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一、发生为害概况马铃薯瓢虫[Henosepilachna vigintioctomacula(Motschulsky)]是甘肃省马铃薯重要害虫之一。早于1958年已有报导,1964年以后在陇南的武都、康县、成县、徽县、西和、礼县、天水等地连年发生为害。近几年以来随着马铃薯良种基地的建立,大面积集中栽培、该虫扩大蔓延日趋严重,尤以西和县为害最重。西和县1982—1984年调查统计,发生面积已占马铃薯栽培面积的40%,四年累计发生面积16.69万亩,减产12%,损失马铃薯1073.5万公斤。
First, the occurrence of harm Overview Potato ladybug [Henosepilachna vigintioctomacula (Motschulsky)] is one of the important potato pests in Gansu Province. As early as 1958, it was reported that after 1964, wudu, Kangxian, Chengxian, Huixian, Xihe, Lixian, and Tianshui in Longnan suffered successive years. In recent years, with the establishment of potato seed base, large-scale intensive cultivation, the spread of the worm has become increasingly serious, especially in Hexi County, the worst damage. In Xihe County from 1982 to 1984, the area surveyed accounted for 40% of the area planted with potatoes. The accumulated area in the four years was 166,900 mu, a decrease of 12% and a loss of 10,735,000 kilograms of potatoes.