Relative Toxicity of Some Insecticides Against Ailanthus Defoliator, Atteva fabriciella Swed. (Lepidoptera: Yponomeutidae)

Key Points

• The aim is to evaluate the relative toxicity of different insecticides against Atteva fabriciella larvae.
• Tested six insecticides: two synthetic pyrethroids, three organophosphates, and one neem extract.
• Evaluated toxicity specifically on last instar larvae of Atteva fabriciella.
• Established a comparative order of toxicity rankings among the insecticides.
• Cypermethrin was the most toxic, being 17.965 times more effective than malathion.
• Toxicity order was cypermethrin > monocrotophos > acephate > malathion > neem extract.
• The effectiveness of each insecticide varied significantly when applied to the larvae.