黄芪为重要的药用植物，２００１年北京种植面积１２００ｈｍ２主要分布在通州、顺义、大兴、房山等区县，并以每年２０％的幅度递增。２０００年黄芪收获期调查，根部受害率平均７０％，受害严重的达９０％以上，２００１年，全市普查，黄芪苗期平均死苗率１３％，发病田率１ Astragalus is an important medicinal plant. In 2001, the planting area of ​​1200hm2 in Beijing was mainly distributed in Tongzhou, Shunyi, Daxing, Fangshan and other counties, with an annual increase rate of 20%. Harvest of Astragalus in 2000 survey, the root damage rate of 70% on average, seriously affected more than 90% in 2001, the city’s census, the average seedling rate of Astragalus 13%, the incidence rate of 1