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褐稻虱是水稻穗期的暴发性害虫.近几年来,由于耕作制度的改变和夏凉秋暖气候 的不断出现,太湖流域稻区褐稻虱的暴发频率很高,对单季稻和后季稻的高产稳产威胁甚大.为及早准确预测它的发生,适时进行防治,我站自1973年起,就试用了以卵发育进度为依据的发生期预测和以卵密度为依据的发生量预测,通过近三年来的预测验证及在全省试行,结果均较正确可靠.为了进一步
Brown planthopper is an outbreak of pests in the heading stage of rice.In recent years, due to the change of tillage system and the continual appearance of summer and cool autumnal warm season, the outbreak frequency of brown planthopper in the Taihu Lake Basin is very high, In order to accurately predict its occurrence as soon as possible and prevent and control it timely, we have tried out the occurrence prediction based on the progress of egg development and the prediction of the occurrence based on egg density since 1973. Nearly three Proven in years of verification and pilot in the province, the results are more accurate and reliable. In order to further