Diversity of Biological Agent Populations Under Both of Pesticides and Bio-Control Applications of Cotton Fields

Influence of certain pesticides Spinosad, Avermectin, Agreen (Bacillus thrungiensis) and Acetamprid on the entomo-phagous complex were studied on cotton eco-system in cotton fields. Value of diversity and equitability were calculated to clarify the way of distribution and relative abundance of systematic groups after application of insecticides. Results suggested that Spinosad, Agreen and Avermectin having toxic effect on bollworms with little effect on beneficial insects in cotton fields. Spinosad and Agreen gave the highest effect. Results also, relected the tendency of Spinosad and Agreen for selectivity when compared with the other insecticides.