TOXICITY OF SOME PESTICIDES AGAINST THE EGG STAGE AND THE 1ST LARVAL INSTAR OF THE CHRYSOPID PREDATOR CHRYSOPERLA-CARNEA (STEPH)

The toxicity of cypermethrin, deltamethrin, fenpropathrin, fenvalerate, methomyl and kelthane-s against the egg stage and the 1st larval instar of Chrysoperla carnea (Steph.) revealed that deltamethrin exhibited magnitude bad side effects against the eggs (LC90 = 3.35 ppm) as compared with the safest compound kelthanes (LC90 = 144 ppm); the figures of the other tested toxicants ranged between 17.6 and 109.2 ppm. It was found that the larval stage needed higher concentrations to achieve similar mortality percentages. LC90 values ranged between 72.2 and 1,176 ppm. Ranking of toxicity was, however, similar to that of ovicidal action.