The Control of Cotton Bollworm Population by its Dominant Natural Enemy Complexes
棉田优势天敌对棉铃虫种群的控制作用

The interaction between the predatory natural enemies and cotton bollworm was studied in caged conditions.The dominant natural enemy species were O.similis,L.axyridis,P.japonica, on the stage of egg,O.similis,P.japonica,L.axyridis,D.fimbriatoides, on the stage of 1~2 instar,Misumenopos tricuspidata,P.japonica,L.axyridis,D.fimbriatoides,on the stage of 3~6 instar.Each species and cotton bollworm(Helicoverpa armigera) were tested in their coexistent systems in caged cotton field.The interaction were analysed by some tests of loss-faulty,significance and regression coefficient.