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根据今年调查,棉铃虫越冬蛹的基数较大,去冬今春温度又较高,参考1960年气象展望,棉田小气候对棉铃虫发生较为有利的分析,估计1960年棉铃虫还会在—些地区严重发生。为此,必须引起重视,及早防御。在总结和提高已有的大面积综合防治经验的基础上,继续充分发动群众,继续贯彻洋土并举,采取棉田内外防治相结合,防治蛹、成虫、卵和防治幼虫相结合,农业防治和药剂防治相结合的综合防治措施,贯彻全年,争取主动,把棉铃虫消灭在棉田以外和为害之前。一、消灭越冬蛹消灭越冬蛹是将棉铃虫消灭在棉田以外的第一步重要措施。棉铃虫越冬蛹在土中约潜伏7个月之久,若能抓住这一环节进行歼灭,可大大减少虫源。根据棉铃虫越冬蛹的基数大,春季成活率高,早春第一代发生数量就多的发生规律,第二代在温湿度
According to this year’s survey, the number of overwintering pupae of cotton bollworm is large and the temperature is relatively high during the winter and spring. According to the 1960 Meteorological Outlook, the microclimate in cotton field is more favorable to the development of cotton bollworm. It is estimated that the bollworm in 1960 will be severe in some areas occur. To this end, we must pay attention to early defense. On the basis of summing up and enhancing the existing large-scale comprehensive prevention and control experience, we will continue to mobilize the masses and continue to carry out the strategy of combining both foreign and domestic soil. We should combine the prevention and treatment of pupae, adults and eggs with the prevention and control of larvae, and combine agricultural prevention and treatment with pesticides Prevention and control of a combination of integrated control measures, implement the whole year, for the initiative, the cotton bollworm exterminate outside and before the damage. First, the elimination of overwintering pupae Overwintering pupae is the first step to eliminate the cotton bollworm outside the important measures. Overwintering cotton bollworm pupa in the soil about lurking for 7 months, if you can seize this part of the annihilation, can greatly reduce the source of insects. According to the large number of wintering pupae, the survival rate in spring is high, the number of occurrence of the first generation in early spring is much larger,