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豆秆黑潜蝇Melanagromyza sojae(Zehnt.)已成为大豆毁灭性的害虫。据1981—1984年的调查研究,淮北地区夏大豆受害面积逐年扩大与加重,一般田块减产30％左右,较重的可达90％以上。现将近几年研究情况初报于下。 一、发生规律 豆秆黑潜蝇在淮北地区一年发生4代。第一代成虫于5月下旬出现,卵产在小面积的春大豆和早播的夏大豆植株上,被害株率0.5—1％。第二代成虫于6月下旬出现,卵产在夏大豆植株上。幼虫为害盛期是7月上、中旬,大豆
Soybean Melanagromyza sojae (Zehnt.) Has become a devastating pest of soybean. According to the 1981-1984 survey, the area affected by summer soybean in Huaibei region has been expanding and aggravating year by year. Generally, the production of paddy field is reduced by about 30% and the heaviest is more than 90%. In recent years, the first case of the study reported below. First, the law Occurrence of soybean stalk Siphon occurred in Huaibei area 4 generations a year. The first generation of adult worms appeared in late May, egg production in a small area of spring soybeans and early sowing of summer soybean plants, the victim strain rate of 0.5-1%. The second generation of adult worms appeared in late June, egg production in summer soybean plants. The larvae damage peak is in July, mid, soybean