果农常把1～2年生幼树枝干、枝条埋入土堆中,当第二年春季把幼树放开时发现幼树的枝干表皮被啃食,根被啃食。有的幼树当年死亡或生长势极弱或缓慢死去。 有的初果期树或成年树呈老树状,树势生长弱,枝条不发达,刨开根部土层发现树根被啃食,严重影响果树产量。 Fruit growers often 1-2 year-old young branches, branches buried in the mound, when the sapling the next spring when the young tree branches were found to eat the skin, the roots are eating. Some saplings died or grew very weak or died slowly. Some early fruit trees or adult trees were old trees, tree growth is weak, the branches are underdeveloped, dig the roots of soil found in the roots are gnawing, seriously affecting the yield of fruit trees.