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稻田保蛛治虫,自1976年开始,连续四年,面积日益扩大,均取得较好效果。但病虫一般发生年份有效,病虫大发生年份是否有效?1980年早稻第一代飞虱发生量即较往年大,据病虫预测预报,多种病虫将会大发生,加上天气连续阴雨、偏施氮肥,迎合了飞虱、叶蝉、纵卷叶螟和纹枯病等多种病虫大发生需要,增强了病虫大发生的可能性。由此,我们注意了系统和抽样调查,以便弄清飞虱、叶蝉及其天敌发生的实际状况;对
Paddy spider pest control, since 1976, for four consecutive years, growing area, have achieved good results. However, pests and diseases generally occur year effective, pest occurrence is effective? The first generation of planthopper occurred in early rice in 1980 is larger than in previous years, according to prediction of pests and diseases, a variety of pests and diseases will occur, with the weather continuous Rainy, partial nitrogen fertilizer, to meet the planthopper, leafhopper, leafroller and sheath blight and other pests and diseases occur a large need to increase the possibility of a large occurrence of pests. As a result, we have drawn attention to systems and sample surveys in order to understand the actual status of planthoppers, leafhoppers and their natural enemies;