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应用敌敌畏毒土田间熏蒸以防治棉红铃虫,是根据把毒土撒到棉田后,敌敌畏很快挥发成气体,扩散成一个熏蒸层而熏杀红铃虫成虫的原理进行的。江苏省南通地区农科所从1971年开始用这个方法进行防治试验,几年来防治面积不断扩大,至1974年已在全区54个公社和南通市郊区8万多亩棉田上示范应用。四年的实践证明,使用敌敌畏毒土熏蒸防治红铃虫,具有以下几个优点:①效果好。据他们的试验示范结果,使用这种方法防治红铃虫与喷液防治比较,铃害率下降38.1—45.7%,单铃虫道下降67.7—68.2%,百铃卵量下降61.9%,百朵籽棉含虫量下降50%。因此,皮棉品质大大提高。据如东县环镇公社在红铃虫二、三代期进行全面熏蒸
The application of dichlorvos poisonous soil fumigation in the control of pink bollworm is based on the soil sprinkled into the cotton field, dichlorvos quickly volatilized into gas, diffused into a fumigation layer and fumigated adults of pink bollworm principle. Since 1971, Nongtong Agricultural Science and Technology Institute of Jiangsu Province has used this method to carry out prevention and control experiments. Over the past few years, the area of prevention and control has been expanding. From 1974 to 1974, it has been demonstrated in over 54,000 mu of cotton fields in 54 communes and suburbs of Nantong City. Four years of practice has proved that the use of dichlorvos toxic fumigation control pink bollworm, has the following advantages: ① effective. According to their experimental demonstration results, the use of this method to control the pink bollworm spray control, boll damage rate decreased 38.1-45.7%, single bollworm Road, 67.7-68.2%, a decrease of 100% berry egg volume, one hundred Seed cotton insect population decreased by 50%. Therefore, lint quality is greatly improved. According to Rudong County Central Plains commune in the second and third generation of red bollworm fumigation