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Studies on Management of Major Lepidopteran Pest of Soybean

KrishiKosh

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Title Studies on Management of Major Lepidopteran Pest of Soybean
 
Creator Dhanraj, Paliwal Gaurao
 
Contributor Shrivastava, S.K.
 
Subject Entomology
 
Description ABSTRACT
The present research experiment entitled “Studies on management of major lepidopteran pests of soybean” (Glycine max (L.) Merrill was carried out in the experiment field of Department of Plant breeding and genetics, Adhartal, JNKVV, Jabalpur (M.P) during kharif season 2012-13, with objectives like seasonal incidence of lepidopteran defoliators and their natural enemy, screening of genotypes/varieties and bio-efficacy of entomopathogenic microbes against Tobacco caterpillar, Spodoptera litura Fabricius on soybean which ultimately help to develop strong IPM strategies. The results obtained are as follow.
The infestation of the Chrysodeixis acuta started in the 29th SW (Third week of July) with an average of 0.35 larvae/mrl. Influence of rainfall on Chrysodeixis acuta was negative. The infestation of the Spodoptera litura started in the 34th SW (Fourth week of August) with an average of 0.71 larvae/mrl. Influence of rainfall and evening relative humidity on Spodoptera litura was negative. The incidence of Spilosoma obliqua started in the 36th SW (First week of September) with an average of 0.32 larvae/mrl. Influence all abiotic factors on Spilosoma obliqua did not exhibit significant influence. Natural enemy, Spider also appeared along with insect pest from 29th SW (Third week of July) with an average population of 0.55 Spider/mrl. Influence of evening relative humidity on spider was negative. Whereas other abiotic factors did not exhibit significant influence.
On the basis of larval population and Per cent defoliation, Genotypes JS 20-88, JS 20-53, JS 20-82 and JS 20-89 consider as resistant against these defoliators as compared to rest of the genotypes which were on par with susceptible check JS 97-52. Five genotypes viz, JS 20-53, JS 20-79, JS 20-86, JS 20-89 and JS 20-91 were rated as susceptible high yielding i.e. tolerant to insect pests and rest of the genotypes were rated as susceptible low yielding.
On the basis of larval mortality, pupation percentage, larval and pupal period of Spodoptera litura, genotypes/varieties JS 20-88, JS 93-05, JS 20-53, NRC-37 and JS 20-89 consider as resistant against Spodoptera litura as compared to rest of the genotypes.
Under laboratory condition Metarhizium anisopliae@ 1 x 1012 spores/ml and Beauveria bassiana DOR strain@ 1 x 106 spores/ml were found to be most effective against 3rd instar larvae of Spodoptera litura in comparison to rest of the entomopathogenic microbials.
 
Date 2016-08-17T12:00:20Z
2016-08-17T12:00:20Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/72725
 
Language en
 
Format application/pdf
 
Publisher JNKVV