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本地区位于北纬29°05′—31°05′,东经108°30′—110°30′。自1966年全区推广水稻矮秆品种后,白背飞虱为害逐年加重,现已成为二高山的主要害虫,低山区仅次于褐飞虱的重要害虫。1980年全区120万亩水稻,因褐飞虱和白背飞虱为害减产稻谷达一亿斤左右。1979—1980年我们对白背飞虱的发生规律进行了系统观察研究,结果如下。 一、生物学特性 1.发生世代:白背飞虱在低山中稻区一年发生四代,低山双季稻区一年发生五代,
The area is located at latitude 29 ° 05’-31 ° 05 ’and longitude 108 ° 30’-110 ° 30’. Since 1966, the promotion of rice dwarf varieties in the region, the white-backed planthopper infestation increased year by year, has now become the main pest of the two high mountains, low mountainous area second only to Nilaparvata lugens an important pest. In 1980, 1.2 million mu of rice in the region was hit by 100 million kilograms of rice due to the brown planthopper and the white-backed planthopper. From 1979 to 1980, we systematically observed the occurrence of Sogatella furcifera. The results are as follows. First, the biological characteristics 1. Occurrence of generations: whitebacked planthopper in the low mountain mid-year occurred four generations of rice, low mountain double crop five years a year,