小菜蛾属鳞翅目，菜蛾科，成虫又名方块虫，幼虫俗称“吊丝鬼”，主要危害十字花科作物，喜食甘蓝、菜花，其次是白菜、萝卜、油菜。 根据小菜蛾的生活史、生活习性及发生危害条件和规律，对该虫防治应以农业防治为主，关键时期采用药剂防治并配合其它防治方法。 一、农业防治 Plutella, Lepidoptera, Plutella, adults also known as square worms, larvae commonly known as “hanging ghost”, the main endanger cruciferous crops, like to eat cabbage, cauliflower, followed by cabbage, radish, rape. According to the life history, living habits and the conditions and rules of the occurrence and damage of the diamondback moth, the prevention and control of the pest should be based on the prevention and control of agriculture. In the key period, the pesticides should be used to control and cooperate with other prevention and treatment methods. First, agricultural control