The black cutworm [Agrotis ypsilon (Rottemberg)] is a cosmopolitan important underground pest with a wide distribution in China, which can attack many kinds of seedlings of crops and trees.

• 摘要小地老虎是世界性的重要地下害虫，在我国分布广，食性杂，可危害多种农作物幼苗和苗木。