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Studies on Gram Pod Borer, Helicoverpa armigera (Hub.) on Chickpea and its Control with Insecticides and Biopesticides

KrishiKosh

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Title Studies on Gram Pod Borer, Helicoverpa armigera (Hub.) on Chickpea and its Control with Insecticides and Biopesticides
 
Creator Chejara, Babita Kumari
 
Contributor Veda, O.P.
 
Subject Entomology
 
Description ABSTRACT

The present research experiment entitled: “Study the effect of different insecticides with plant growth regulators on Helicoverpa armigera (Hubner) in chickpea” was conducted during rabi season 2012-13 at breeding farm, Adhartal college of Agriculture, JNKVV Jabalpur (M.P.).The research experiment was analyzed in a R.B.D. design. The research experiment studied on population dynamics, per cent parasitization and control of the gram pod borer with some insecticides with plant growth regulators.
To record the population dynamics of pest, weekly observations on larval population were made on per mrl. The early instar larvae of H. armigera were observed on chickpea plants during 52nd (fifth week of December 2012), at vegetative stage of the crop (0.20 larva/mrl). Pest activity continued till 13th SW (fifth week of March, 2013) i.e. maturity of the crop. Maximum (2.93) larvae/mrl were observed during 8th SW. Thereafter gradual decreasing trend in larval population was observed. Significant positive correlation between Helicoverpa armigera larval population and minimum temperature, rainfall, Vapour pressure morning and evening, (0.667, 0.608, 0.992 and 0.806) was observed.
In natural per cent parasitization studies only one species of parasitoid Campoletis chlorideae was found to parasitize on Helicoverpa armigera on chickpea. The peak per cent parasitization (35 %) was recorded in the month December, 2012 (5th SW) at vegetative stage of crop. The minimum per cent parasitization (10 %) was recorded two times in the 6th SW (2nd week of February 2013) and 13th SW (5th week of March 2013).
All the insecticidal treatments proved to be effective in reducing overall larval population, chlorantraniliprole performed best recording lowest population (0.61 larva/mrl), followed by NAA + Chlorantraniliprole, Flubendiamide, Emamectin benzoate, NAA + Indoxacarb, Indoxacarb, NAA + Flubendiamide, NAA + Profenophos, NAA + Emamectin benzoate and Profenophos (0.69, 0.72, 0.81, 0.87, 0.88, 0.92, 0.93, 0.96 and 0.97 larva/mrl) respectively. Where as NAA + Urea treated plots recorded higher larval population i.e. (2.42 larvae/mrl). The untreated control recorded significantly highest larval population (4.09 larvae/mrl).
The lowest larval population, highest seed yield, maximum net return and highest B:C ratio was recorded in that treatments hence to control the Helicoverpa armigera pest Chlorantraniliprole, NAA + Chlorantraniliprole, Flubendiamide Emamectin benzoate and Indoxacarb can be recommended.
 
Date 2016-08-17T14:30:58Z
2016-08-17T14:30:58Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/72790
 
Language en
 
Format application/pdf
 
Publisher JNKVV