Abstract: The Xinxiang Cotton IPM Demonstration Area, locating at Xinxiang County, Henan Province, was established by IPP, CAAS since 1986. A complete set of key technique system of cotton IPM was gradually developed and fulfilled after plenty field tests were conducted by the entomologists of IPP. This cotton IPM system has experienced the unprecedented outbreak of cotton bollworm Helicoverpa armigera (Hübner) in 1992 and 1993; its serious damage had been effectively controlled in this demonstration area. Until 1994, the accumulated area of direct demonstration areas had increased up to nearly 0.5 million ha scattered in 18 cotton producing provinces, and significant economic and social benefits were obtained. Owing to the achievement mentioned above, the awared research group has got a third class national award in the progress of science and technology in 1996 endowed by the Chinese government. The main contents of this achievement are as follows: (1) The effects of H. armigera in different generations on cotton were clarified, from these, a new control tactics was formulated as: “to monitor and forecast population dynamics in first generation; to protect cotton plant tip in second generation; to prevent the damage of cotton square in third generation; to ensure the safety of cotton boll in fourth generation”. (2) It was confirmed for the first time that to inspect the density of 1st generation larvae on wheat ear by sweeping net, for predicting the population dynamics of 2nd generation larvae on cotton plant more than 20 days ahead of time, the accuracy attained to more than 90%. (3) The action thresholds of cotton bollworm in 2nd and 3rd generations at different soil fertility levels were studied and determined. (4) The appraisal standards and method for resistance of cotton to H. armigera were laid down, more than 10 cotton lines possessing high resistance, high yield and high quality characteristics were selected. (5) The life tables of cotton bollworm in different generations were researched and analyzed, the key factors affecting its population dynamics were determined. (6) The resistance of cotton bollworm to main chemical insecticides were monitored systematically, the bio-chemical and physiological mechanisms were analyzed, and the management strategies of chemical resistance were implemented in demonstration area.Since the growing of Bt transgenic cotton has been nearly popularized in China so far, the originally important insect pests such as cotton bollworm and pink bollworm have become secondary ones, while the damage of non-target sucking insect pests increase obviously. In this paper, the monitoring of resistance in H. armigera population to Bt transgenic cotton, the reasonable crop distribution for relieving increase of resistance in field, and further studies on the bionomics and control tactics of non-target insect pests were briefly discussed.

Key words: Cotton bollworm , Cotton IPM demonstration , Resistance monitoring , Non-target insect pests , Management