Impacts of three insecticides on wheat aphids and their natural enemies in wheat field.
Author of the article:LIU Ai-Zhi，LI Su-Juan，LI Shi-Gong et al.
Author's Workplace：(Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou450002,China).
Key Words：insecticides; wheat field; wheat aphids; natural enemies
Abstract：Impacts of three insecticides on wheat aphids and their natural enemies in wheat field were analysed. The results showed that the insecticides had an excellent controlling effect on wheat aphids and were safe to natural enemies; and the ratio of ladybird