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通过对麦田天敌消长规律的调查分析,从害虫防治和天敌利用的角度出发,提出天敌的最低利用指标,并作为划分天敌发生盛期的依据。同时提出用天敌高峰日发生量和发生盛期天数、后期网捕天敌量作为划分天敌发生程度的指标,并在麦田天敌监测资料统计中进行了具体应用。
Based on the investigation and analysis of the natural enemies of wheat field, the minimum utilization index of natural enemies was proposed from the viewpoints of pest control and natural enemies utilization and used as the basis for the division of natural enemies. At the same time, it is proposed to use the peak days of natural enemies and the number of days of peak occurrence, and the amount of natural enemies of late net catches as an indicator of the degree of occurrence of natural enemies. The data were also used in the statistics of natural enemies in wheat field.