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棉铃虫为世界性的害虫,也是我国当前棉花主要害虫之一。近年来,随着抗药性的产生,一些常用农药对棉铃虫的防治效果逐渐下降,用药次数、浓度和药量都不断增加,造成环境污染和棉田农药成本逐年上升。为了开展棉虫的综合防治,保护和利用棉虫的天敌,几年来,我们对湖北省棉铃虫的天敌进行了田间调查和室内观察试验。现将初步的结果报告于下。
Cotton bollworm is a worldwide pest and is also one of the major cotton pests in our country. In recent years, with the emergence of drug resistance, the control effect of some commonly used pesticides on cotton bollworm gradually decreased, the number of drugs used, the concentration and dosage were continuously increased, causing environmental pollution and pesticide costs in cotton fields increased year by year. In order to carry out comprehensive control of cotton insects and protect and utilize natural enemies of cotton insects, we conducted field surveys and laboratory observations on the natural enemies of cotton bollworms in Hubei Province over the past few years. The preliminary results are reported below.