步曲又名尺蠖,俗名弓腰虫。种类很多,有梨步曲、枣步曲、刺槐步曲、柿星步曲、木橑步曲等。属鳞翅目,尺蠖蛾科,食叶害虫。其中为害苹果、梨、枣树最重的是梨步曲和枣步曲。在七十年代以前,梨步曲主要危害梨树,枣步曲主要危害枣树。从1979年开始,发现有的苹果园被步曲危害,1980 Also known as the foot of the footstep song, common name bow waist worm. Many types, there are pear step, jujube step, Robin Huacai step persimmon star music, Mucha step song. Lepidoptera is a genus, moth family, leafy insect pests. Which harm apple, pear, jujube is the most important pear step and jujube step music. Prior to the seventies, Pear Buqu was the main hazard to pear, jujube step Jujube mainly harm. From 1979, some apple orchards were found to have been harmed by the steps, 1980