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简述了安庆棉区70年代以来棉铃虫发生的历史状况,较为详细地阐述了1992~1996年棉铃虫的发生特点。主要表现在:发生期早、发生量大、发生盛期长、发生范围广。分析自1992以来棉铃虫发生量回升,发生程度加重的原因,主要是农田生态条件改变,食料更加丰富,气候条件适宜,天敌控制作用削弱,棉铃虫抗药性发展致使高繁殖力的棉铃虫种群数量急剧增长。根据当地棉铃虫发生的特点及发生原因分析,提出控制棉铃虫为害的根本途径在于加强综合治理,大力推行行之有效的农业、生物和化学防治,强化统的功能,策略上3代防治重点为早发棉田,兼治其他棉田,4代全面防治,5代以中、晚熟棉田为防治重点。
The history of cotton bollworm in Anqing cotton area since 1970s was briefly described. The occurrence characteristics of cotton bollworm from 1992 to 1996 were described in detail. Mainly in: the early stage of occurrence, the occurrence of large, long peak occurs, the occurrence of a wide range. Analysis of the reasons for the increase of cotton bollworm occurrence since 1992, mainly due to the change of ecological conditions in farmland, more foodstuffs, suitable climatic conditions, weakened control of natural enemies and the development of resistance to H. armigera resulted in the development of population with high fecundity Rapid growth. According to the characteristics of the local cotton bollworm and its causes, it is proposed that the fundamental way to control the damage of cotton bollworm is to strengthen the comprehensive management, vigorously promote effective agricultural, biological and chemical control, and strengthen the functions of the system. Early cotton fields, and other cotton fields, 4 generations of comprehensive control, 5 generations to medium and late-maturity cotton fields as the focus of prevention and treatment.