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Integration of eco-friendly insecticides and bio-pesticides in management of pigeon pea pest complex

KrishiKosh

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Title Integration of eco-friendly insecticides and bio-pesticides in management of pigeon pea pest complex
 
Creator Mohapatra, Manaswini
 
Contributor Panda, S.K.
 
Subject Integration, eco-friendly, insecticides and bio-pesticides, management, pigeon pea, pest complex
 
Description Studies on Integration of eco-friendly insecticides and bio-pesticides for management
of pigeon pea pest complex was taken up at Central Farm, OUAT during 2012-13 with the
objective of identifying the most potent insecticide and to study the joint effect of Bacillus
thuringiensis (Bt) with other insecticides at half the recommended dose. Test molecules
comprised of Bt (1.0 kg/ha), Beauveria bassiana (2.5 kg/ha), azadirachtin (1.0L/ha),
flubendiamide (150 ml/ha), emamectin benzoate(250g/ha), indoxacarb (300ml/ha), cartap
hydrochloride(750g/ha) and cypermethrin (1.0 L/ha) either tested alone (first set of
experiment)or in combination with other test insecticides(second set of experiment). Pigeon
pea (variety- Upas120) trials were conducted in Randomized Complete Block Design with
three replications having 12 m2 plots and insecticides were sprayed thrice at flowering stage at
15 days interval.
Flubendiamide, indoxacarb along with Bt exhibited better control of pod borers
resulting in 0.22 to 0.92 larvae /twig and 7.09 to 8.89 % pod damage as against 1.54 to 2.24
larvae /twig & 15.4% in control. Emamectin benzoate and cypermethrin were second ranking
compounds for the borers. Azadirachtin, Beauveria bassiana along with flubendiamide,
emamectin benzoate and cypermethrin were found effective against the sucking pests like pod
bugs and leafhopper with a maximum of 1.68 bugs/twig and 2.74 hoppers/leaf compared to
3.69 bugs/twig and 3.34 hoppers /leaf in control.
Low insecticide doses mixed with Bt at half the recommended dose proved effective
against pod borers and reduced the borer damage significantly. Emamectin benzoate showed
synergistic action with Bt in controlling borers (0.38 larvae/twig) compared to untreated
check (1.69 larvae/twig). Flubendiamide and indoxacarb combined with Bt showed 87.64 and
80.63 % reduction in borer damage over control and proved highly efficacious against the
borers. On the other hand joint action of Bt with azadirachtin and Beauveria bassiana gave
good control of pod bugs and leafhopper and remained on par with Bt + cypermethrin (1.17-
2.07 bugs/twig and 0.93 to 1.82 hoppers /leaf) as compared to control (4.16 bugs/twig and
3.93 hopper/leaf ).
Highest grain yield was obtained from flubendiamide treated plots registering 65.72
% increase over control when tested alone but in combination with Bt, indoxacarb resulted in
highest yield with 75.76% increase over control.
From the entire investigation it can be concluded that flubendiamide and indoxacarb
either alone or in combination with Bt may be recommended to the farmers for effective pest
management in pigeon pea. Exclusively against pod bugs and leaf hoppers azadirachtin and
B. bassiana may be recommended without going for chemical pesticides.
 
Date 2017-01-04T15:28:41Z
2017-01-04T15:28:41Z
2015
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/94518
 
Language en
 
Relation Th;4383
 
Format application/pdf