Abstract:

The effects of three kinds of bio-insecticides, Aolu No.1, Abamectin and Bt on arthropod community in autumn cabbage fields were studied in this paper. The results showed that each of the three tested bio-insecticides had evident control effects on the major insect pest, Prodenia litura in autumn cabbage fields. Each of the three tested bio-insecticides had some short period effects on species richmmunity diversity. It was the best bio-insecticide in the three tested bio-insecticides for the control of insect pests in autumn caness of arthropod community in autumn cabbage field. Abamectin and Bt had some effects on the community diversities. Aolu No.1 increased evidently the community evenness and had no evident effects on the cobbage fields.