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CURRENT STATUS OF INSECTICIDE RESISTANCE IN THREE IMPORTANT NOCTUID PESTS OF GUNTUR DISTRICT

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Title CURRENT STATUS OF INSECTICIDE RESISTANCE IN THREE IMPORTANT NOCTUID PESTS OF GUNTUR DISTRICT
 
Creator BHASKAR KUMAR, P
 
Contributor RAJA SEKHAR, P
 
Subject CURRENT, STATUS, INSECTICIDE, RESISTANCE, THREE, IMPORTANT, NOCTUID, PESTS, GUNTUR DISTRICT
 
Description Studies were conducted to determine the degree of resistance
acquired by Helicoverpa armigera (Hubner) Spodoptera litura
Fabricius and Spodoptera exigua (Hubner) to endosulfan,
monocrotophos, methomyl and deltamethrin and to understand the
effect of host crops on the susceptibility of test insects to above
insecticides.
H. armigera population from the four major host crops viz.,
cotton, pigeonpea, chickpea and tomato differed in the degree of
resistance to four test insecticides. The H. armigera population
from cotton showed 7.1, 2.68, 9.16 and 235.7 fold and tomato
collected population exhibited 3.75, 1.41, 6.70 and 95.64 fold
resistance to endosulfan, monocrotophos, methomyl and
deltamethrin, respectively at LD50 in comparison with the baseline
data. The population from pigeonpea and chickpea acquired
resistance levels which were in between cotton and tomato.
The S. litura population acquired highest resistance levels
for groundnut fed larvae against all test insecticides than
blackgram. The groundnut population acquired 2.12, 1.43, 1.55 and
80.1 fold resistance to endosulfan, monocrotophos, methomyl and
deltamethrin, respectively.
S. exigua population collected from chillie showed 10.5,
10.42, 3.72 and 39.8 fold resistance to endosulfan, monocrotophos,
methomyl and deltamethrin which was more than onion collected
population at LC90.
Host crops exhibited profound influence on susceptibility of
H. armigera larvae to insecticides. Cotton fed larvae were found
less susceptible to all test insecticides than chickpea, pigeonpea
and tomato and the order of susceptibility to test insecticides was
tomato > chickpea > pigeonpea > cotton. In case of S. litura, the
larvae fed on groundnut were more tolerant to all the insecticides
tested followed by blackgram fed larvae. Regarding S. exigua, the
larvae reared on chillies were found to be more tolerant to all the
test insecticides over the onion fed larvae.
 
Date 2016-08-20T10:35:50Z
2016-08-20T10:35:50Z
2004
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/73110
 
Language en
 
Relation D7638;
 
Format application/pdf
 
Publisher ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD