The effectiveness of some non-traditional materials as pesticides to eggs and larvae of cotton leaf worm (Bosid.) [electronic resource].

Includes references.

Cotton leaf worm is one of the most important insect pests infesting different varieties of vegetable as well as field crops. Non-conventional insecticides are the promised and used as the alternative agents of traditional pesticides especially in the Integrated Pest Management (IPM) programs. Under laboratory conditions six of these agents plus the carbamate insecticide; methomyl ; were tested against the 48 hours aged eggs as well as the 2nd instar larvae of the cotton leaf worm using both dipping and feeding bioassay techniques, respectively. Based on the LC50 values, emamectin benzoate showed the most effective insecticide as ovicidal and larvicidal action, while jojoba oil showed the least efficient one. The toxicity of the tested compounds could be descendingly arranged as ovicidal action as follows: emamectin benzoate > azadirachtin > methomyl > spinetoram > spinosad > abamectin> jojoba oil. Whereas, the trend of these agents as larvicidal action was emamectin benzoate>methomyl > spinetoram > abamectin >spinosad > azadirachtin > jojoba oil. Emamctin benzoate and azadirachtin have more ovicidal potent effect than spinetoram by 12, 2 fold respectively. Key words ovicidal, larvicidal, non-conventional agents, Spodoptera littoralis.

Summary in Arabic.

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