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Screening for Effective Organic Farming Materials for the Control of Cucumber Scab Caused by Cladosporium cucumerinum

Screening for Effective Organic Farming Materials for the Control of Cucumber Scab Caused by Cladosporium cucumerinum

Authors :
Sung-Jun Hong
So-Hyang Park
Min-Jeong Kim
Jong-Ho Park
Chang-Ki Shim
Yong-Ki Kim
Eun-Jung Han
Source :
Research in Plant Disease, Vol 23, Iss 2, Pp 159-167 (2017)
Publication Year :
2017
Publisher :
Korean Society of Plant Pathology, 2017.

Abstract

This study was conducted to evaluate the control efficacy of the organic farming materials on cucumber scab caused by Cladosporium cucumerinum PT1 (KACC 48094). The antifungal activities in vitro as well as the suppressive effect of 43 organic farming materials on the spore germination and germ tube growth by inoculating spore suspension on cucumber seedlings in vivo were investigated. Thirteen organic farming materials inhibited the mycelial growth of C. cucumerinum and nine of these were microbial agents. In the screening using cucumber seedlings, six organic farming materials were very effective with control efficacy value of 90%. Among them, Bacillus amyloliquefaciens M27 provided suppressive effect on both mycelial growth and spore germination against cucumber scab. Finally, nine organic farming materials were selected to test the protective and curative effects, and all chosen organic farming materials significantly suppressed disease incidence when applied in the preventive action, in comparison with the curative action. Especially, Bordeaux mixture I and III gave excellent protective control efficacy with control values of 96.7% and 73.3%, respectively, whereas its curative control effect was significant low. Among these, only Thymus quinquecostatus+Sophora extract showed curative activity, although the control value was as low as 50%. This study suggests that cucumber scab can be controlled by some organic farming materials in the farmhouses under comparatively cold and wet condition and protective treatment is more important and efficient.

Details

ISSN :
15982262
Volume :
23
Database :
OpenAIRE
Journal :
Research in Plant Disease
Accession number :
edsair.doi.dedup.....8dcddbfcc093b162b91a6cd5fcd24fa2
Full Text :
https://doi.org/10.5423/rpd.2017.23.2.159