Author(s):

Meenakshi Kumari, AK Dubey, SG Rao and SS Solankey

Abstract: The present study was undertaken on thirty two okra genotypes along with two checks for screening against okra yellow vein mosaic virus (OYVMV) in open field condition in rainy season. Viruses play major constraints to okra production as it is susceptible to at least 19 plant viruses, among these viruses, yellow vein mosaic virus (YVMV) causes significant losses in the okra production causing yellow vein mosaic disease. The disease pressure of OYVMV was high in rainy season crop because of high humidity and rainfall along with more multiplication of whiteflies. Infection of 100% plants in a field is very usual and yield losses range from 50 to 94%, depending on stage of crop growth at which infection occurs and its vector whitefly (Bemisia tabaci Gen.). These genotypes were screened and evaluated in open field conditions in rainy season of 2017. Of the 32 genotypes none of the test genotypes showed immunity against OYVMV disease incidence and white fly population. Response of these genotypes towards OYVMV disease shows variability on the basis of their comparisons to each other. The genotype (IIVR-11) was found highly resistant and Kashi Kranti, 135-10-1, EC-169459 were found resistant. Seven genotypes exhibited moderately resistant reaction against YVMV while nine genotypes showed moderately susceptible, however only two genotypes IC-69304 and IC-282240 show susceptible and genotype Pusa Sawani exhibited highly susceptible to YVMV.

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