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根据长江流域棉区红铃虫为害损失和防治指标协作研究的结果,肯定了一代红铃虫为害的虫害花.对棉株结铃数及成铃结构无影响,不必进行防治;二代以当日百株卵量60—80粒,三代以当日百株卵量190—250粒为防治指标,除在大渡口基点上进一步试验验证外,今年扩大到宿松、东至、怀宁、棕阳、桐城五县进行大面积示范验证,现将示范验证结果小结如下:
According to the collaborative research results of red bollworm loss and control index in the cotton area of the Yangtze River Basin, it affirmed the pest flower infested by the red bollworm and had no effect on boll number and boll structure of the cotton plant, Hundreds of ovules 60-80, three generations to the day of a hundred eggs 190-250 as a prevention and control index, in addition to the Dadukou basis point further experimental verification, this year expanded to Susong, east, Huaining, Tongcheng five counties to conduct large-scale demonstration verification, the demonstration verification results are summarized as follows: