Varietal evaluation and management of whitefly, Bemisia tabaci (Gennadius) in urdbean, Vigna mungo (L.) Hepper
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Date
2014
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Publisher
CCSHAU
Abstract
Twelve genotypes of urdbean were evaluated for resistance against whitefly,
Bemisia tabaci (Gennadius). Whitefly adult population was ranged from 6.27 to 50.47
adults/ cage on different genotypes. The genotype UH 1 and T 9 were found least
susceptible against whitefly having minimum number of whitefly adults, eggs, nymphs and
pupae. Maximum number of eggs, nymphs and pupae were recorded on UH 12-03, UH 12-
04, respectively. Morphological characters viz. leaf size, leaf thickness, glabracity, trichome
length have positive correlation with whitefly adults and immature stage. The biochemical
characters of only two genotypes (T 9 and UH 1) were calculated hence no correlation with
whitefly population was worked out. Though insecticides NSKE 5% alternated with
novaluron and NSKE 5% alternated with ethion were found to effective against adult
population, but maximum yield was obtained in plot sprayed twice with nimbecidine
(5ml/l). However, maximum cost benefit ratio was obtained in plot treated with dimethoate
(5ml/kg) followed by seed treatment with dimethoate alternated with one spray of
dimethoate and NSKE 5% alternated with spray of ethion.
Description
Keywords
Bemisia tabaci, Vigna mungo, Insecticide, Genotype