棉苗蚜是棉区重要害虫之一。为了控制其发生为害,人们往往投入大量的农药进行防治。由于过去对棉蚜提出的化防指标,不是要求把棉蚜为害程度控制在经济允许水平以下为目标,而是企图消灭害虫为目标,结果导致单纯滥用农药,忽视利用天敌,这与当前开展综合防治,要求经济有效地防治病虫害是不相适应的。为此我们进行了本课题的试验观察。 Cotton seedling aphid is one of the important pests in cotton area. In order to control the occurrence of harm, people often put a lot of pesticides for prevention and treatment. In the past, the target of chemical defense against cotton aphid was not the target of controlling the degree of harm of cotton aphid below the allowable level of economy, but the attempt to eliminate the pest. As a result, the pesticide was simply abused and the use of natural enemies was neglected. Prevention and control, requiring economic and effective prevention and control of pests and diseases is not compatible. To this end, we conducted the experimental observation of this topic.