Ten insecticides organophosphorus and four carbamate compounds were
tested against adult stages of the cotton aphid Aphis gossypii Glover collected from
eight Egyptian Governorates at the early of cotton growing season 2004.The results
showed that there are tow lists of toxicity in the Governorates tested: In the first list, Marshal was the most toxic in four Governorates followed by
lannate, Dursban, Selecron and Curacr m. While Aphox was the least toxic followed
by Cyanox, Malathion and Cygon, but Larvin did not test in this Governorates. In the second list, Dursban was the most toxic followed by Marshal in four other
Governorates, then lannate, Selecron and Curacron, but Larvin was the least toxic
insecticides followed by Aphox, Cyanox, Malathion and Cygon. In general, results showed that Marshal and Dursban were the most toxic
effects on A. gossypii followed by Lannate or Selecron then Curacron. While Larvin
and Aphox were the least toxic effects followed by Cyanox, Malathion and Cygon.