杉梢小卷叶蛾(Polychrosis cuningh Amiacola)是低山丘陵地区杉木幼林的主要害虫,一年发生3～5代,以幼虫蛀入杉木嫩梢顶部或顶芽危害,造成枯梢或多头,严重地影响到林木生长和木材品质。据调查3～5年生杉木主梢受害后,一般萌生出1～6个主梢,其中形成2～3个主梢的占60～80％,生长畸形,难以成材,年高生长减少21.3～23.3％,材积生长量损失22％。在 Polychrosis cuningh Amiacola is a major pest of the young Chinese fir plantation in the hilly area. It takes 3 to 5 generations a year to cause larvae to mound into the top or shoots of shoots, To forest growth and wood quality. According to the survey, 3 to 5 years old Chinese fir main shoot victims, usually sprouting 1 to 6 main shoots, of which 2 to 3 main shoots forming 60 to 80%, deformity, difficult to grow, annual height growth decreased by 21.3 to 23.3 %, Volume growth loss of 22%. in