Ecological management of the cotton bollworm in Xinjiang

Since 1993，Xinjiang Uygur Autonomous Region located in the north-western China has become the largest cotton producing province in China．There is an urgent need for a new strategy for control of the contton Bollworm ．Helicoverpa armigera(Hubner)，because of its severe damage and control failures The authors introduce a concept of ecological pest management(EPM)strategy，report a pilot demonstration of the strategy resulting in a decrease，in damaged boll percent，from 20％ to 3％ in the region during 1997～1999．and discuss the factors of technique and implementation of EPM which need to be incorporated into the strategy in the near future.