Studies of the Effect of Insecticides on Trichogramma achaeae Nagaraja and Nagarkatti (Hymenoptera: Trichogrammatidae)

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Authors

  • Department of Entomology, Punjab Agricultural University, Ludhiana ,IN
  • Department of Entomology, Punjab Agricultural University, Ludhiana ,IN
  • Department of Entomology, Punjab Agricultural University, Ludhiana ,IN

DOI:

https://doi.org/10.18311/jbc/1988/15351

Keywords:

Trichogramma achaeae, Insecticide Susceptibility.

Abstract

The effect of 15 insecticides used in one or the other time in cotton on the susceptibility and emergence of Trichogramma achaeae Nagaraja and Nagarkatti was studied under laboratory conditions. All the insecticides except fenvalerate gave 100 per cent mortality. Maximum parasitism was observed when the unparasitized eggs of Corcyra cephalonica (Stainton) were treated with permethrin, oxydemeton methyl and fenvalerate. When the insecticides were tested on parasitized eggs, it was found that fenvalerate, permethrln, oxydemeton methyl, DDT, dimethoate, deltamethrin and phosphamidon were comparatively safe to this parasitoid. Emergence of parasitoids was significantly affected in 1 and 2 day-old parasitized eggs. Emergence in all the insecticidal treatments was significantly reduced.