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1968年以来,褐稻虱一直是本省水稻的主要害虫之一.因褐稻虱为害,每年损失稻谷约0.5-1.0亿斤.褐稻虱在本省不能越冬,每年冬后虫源系从南方迁飞而来.迁入本省后,在田间,一年发生4-5代,其中为害最大的是9月中、下旬至10月上中旬发生的第4代.年度间由于种群迁入峰次、时期、数量及影响种群活力的气温等的不同,水稻受害的面积和程度也不同.本文根据我们1973-1980年在萧山县迳游公社下俞大队的田间系统调查,诱虫灯逐日诱杀褐稻虱长翅型成虫记录和有关气象因素的分析,对本省第4代褐稻虱猖獗因素及预测问题作如下探讨.
Brown planthopper has been one of the main pests of rice in our province since 1968. Due to brown planthopper damage, annual loss of about 0.5-10000 million kg of rice. Brown planthopper in the province can not wintering, each year after the winter insect pests from the south Flew in. After moving into the province, in the field, occurs 4-5 generations a year, of which the most damaging is the mid-September to late October to mid-fourth generation occurred in mid-year due to the population moved to the peak, Period and quantity of the population and the temperature which affect the vitality of the population, the area and degree of rice damage are also different.This article according to our 1973-1980 Xiayu County tour team Xia Yu team field investigation, trap light trapping brown rice day by day Lice long-winged adult records and related meteorological factors analysis of the fourth generation of brown planthopper rampant factors and forecast the following issues.