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河北省肥乡县从1979年开始由点到面开展试验、示范棉虫综合防治技术的试验和示范,面积由780亩发展到1981年的20800亩。应用综防的治虫投资和防治效果均比化学防治有明显的改变。示范区内的南谢堡大队780亩棉田,1979年综防投资由综防前的每
Hebei Province, Feixiang County started from point to surface in 1979 to test and demonstrate the comprehensive prevention and control technology of cotton insects test and demonstration area from 780 acres to 20800 acres in 1981. Application of integrated control of pest control and prevention and treatment of chemical control have significantly changed. In the demonstration area, there are 780 acres of cotton fields in the South Fort Fort Brigade