通过2003～2005年对北京地区西花蓟马发生为害情况进行的系统调查监测,发现发生地由2003年的2个点扩大为2005年的6个区,呈蔓延扩散趋势;为害的植物也从最初的辣椒到2005年的28科65种,以葫芦科的荷兰黄瓜、甜瓜及十字花科的白萝卜叶片受害最为严重。另外,就不同寄主上西花蓟马的发生为害动态进行了系统调查,初步分析了其在自然条件下的种群消长规律。 Through systematic investigation and monitoring of the occurrence of western flower thrips in Beijing from 2003 to 2005, it was found that the occurrence of the disease increased from 2 spots in 2003 to 6 districts in 2005, spreading and spreading; The first pepper to 28 families in 2005 65 species, the cucurbitaceae of the Netherlands cucumber, melon and cruciferous white radish leaves suffer the most serious. In addition, we systematically investigated the dynamics of the occurrence of F. occidentalis on different host plants, and initially analyzed the population decline and growth pattern under natural conditions.