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我社棉花80～82三年连续低产,亩产量在百斤以下。有多方面的经验教训,在药剂防治上也值得探讨一番。一九八○年,我社提出:“以大田治蚜少用农药为中心,充分利用天敌为重点,加强后期药剂防治”的策略。这年到6月底大田没用一次农药,虽无棉蚜、叶螨为害,但部分田块绿盲蝽突发,二代棉株破头疯率从上年的1～3％上升到5～11％,个别田块高达17％。加上这年7月、8月雨日特别
Our society cotton 80 ~ 82 three consecutive years of low yield, yield per kilogram below. There are many lessons learned in the prevention and treatment of pharmaceutical is also worth discussing some. In 1980, CCS put forward the strategy of “taking the use of pesticides in the fields as a center and taking full advantage of natural enemies as focal points, and strengthening the prevention and control of pesticides in the later period.” This year to the end of June useless pesticide in the field, although no aphids, spider mite damage, but some fields green bugs burst, the second generation of cotton broken head crazy rate from 1 ~ 3% the previous year rose to 5 ~ 11%, individual fields up to 17%. Plus July this year, August rainy day special