COTTON BOLLWORM Helicoverpa armigera: CONTROL BY BIORATIONAL INSECTICIDES

The present work was devoted to study the impact of some recent insecticides pertaining to biorational insecticides group that have low mammalian toxicity i.e, [chlorantraniliprole, spinetoram, methoxyfenozide, thiamethoxam and lambda-cyhalothrin]which were sprayed individually and/or mixed with each other against the American bollworm (ABW) Helicoverpa armigera during the consequent growing cotton seasons of 2014 and 2015 at Al Zeiny - Abohoms, El-behaira Governorate, Egypt. Results of the study showed that the admixed different compounds [ Voliam Flexi® 40 WG (Chlorantraniliprol 10%+ Thiamethoxam 20 %), Engeo® %24.7 SC (Thiametoxam 14,1%+ Lambda-cyhalotrina 10,6%), Radiant® 12% SC (Spinosyn JL) and Runner® 24% SC (methoxyfenozide)] gave the highest efficient activity upon the population of H. armigera larvae. It could be also said that, the mixing of each of these different compounds together had a strong effect on the annihilation of the population of ABW H. armigera larvae more than their use individually.