榆叶蜂(Arge captiva smith)属膜翅目(Hymenoptera),叶蜂科(Tenthredinoidae)。山东、河南、河北等地均有分布。幼虫为害榆树的叶片,严重时能将叶片吃光。近几年来,绍兴、丽水等地,榆树遭受榆叶蜂为害相当严重。为了探讨白僵菌对榆叶蜂的防治效果,笔者做了一次白僵菌的生物测定及应用白僵菌防治榆叶蜂试验。现将结果报导如 Arge captiva smith is Hymenoptera, Tenthredinoidae. Shandong, Henan, Hebei and other places are distributed. The larvae damage elm leaves, severe leaves can be eaten. In recent years, Shaoxing, Lishui and other places, elm trees are severely affected by prunus cerasifera. In order to explore Beauveria bassiana on Ulmus control effect, the author made a Beauveria bassiana bioassay and application of Beauveria bassiana control Ulmus test. Now report the results