Intrinsic Toxicity of Some Insecticides to Egg Parasitoid Trichogramma chilonis (Hym. Trichogrammatidae)

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Effects of 7 pesticides on Trichogramma chilonis adults were tested. Of all, two pesticides (Batillus thuingiensis and Oxadiazine) caused 10% and 20% mortality after 6-hour treatment and 95% and 75%, respectively, after 24-hour treatment. These were classified harmless for the first 6 hour period of exposure to pesticide but were categorized harmful and slightly harmful after 24 hours and fell into toxicity classes 4 and 2 respectively. All other preparations (Abamectin, Chlorfenapyr, Endosulfan, Profenofos and Spinosad which caused 100% mortality after 24 hours), were selected for further testing.