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棉红铃虫是我国长江流域棉区的头号害虫。据我站统计,常年百株累计卵量达到3000粒左右;青铃被害率约达60%,僵瓣率约达14%;产量损失率一般达10~20%,严重的超过30%以上;每年防治该虫的投资费用约占棉花病虫总体防治费用的50%以上。严重地影响棉花的稳产、高产和优质。因此,必须认真防治。
Cotton bollworm is the number one pest in the cotton area of the Yangtze River valley in China. According to the statistics of our station, the annual accumulated egg amount of a hundred plants reaches about 3000; the killing rate of green bell is about 60% and the dead valve rate is about 14%; the yield loss rate is generally 10% to 20% and seriously over 30% The annual investment in prevention and control of the pest costs account for over 50% of the overall cost of cotton pest control. Seriously affect the stability of cotton, high yield and quality. Therefore, we must take precautions.