落叶松花蝇是落叶松种实的主要害虫,随种了丰产而大量发生,球果被害率高达90％。球果常因冻害,颗粒无收,但是,花蝇仍能以滞育性隔年为害,可吃掉56％的球果。可见,落叶松花蝇是建立落叶松种子基地和实现良种化的一大障碍,因此,必须及早地掌握其发生规律和防治方法。这对提高种子产量及质量,解决种源不足,保证造林事业的高速度发展具有重要意义。 Larch flower flies are the main pests of larch species, with a large number of high yield occurred, condemnation rate as high as 90%. Cones often freeze damage, crop failure, but the flies can still diapause next year, can eat 56% of the cones. Visible, larch flower flies is the establishment of larch seed base and achieve a major obstacle to the seed, therefore, we must grasp its rules of occurrence and prevention methods. This is of great significance to improving the yield and quality of seeds, addressing the shortages of provenances and ensuring the high-speed development of afforestation.