations due both to its low protein content and to limitations in some essential amino acids particularly lysine. The objective of the present work was to increase the protein content of Kisra and improve the amino acid profile, especially lysine. Protein isolates were prepared from bonavist bean and white bean by alkaline extraction. The protein isolates were used to increase the protein content of the fermented sorghum dough to about 25%. The legume protein isolate supplemented dough was fermented in the traditional method used for making Kisra. The most significant effect of Kisra supplementation was the improvement in protein content (two-fold) as well as the increase in the limiting amino acids. The results indicated a significant increase (P < 0.01) in lysine in the protein supplemented doughs and Kisras as compared to the control. The increase in lysine ranged 2–2.6 folds. Sorghum supplementation with legume protein isolates was not accompanied by signifi- cant changes in organoleptic properties of the end product.

Three field trials were conducted over a 2-yr period (2004 and 2005) at Exeter and Ridgetown, Ontario to evaluate the tolerance of eight market classes of dry beans to KIH-485 applied PRE at 210 and 420 g ai/ha. KIH-485 PRE caused as much as 67% visual injury in small-seeded and 44% visual injury in large-seeded dry beans. KIH-485 applied PRE at 420 g/ha reduced plant height up to 47% at Ridgetown and 8% at Exeter in 2004, and reduced height of brown and white bean by 15 and 19%, respectively, but had no effect on the height of the other beans in 2005. Shoot dry weight was not affected at Exeter in 2004 but was reduced by 46% at Ridgetown in 2004 and 14% at Exeter in 2005. In 2004, seed moisture content increased by 5, 6, and 12% in black, otebo, and pinto beans, respectively. Seed yield was reduced up to 27% at Ridgetown and 11% at Exeter in 2004 but was not affected at Exeter in 2005. On the basis of this research, KIH-485 PRE causes unacceptable injury in some dry bean market classes. Nomenclature: KIH...

White bean seeds were subjected to soaking in distilled water for 1, 2 and 3 days. In order to perform complete processing, the seeds were cooked until soft. Effects of soaking and/or cooking of white bean seeds on antinutritional factors, mineral contents and HCl-extractability were studied. Phytic acid and polyphenol contents of all cultivars were reduced. Soaking alone and soaking, followed by cooking, reduced mineral contents of the cultivars, but HCl-extractability was significantly (P ⩽ 0.01) improved to varying extents, depending on cultivar type. Soaking and/or cooking treatment was thus found to be an effective technique and caused further improvement in the availability of both major and trace minerals in white bean.

Three field trials were established from 2001 to 2003 in Ontario to determine the effect of foramsulfuron POST (35 and 70 g ai/ha), isoxaflutole PRE (105 and 210 g ai/ha), and isoxaflutole plus atrazine PRE (105 + 1063 and 210 + 2126 g ai/ha) applied in the previous years to field corn on cranberry, black, kidney, and white (navy) bean. Foramsulfuron residues did not cause visible injury, or reductions in shoot dry weight or yield of dry bean 1 yr after application in corn. In contrast, visual injury across the four market classes varied from 4 to 37% 1 yr after application of isoxaflutole, and from 30 to 54% 1 yr after application of isoxaflutole plus atrazine. Isoxaflutole residues reduced shoot dry weight and yield as much as 81 and 44% in cranberry, 52 and 39% in black, 53 and 19% in kidney, and 42 and 19% in white bean, respectively. Isoxaflutole plus atrazine residues reduced shoot dry weight and yield as much as 87 and 64% in cranberry, 75 and 61% in black, 71 and 46% in kidney, and 65 and 33% in white navy bean, respectively. Injury was not detected regardless of market classes 2 yr after application of isoxaflutole alone or in tank mix with atrazine. Based on these results, it is recommended that none of the market classes of dry bean tested in this study should be grown 1 year after an application of isoxaflutole or isoxaflutole plus atrazine. A recropping interval of 2 years is currently recommended following applications of isoxaflutole or isoxaflutole plus atrazine for these market classes of dry bean.

OAC Rex is an upright indeterminate bush white bean (Phaseolus vulgaris L.) cultivar intended for use in areas with greater than 2800 crop heat units. It has good yield potential in either wide or narrow row production. It is resistant to races 1 and 15 of bean common mosaic virus and is the first common bean cultivar resistant to common bacterial blight (Xanthomonas axonopodis pv. phaseoli) in Ontario. Seed has acceptable cooking and canning quality. Key words: Phaseolus vulgaris L., white bean, common bean, common bacterial blight, cultivar description

There is little information on the sensitivity of dry beans to flumioxazin. Tolerance of eight cultivars of dry beans representing four market classes (black, cranberry, kidney, and white beans) to preplant incorporated (PPI) and preemergence (PRE) applications of flumioxazin at the rate of 52.5, 70, and 140 g ai/ha were studied in three field experiments in Ontario in 2002 and 2003. There were no differences (P < 0.05) between two cultivars within a market class in their responses to flumioxazin. However, the four market classes differed in their responses to flumioxazin. Black and white beans were more sensitive to the PRE application of flumioxazin than cranberry and kidney beans. Flumioxazin applied PRE at 140 g/ha caused as much as 34% visual injury and reduced plant height by 23 to 28%, shoot dry weight by 35 to 39%, and yield by 20 to 30% in black and white bean market classes. Flumioxazin-applied PPI did not injure any market class. On the basis of this research, there is an acceptable margin of crop safety in these black and white bean cultivars only when flumioxazin is applied PPI. The two cranberry and kidney bean cultivars were tolerant to all rates of flumioxazin applied both PPI and PRE.

There is a limited number of registered herbicides in white beans. Field trials were conducted at two Ontario, Canada, locations (Exeter and Ridgetown) in 2001 and 2002 to evaluate tolerance of two white bean cultivars, AC Compass and OAC Thunder, to preplant-incorporated applications of S-metolachlor plus imazethapyr (1600 + 75 and 3200 + 150 g ai ha−1, respectively), flumetsulam plus S-metolachlor (premixed at 1443 and 2886 g ai ha−1) and cloransulam-methyl (35 and 70 g ai ha−1). There were no differences between the two cultivars in their responses to the herbicide treatments. S-metolachlor plus imazethapyr caused as much as 5% visual crop injury and decreased plant height up to 20%, shoot dry weight up to 39% and yield as much as 21%. Flumetsulam plus S-metolachlor caused as much as 7% visual crop injury and reduced plant height by up to 25%, shoot dry weight by up to 46% and yield as much as 24%. Cloransulam-methyl caused as much as 10% visual crop injury and decreased plant height up to 35%, shoot dry weight up to 55% and yield as much as 44%. There were no differences in seed moisture content among any of the herbicide treatments. This research suggests that the margin of safety of white bean is inadequate to support the preplant-incorporated registration of S-metolachlor plus imazethapyr, flumetsulam plus S-metolachlor and cloransulam-methyl in Ontario.

White bean producers have a limited number of herbicide options available for annual grass and broadleaf weed control. Tolerance of two white bean cultivars to preemergence (PRE) applications ofS-metolachlor,S-metolachlor + imazethapyr, flumetsulam +S-metolachlor, cloransulam-methyl, clomazone, clomazone + imazethapyr, and clomazone +S-metolachlor at the maximum labeled rate in soybean (1×) and twice the labeled rate (2×) were studied at two Ontario locations (Exeter and Ridgetown) in 2001 and 2002.S-Metolachlor, clomazone, and clomazone +S-metolachlor generally had no negative effect on plant height, dry weight, maturity, and yield.S-Metolachlor + imazethapyr and clomazone + imazethapyr reduced plant height, dry weight, and yield as much as 21, 42, and 24%, respectively. Flumesulam +S-metolachlor and cloransulam-methyl reduced plant height, dry weight, and yield as much as 39, 58, and 43%, respectively. White beans are tolerant to PRE applications ofS-metolachlor, clomazone, and clomazone +S-metolachlor. White beans are sensitive to PRE applications ofS-metolachlor + imazethapyr, flumetsulam +S-metolachlor, clomazone + imazethapyr, and cloransulam-methyl.

Powder and essential oil obtained from dry ground leaves of Chenopodium ambrosioides were tested under laboratory conditions (25±1°C, 70–75% r.h.) for their ability to protect grains from damage by six insect pests, Callosobruchus chinensis , C. maculatus , Acanthoscelides obtectus , Sitophilus granarius , S. zeamais and Prostephanus truncatus . The insects were reared and tested on whole maize grain for S. zeamais and P. truncatus , whole wheat for S. granarius , green peas for C. chinensis , mung bean for C. maculatus and white bean for A. obtectus . The powder prepared from dry leaves of C. ambrosioides was mixed with grains at different dosages ranging from 0.05–0.80% (wt/wt) for C. chinensis , C. maculatus and A. obtectus and from 0.8–6.4% (wt/wt) for S. granarius , S. zeamais and P. truncatus . The dosage of 0.4% killed more than 60% of all the bruchids 2 days after treatment, while a dosage of 6.4% induced total mortality of S . granarius and S. zeamais within the same exposure time. All levels of the dry ground leaf concentrations inhibited F1 progeny production and adult emergence of the tested insects. The dosage of 0.2 μl/cm 2 of the essential oil killed 80–100% of the beetles within 24 h except C. maculatus and S. zeamais , where this dosage induced only 20% and 5% mortality, respectively. These results indicate a scientific rationale for the use of this plant in grain protection by local communities in the western highlands of Cameroon.

Verano', Reg. No. CV-282, PI 653706, a multiple disease resistant white bean (Phaseolus vulgaris L.) cultivar adapted to the humid tropics, was developed and released in 2007 cooperatively by the University of Puerto Rico Agricultural Experiment Station and the USDA-ARS. Verano has tolerance to high temperature and resistance to Bean golden yellow mosaic virus, a whitefl y (Bemisia tabaci (Gennadius))-transmitted begomovirus, Bean common mosaic virus, and common bacterial blight (caused by Xanthomonas axonopodis pv. phaseoli (Smith) Dye). The release and adoption of a high temperature-tolerant cultivar such as Verano will improve yield and seed quality of green-shelled beans produced in Puerto Rico. Verano possesses traits that may be useful to breeding programs where high temperature, viral diseases, and common bacterial blight limit bean production.

Galley, white bean (navy bean) (Phaseolus vulgaris L), has good yield potential with dull white seed coat luster and semi-determinate growth habit with upright plant type. It is resistant to lodging, early medium season maturity in southwestern Ontario. Key words: Phaseolus vulgaris, dry bean, cultivar description, plant type, white mould

Field and laboratory studies were conducted to determine if differences existed in pinto bean varietal toler- ance to postemergence application of imazethapyr under field conditions; if differences in tolerance were due to differ- ential acetolactate synthase enzyme sensitivity or differences in 14C-imazethapyr absorption, translocation, and metabo- lism; and the heritability of inazethapyr tolerance in pinto bean. All rates of imazethapyrinjured Olathe, Sierra, UI-114, P89405, Aztec, and P90570 pinto bean varieties 7 d after treatment in 1991 and 1992, except 53 g ai ha-1 of imaze- thapyr applied to Sierra pinto bean in 1991. Olathe was injured more than other varieties in 1991, and physiological maturity of Olathe was delayed more than Sierra in 1991 and 1992. Seed yields of all varieties were not reduced in 1991, and only P90570 had reduced seed yields from 53 g ha-' of imazethapyr in 1992. Differential sensitivity of the acetolac- tate synthase enzyme to imazethapyr was not the mechanism of differential varietal response. Olathe pinto bean absorbed and translocated 1.4 and 1.3 times more 14C-imazethapyr, respectively, than Sierra pinto bean 24 h after application. No differences in 14C-imazethapyr metabolism were detected between Olathe and Sierra pinto bean. Broad heritability of inazethapyr tolerance in pinto bean was calculated to be 0.85. The number of genes controlling the inheritance of inazethapyr tolerance in pinto bean was greater than one. Nomenclature: Imazethapyr, 2-(4,5-dihydro-4-methyl-4- methyl-4-(1-methylethyl)-5-oxo-lH-imidazol-2-yl)-5-ethyl

The influence of dehulling and cooking on in-vitro Fe dialysability from two varieties of Phaseolus vulgaris L. (mottled and white beans) was investigated. Fe and seed constituents (phytate, tannin, dietary fibre) were differently distributed between hull and cotyledon. Fe dialysability from mottled bean was 2.5%, from white bean 3.6%. Dehulling significantly decreased Fe dialysability (36%, P < 0.025) from both varieties. Cooking significantly reduced Fe dialysability from mottled bean (59%, P < 0.025), whereas in white bean no modifications were detected. On the other hand, cooking positively influenced Fe dialysability from cotyledon: compared with the raw samples, both varieties showed a significant increase (54%, P < 0.025) in Fe dialysability. This study showed that localization of both Fe and some seed constituents in seed affected Fe dialysability. Changes in food constituents (i.e. degree of protein digestion) account for the modifications in Fe dialysability subsequent to cooking.

Four new cowpea cultivars (IT81D-699, IT82E-18, IT84S-2246-4 and TVx 3236) were evaluated for their physicochemical properties and cooking quality. The four cultivars fell into two categories (rough and smooth) according to testa texture, and varied in seed dimensions and weights with IT81D-699 and IT84S-2246-4 having smaller seed volume than IT82E-18 and TVx 3236. Leached solids, swelling capacity and seed coat percentage were within a range of 0·33–0·94 g per 100g, 77·0–123·5 g per 100 g and 5·6–15·7% w/w of dry beans respectively. The total polyphenol content of the brown or cream-coloured beans were similar (1·53–1·96 mg g−1) but higher than the amount (1·03 mg g−1) found in the white bean. Cooking time varied between 29 and 37 min and was reduced by about 21% following a presoaking treatment in water for 12 h at room temperature (28 °C). Cooking time was significantly positively correlated (P < 0·05) with seed weight (r = 0·82) and seed volume (r = 0·75). Water absorption was not related to cooking time, and was much lower for the cultivar with larger seeds. No significant difference in hardness was found between unsoaked beans cooked for 30 min and soaked beans cooked for 10 min, suggesting that cookability for all cultivars was improved through soaking.

This study was conducted to determine how fast and slow cooking dry bean cultivars and novel cooking methods affected firewood use, cooking time, and cooked bean texture among 15 homesteads in southern Rwanda. Cooking was done on the homestead by the women of the household with a known quantity of firewood. ‘Calima’ and ‘Rubona 5’ were evaluated as pure lines and as components of market mixtures. The open wood fire cooking method was compared to cooking beans after soaking them overnight and cooking beans in a haybasket cooker. Results indicated that the use of the haybasket cooker and ‘Calima’ (fast‐cooking), significantly reduced fuelwood consumption and the amount of labor needed to prepare beans for eating. ‘Calima’ required 16% less firewood and 8% less time to cook than the slower cooking cultivar ‘Rubona 5’. The haybasket cooker used 40% less firewood than the traditional open fire cooking method.

A germplasm line, HR46, of white (navy/pea) bean (Phaseolus vulgaris L.) has been released for its insensitivity to foliar application of the herbicide metobromuron. This line is a full-season white bean in southwestern Ontario with high yield potential and acceptable canning quality. It is resistant to delta race of anthracnose and races 1 and 15 of bean common mosaic virus. Key words: Germplasm, white, bean (navy/pea), herbicide insensitivity, metobromuron

Five legumes including chick pea (Cicer arietinum Linn), pigeon pea (Cajanus cajan Linn. Huth.), black bean (Phaseolus vulgaris Linn), mung bean (Phaseolus areus Roxb) and white bean (Phaseolus vulgaris Linn) were cooked and tested for blood glucose response among healthy human volunteers. The blood glucose response to all legumes was significantly lower compared to bread. The glycaemic response to chick pea was significantly lower (P < or = 0.01) than that to black bean, pigeon pea and mung bean. The glycaemic index of chick pea (13.87 +/- 3.0) was significantly lower than those of black bean (27.91 +/- 4.0), pigeon pea (30.99 +/- 4.1) and mung bean (44.38 +/- 5.8) (P < 0.01) but was not different from that of white bean (19.48 +/- 4.9). The differences in the glycaemic responses among the legumes could be due to the differences in amount and kind of dietary fibre, amylose content and the presence of antinutrients. Legumes could therefore be added to the list of foods for diabetics and hyperlipidaemics and continuous consumption in larger amounts should be recommended to the general Filipino population.