Response of sime selected insecticides on neuropteran predator (Chrysopa lacciperda0 of lac insect (Kerria lacca)
2009
Singh, J.P. | Jaiswal, A.K. | Monobrullah, MD | Bhattacharya, A.
Laboratory bioassay was carries out during 2008 to evaluate some insecticides against larval instar of lac insect predator (chrysopa lacciperda Kimmins) t develop suitable strategy for management of this serious neuropteran pest of Indian lac insect [Kerria lacca (Kerr)]. Seven safer insecticides viz lambdacyhalothrin, carbosulfan, spinosad indoxacarb, fipronil, alphamethirn and ethofenprox against lac insect, were evaluated for their bioefficacy against C. lacciperda Kimmins by topical application and exposing the insect on residual film of insecticides. Topical application of lambdacyhalothrin (0.005 and 0.008%) carbosulfan (0.02 and 0.03%), fipronil (0.005and 0.01%) alphamethrin (0.005 and 0.01% spinosad (0.02%), indoxacarb (0.02%) and ethofenprox (0.02%) exhibited 100% mortality of C. lacciperda within 24 hr of treatment. Fipronil (0.005 and 0.01%) and indoxacarb (0.02%) were found to be equality effective as cent mortality was observed within 24 hr of treatment with both modes of treatment. In most of the treatment topical application of insecticides was found to be more effective as compared to exposure of insect on residual films. Hence, lambdacyhalothrin, carbosulfan, indoxacarb, spinsad, fipronil, alphamethrin and ethofenprox can be incorporated in IPM programmes while formulating strategy for effective management of this neuropteran predator of lac insect without having any adverse effect on lac insect. Fipronil is highly water soulable and hence may be cautiously used. Supervisory control of predators of lac generally recommended.
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