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The wheat curl mite (WCM) is microscopic, and therefore mite movement is difficult to track in the field. However, the virus complex it transmits causes observable and measurable changes to chlorophyll content and biomass. The ability to detect WCM (vectored viruses) with remote sensing was investigated by comparing vegetation indices calculated from proximal sensing data to ground-reference data obtained in the field. Of the 10 vegetation indices evaluated, the red-edge position (REP) provided the best relationship with virus symptoms observed in wheat. There was a significant and high correlation between REP and relative chlorophyll values and biomass and a significant, but lower, correlation between REP and percentage virus infection. [ABSTRACT FROM AUTHOR]

Field experiments were carried out with the goal of estimating the population fluctuations of the wheat curl mite,Aceria tulipaeKeifer, and its control. These experiments were conducted at an abandoned wheat field in Egypt during a growing season in 2012 in Cairo Governorate. Also, studies on life history aspects and reproductive parameters of the same species in the laboratory at 251 °C and 6015% R.H. were carried out. There were population fluctuations of the wheat curl mite,A. tulipae, when affected by temperature increase during the experimental season. The results showed that the population fluctuation continued at a moderate level until the end of February and then started to increase until it reached to three peaks from the mid of March to the mid of April when the temperature degrees were at 17–24 °C.A. tulipaeremoves cell contents of the leaves which generally become yellow. The obtained data indicated that the total developmental time of the immature stages was 8.90 ± 0. 74 and 9.58 ± 0.88 days for male and female, respectively, and the female fecundity was 22.8 eggs; 1.17 eggs/♀/day. Intrinsic rate of increase (rm) was found to be 0.153 individuals per female per day and the population multiplied 12.54 times in a generation time of 19.20 days under the given conditions. Three acaricides: Abamectin, Antimite and Sulphur were selected to control the wheat miteA. tulipae. The results of control pest experiments indicated that the Abamectin was superior in reducing the wheat miteA. tulipae(79% reduction) compared to Sulphur and Antimite which had approximately equal reductions (67 and 65% reductions, respectively). The study ended with the conclusion that the population of the wheat miteA. tulipaewas significantly highest at the interval from the mid of March to the mid of April. The wheat miteA. tulipaeis considered to be disastrous as its intrinsic rate of increase (rm) is high and the best control of this species at this interval was attained with Abamectin. [ABSTRACT FROM AUTHOR]

Aceria tulipaeis one of the most damaging mite pests of garlic in the Gangetic Basin of West Bengal. The mite causes damage by infesting along the midrib of leaf. The leaves of infested plants are curled and twisted in a characteristic manner, and growth is stunted, causing 32% yield loss in this study under West Bengal conditions. The mite causes devastating damage to stored garlic also. Mite population initiated at the end of December and attained maximum numbers during mid-February. The garlic cultivar, Katki, was recorded as tolerant, whereas Goldana was susceptible to the mite attack. Ambient temperature and relative humidity were positively correlated with the mite population, whereas rainfall was correlated negatively. [ABSTRACT FROM PUBLISHER]

The article presents a reprint of the article "Wheat Spot Mosaic, Caused by a Mite-Transmitted Virus Associated With Wheat Streak Mosaic," by John T. Slykhuis, which appeared in the periodical "Phytopathology." A study was conducted in which spot mosaic virus was isolated from wheat plants which showed chlorotic mottle in field. It highlights that how the mite aceria tulipae has the ability to survive and increase on grass.