Title: DETERMINATION OF TOXICITY OF DIFFERENT INSECTICIDES AGAINST Callosobruchus chinensis UNDER LABORATORY CONDITION.
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Date
2022-07-30
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Publisher : Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
Abstract: The present investigation entitled “Determination of toxicity of different insecticides against Callosobruchus chinensis under laboratory condition” was conducted in insect toxicology laboratory of Department of Agricultural Entomology, Post Graduate Institute, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, during the year of 2020-21 with objective to develop homogeneous population and from that to evaluate relative toxicity of different insecticide molecules viz., spinosad 45 % SC, chlorpyriphos 20% EC, chlorantraniliprole 18.5 % SC and check deltamethrin 2.8 % EC against pulse beetle, C. chinensis on the basis of percent adult mortality at 24, 48 and 72 hours after treatment (HAT). The bioassay was conducted by impregnated filter paper method with five concentrations of each four treatments including control and replicated thrice.
Bioassay studies indicated that among the tested insecticide molecules spinosad 45 % SC showed best efficiency at both LC50 and LC90 and it was more toxic than other insecticides at 24, 48 and 72 hours of exposure. The LC50 value of spinosad 45 % SC to the adult of C. chinensis were 0.011, 0.009 and 0.007 ppm while LC90 value were 0.035, 0.029 and 0.019 ppm at 24, 48, 72 hours after treatment (HAT), respectively. The log concentration probit (lcp) line slope (b) values of spinosad 45 % SC were 2.625, 2.638 and 3.084 at 24, 48 and 72 HAT, respectively. The relative toxicity of spinosad 45 % SC, chlorpyriphos 20 % EC, chlorantraniliprole 18.5 % SC and deltamethrin 2.8 % EC were 1.6363, 0.2117, 0.5000 and 1.0000 at 24 hours, 1.1111, 0.2083, 0.4347 and 1.0000 at 48 hours, 1.1428, 0.2285, 0.4444 and 1.0000 at 72 hours of exposure, respectively. The insect mortality and toxicity of insecticides increase marginally at 48 hours and then at 72 hours after exposure.
Description
Description: The experiment was carried out on the Insect toxicology laboratory, Department of Entomology, PGI, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, during the year 2020-21 with view to study the toxicity of different insecticides on pulse beetle and to work out the effective and economic treatment for management of pulse beetle. The different insecticides used in present investigation comprised of spinosad 45 SC, chlorpyriphos 20 EC, chlorantraniliprole 18.5 SC, deltamethrin 2.8 EC and Control (water). The mortality count of insects in three replications of each concentration was calculated. The dose mortality regressions were computed by probit analysis and the relative toxicity of different insecticides was calculated by taking deltamethrin as standard check.
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Citation
Citation: PAWAR, SACHIN SHESHARAO. (2021). Determination of toxicity of different insecticides against Callosobruchus chinensis under laboratory condition. Department of Entomology, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2021. Print. xiii, 56p. (Unpublished).