Effects of Nitrogenous Fertilization and some Insecticides on the Natural Enemies of Transgenic Bt Cotton Pests

Field assessment of integrated management BT cotton pests was carried out in two consecutive seasons; 2016/2017 and 2017/2018 the experimental research farm Kassala University, Sudan. Four insecticides (imidacloprid, abamectin, profenofos, lufenuron) from different chemical groups with a mode action three levels (43.81 kgha-1, 87.62 131.43 kgha-1) soil-applied nitrogen were tested IPM package. Insecticides applied at recommended doses. A total 7 weekly counts prevailing natural enemies [Chrysoperla carnea (Stephens) Aenasius bambawalei Hayat] for 4 weeks before spraying 3 post starting 3rd week spraying. Results indicated that level exerted no significant effects on populations enemies; C. A. bambawalei. Based average spray percentage reduction over control, all insecticide treatments significantly reduced population enemies. Imidacloprid profenofos highest followed by abamectin lufenuron (56.03, 48.25, 07.78 06.61% respectively) first season, while imidacloprid, lufenuron, induced reductions (55.94, 45.05, 17.57 17.33% second season. On other hand, (abundant season 1 only) order; abmectin, (03.95, 02.63, 202.63, 01.32%, respectively). Interactions between fertilization not as measured