Abstract:

Results about research of wheat aphid in past year and dynamic monitoring of main natural enemy for controlling wheat aphid and protecting ecological environment showed that, natural enemy appeared following with the peak of target pest and wheat aphid. It had little control effects on wheat aphids by natural enemy under normal conditions. Many models were studied, such as complex agricultural-forest ecosystem association model, interval planting connected plants to continue the food train model and breeding parasitoids for the complement of natural enemy quantity in field, et al. The result showed that these model had obvious effect on attracting ladybird spawning in early spring, ladybird, aphid parasitoids and Aphid appeared synchronously, extending niche breadth of natural enemy and the migrating and overwintering of natural enemy. Biological technology, for instance protecting lady beetles, releasing aphid parasitoids and spraying bulg mold, which could control the harmful of wheat aphid, overcome pests harmed for the second time, and it had major role on protecting ecological environment.