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草蛉是粮棉害虫的主要天敌之一。在我县草蛉经常在小麦、棉花、玉米、谷子、豆类及树木林间活动。但是,过去几年由于单纯使用化学农药,造成草蛉大量死亡,田间存量大大减少。1974年我们在棉田开展综合防治棉虫活动后,注意保护害虫天敌,减少用药面积,促进了草蛉繁殖,田间存量大增。为了进一步摸清草蛉的活动规律,我县黄庄、吴堂、轩庄等十多个大队,自1973年8月至1974年开展了部分室内饲养、田间观察及自然利用工作,现将这些工作小结如下。
Grass 蛉 is one of the main natural enemies of grain and cotton pests. In our county weeds often run on wheat, cotton, corn, millet, beans and trees. However, in the past few years, due to the simple use of chemical pesticides, a large number of kelp deaths were caused and the amount of stock in the field was greatly reduced. In 1974, after we carried out the integrated prevention and control of cotton insects in the cotton fields, we paid attention to protecting the natural enemies of pests, reducing the area for drug use, and promoting the breeding of weeds. The amount of stock in the field soared. In order to further clarify the law of the activities of the lawn, my county Huangzhuang, Wu Tang, Xuanzhuang more than a dozen brigades, from August 1973 to 1974 carried out part of the indoor rearing, field observation and natural use of these now these The work is summarized as follows.