豚草(Ambrosia artemisiifolia L.)(照片1)和三裂叶豚草(Ambrosia trifida L.)(照片2)属于菊科豚草属植物,原产北美洲,本世纪30年代传入我国。在国外,它们是农田主要杂草之一,更为严重的是,它们的花粉能引起人体过敏。加拿大每年有80万人,美国每年有1400多万人患豚草花粉症(Ragweed pollinsis)。在国内,解放军某部医院在沈阳已发现128例病人,江苏省人民医院对608例哮喘病人同时用13种常见过敏原做致喘活性试 Ambrosia artemisiifolia L. (Photo 1) and Ambrosia trifida L. (Photo 2) belong to the genus Rachycenidae, native to North America and introduced to China in the 1930s. Abroad, they are one of the main weeds in the farmland. More seriously, their pollen can cause allergies to the human body. There are 800,000 people in Canada each year and more than 14 million people in the United States each year suffer from Ragweed pollinsis. In China, a PLA hospital in Shenyang has found 128 patients, Jiangsu Provincial People’s Hospital of 608 cases of asthma patients with 13 common allergens do asthma activity test