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近年来,由于棉铃虫危害的加剧,生产投资增加,农民恨虫超量用药,人畜中毒事件屡有发生,棉铃虫的抗药性逐渐增强,生态环境恶化,植棉效益降低,种植面积不断下降。因此抗性棉铃虫已成为我国北方棉区影响棉花生产的主要限制因素之一,山东省受害尤重。据专家预测,近期内我国北方棉铃虫危害不会减弱,而且有向长江流域棉区扩大蔓延的趋势。对此
In recent years, due to the increased harm of cotton bollworm, the investment in production increased, peasants hated worms overdose, human and animal poisoning occurred frequently, the resistance of cotton bollworm gradually increased, the ecological environment deteriorated, the benefit of cotton plantation continued to decline. Therefore, the resistant cotton bollworm has become one of the main limiting factors affecting the cotton production in the northern cotton area in our country. According to experts’ prediction, the harm of cotton bollworm in northern China will not be weakened in the near future, and there is a tendency to expand and spread to the cotton area in the Yangtze River. This