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棉虫种类繁多,而常年对棉花威胁最大的则主要是两红(红蜘蛛、红铃虫)、两棉(棉蚜、棉铃虫)。由于长期袭用陈法陈药,害虫对药剂的抗性日趋加重,防治效果逐渐降低,略有疏忽便暴发成灾。为了控制其危害,不少单位盲目增加喷药次数,提高药液浓度,造成防治成本逐年提高,环境污染加重。群众说:“打不完的药,治不完的虫,治虫难办,棉花难种”。因此,正确掌握主要害虫发生的规律,深刻认识常规防治法的问题所在,认真总结历史的经验教训,改变防治策略、改进防治技术,对开展科学治虫,保障棉花丰产丰收,有着十分重要的现实意义。为此,根据调查研究结果,围绕“掌握棉虫规律,改变防治方法,打破害虫抗性,减少防治次数,降低防治成本,提高防治效果”等方面的问题,谈谈我的看法和建议。
A wide range of cotton insects, and perennial greatest threat to cotton are mainly two red (spider mite, pink bollworm), two cotton (cotton aphid, cotton bollworm). Due to the long-term use of Chen law Chen drugs, pests on the drug resistance increased, the control effect gradually reduced, a slight negligence will be outbreaks. In order to control its harm, many units blindly increase the number of spraying, improve liquid concentration, resulting in prevention and treatment costs increased year by year, aggravating environmental pollution. The masses said: “Endless medicine can not be eradicated, worms are hard to deal with, and cotton is hard to breed.” Therefore, it is of great practical significance to correctly grasp the law of the occurrence of major pests, to deeply understand the problems of conventional prevention and treatment laws, to conscientiously sum up experiences and lessons from history, to change prevention and control strategies, to improve prevention and control technologies, and to carry out scientific pest control and guarantee the bumper harvest of cotton . To this end, according to the findings of the survey, talked about my views and suggestions on the issues of “grasping the law of cotton insects, changing the methods of prevention and treatment, breaking the resistance of pests, reducing the frequency of prevention and treatment, reducing the prevention and treatment costs, and improving the prevention and treatment effects”.