The field population dynamic and optimum control period of wheat aphids in Chaoyang Region, Liaoning.
Author of the article:LI Xue-Jun，WANG Shu-Xian，ZHENG Guo
Author's Workplace：(Insitute of Entomology， Shenyang Normal University， Shenyang 110034, China)
Key Words：wheat aphids; growth and decline law; optimum control period
Abstract：Statistical analysis of the field population research data from 1991 to 2001 in Chaoyang Region revealed that under the conditions without pesticide application wheat aphids showed five stages in the field population fluctuation course distinctly. The pop