Journal of Biological Control

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Effect of Insecticides on Some Biological Parameters of Trichogramma chilonis Ishii (Hymenoptera: Trichogrammtidae)


Affiliations
1 Department of Entomology, Chaudhary Charan Singh, Haryana Agricultural University, Hisar 125 004, Haryana, India
 

Bioassay carried out to determine the toxicity of seven insecticides (viz. endosulfan 0.07%, imidacloprid 0.004%, spinosad 0.01%, triazophos 0.08%, thiodicarb 0.075%, novaluron 0.01% and azadirachtin @1ml/L) to Trichogramma chilonis showed that spinosad was the most toxic in all the studies followed by triazophos. Spinosad resulted in only 17.80 per cent parasitization and 3.97 per cent adult emergence from the host eggs, Corcyra cephalonica Stainton treated before parasitization. Novaluron was found to be the safest resulting in 58.93 per cent parasitization and 89.72 per cent adult emergence from the host eggs treated before parasitization. The parasitization in other insecticides ranged from 20.00 to 40.47 per cent. Spinosad was also found highly toxic to all the immature stages of T. chilonis resulting in only 0.46, 0.66 and 0.65 per cent adult emergence when the parasitoid was treated in the egg, larval and pupal stages, respectively. Novaluron was found to be safe to all the immature stages of the parasitoid resulting in 86.75, 87.84 and 87.46 per cent adult emergence when treated in egg, larval and pupal stages, respectively. The parasitoid adult emergence in other insecticides ranged from 57.95 to 88.63 per cent when treated in egg stage, 53.97 to 87.12 per cent when treated in larval stage and 61.46 to 87.15 per cent when treated in pupal stage.

Keywords

Parasitization, Adult Emergence, Insecticides, Trichogramma chilonis.
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  • Effect of Insecticides on Some Biological Parameters of Trichogramma chilonis Ishii (Hymenoptera: Trichogrammtidae)

Abstract Views: 334  |  PDF Views: 123

Authors

G. Narendra
Department of Entomology, Chaudhary Charan Singh, Haryana Agricultural University, Hisar 125 004, Haryana, India
Sucheta Khokhar
Department of Entomology, Chaudhary Charan Singh, Haryana Agricultural University, Hisar 125 004, Haryana, India
Pala Ram
Department of Entomology, Chaudhary Charan Singh, Haryana Agricultural University, Hisar 125 004, Haryana, India

Abstract


Bioassay carried out to determine the toxicity of seven insecticides (viz. endosulfan 0.07%, imidacloprid 0.004%, spinosad 0.01%, triazophos 0.08%, thiodicarb 0.075%, novaluron 0.01% and azadirachtin @1ml/L) to Trichogramma chilonis showed that spinosad was the most toxic in all the studies followed by triazophos. Spinosad resulted in only 17.80 per cent parasitization and 3.97 per cent adult emergence from the host eggs, Corcyra cephalonica Stainton treated before parasitization. Novaluron was found to be the safest resulting in 58.93 per cent parasitization and 89.72 per cent adult emergence from the host eggs treated before parasitization. The parasitization in other insecticides ranged from 20.00 to 40.47 per cent. Spinosad was also found highly toxic to all the immature stages of T. chilonis resulting in only 0.46, 0.66 and 0.65 per cent adult emergence when the parasitoid was treated in the egg, larval and pupal stages, respectively. Novaluron was found to be safe to all the immature stages of the parasitoid resulting in 86.75, 87.84 and 87.46 per cent adult emergence when treated in egg, larval and pupal stages, respectively. The parasitoid adult emergence in other insecticides ranged from 57.95 to 88.63 per cent when treated in egg stage, 53.97 to 87.12 per cent when treated in larval stage and 61.46 to 87.15 per cent when treated in pupal stage.

Keywords


Parasitization, Adult Emergence, Insecticides, Trichogramma chilonis.

References