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近年来,棉铃虫的发生随着耕作制度的改革,农业生态环境的改变,也相应地发生了变化。同时由于长期使用滴滴涕化学农药防治,不仅带来污染环境的后果,还使虫子抗药性增强,天敌大量被杀死,致使棉铃虫危害日趋严重,防治面积逐年扩大,喷药次数越来越多。为了进一步探索棉铃虫在新的条件下的发生规律,提高防治技术水平,我们在上级党委和省、地、县科委的大力支持下,在省植保土肥研究所驻点同志的具体帮助下,以阶级斗争为
In recent years, the occurrence of cotton bollworm has changed correspondingly with the reform of farming system and the change of agro-ecological environment. At the same time, due to the long-term use of DDT chemical pesticide control, not only bring the consequences of environmental pollution, but also enhance the resistance of insects, natural enemies were killed in large numbers, resulting in the increasingly serious harm bollworm, control area has been expanding year by year, more and more spraying. In order to further explore the occurrence of cotton bollworm under the new conditions and improve the level of prevention and control technology, with the strong support of the party committees at the higher level and provincial, prefectural and county science and technology commissions, with the specific help of the resident comrades of the Provincial Institute of Plant Protection and Protection of Soil and Fertilizer, Take class struggle as