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1987年我国南方稻区稻飞虱发生量大、迁入早、峰次多、范围广、增殖系数高、暴发危害期长,这些均属历史上罕见。本文从气象因素分析导致如此大发生的原因是:1.暖冬少雨,有利于飞虱越冬;2.副热带高压强度偏强,位置春季偏北夏季偏南、持续西伸,有利于稻飞虱迁入;3.凉夏暖秋、夏秋多雨,有利于一季稻飞虱增殖;4.5月份温暖多雨,有利于早稻飞虱数量激增。
In 1987, the rice planthoppers occurred in the southern rice growing area of our country were large, migrated into early, the peak times were more, the range was wide, the multiplication coefficient was high and the outbreak was long-lasting, all of which were rare in history. This article from the analysis of meteorological factors led to such a large occurrence are as follows: 1. Warm winter less rain, is conducive to planthoppers wintering; 2. The subtropical high intensity is stronger, the location of spring northward in summer, southward, extending west, is conducive to planthoppers Into; 3. Cool summer warm autumn, rainy summer and autumn, is conducive to a season of planthopper proliferation; 4. May warm and rainy, is conducive to the rapid increase in the number of planthopper.