TOXICITY EVALUATION OF SOME DIFFERENT PESTICIDES AGAINST COTTON LEAFWORM Spodoptera littoralls (BOISD) AND APHIDS Aphis gossypli (GLOV.) UNDER LABORATORY CONDITIONS

Laboratory expennients were conducted to determine the efficiency of
different pesticides belonging to various biological and synthetic chemical groups
against 2d instar larvae of cotton leefworm Si?tor&is ( Boisd) and Aphis gossypii
(Glover).
Results revealed that LC50 and toxicity index of the tested compounds
against 2d instar taivae of cotton leafworrn were (1.544.17 and 10.55 ppm) and (
100, 36.88 and 14.56 % ) for Betacyfolathrin, Fenpropethon and EsFenvolerate,
respectively. Although for the Bío-cornpounds, Spinosad and Abamactin the obtained
values of the two tested compounds were 21.40 and 150.88 ppm )and(lOCand 14.18
% ) respectively.
In case of Aphids pest values of LC50 and toxicity index were (0.015, 0.026,
0.042, 0.171, 0.29 and 0.503 ppm) and (1001 57.69, 35.71, 877, 5.17 and 2.98 %),
for Beta-Cyofiathrin, Es-Fenvolerat, Chioropyrilos, Profenfos, Fenpropathrin, and
Methomyl, respectively, while ¡t were (17.51 2, 68.522 and 0.156 ppm ) and (100, 0.89,
and 0.23) for Beeuvena basaana ,Abamectin and Spinosad biocides, respectively.
Co-toxicity factors of the binary mixture of ( Beta-Cfoluthnn + Abamectin)
and ( Beta- Cyfoluthrin • Spinosad) at LCs levels against 2 instar larvae of cotton
iealworn and A.gossypì were ( - 28.57 and 100 ) and ( - 3714 and 72.97 )
respectively.