福建省武平县萧氏松茎象的发生与防治

Occurrence and control of Hylobitelus xiaoi in Wuping of Fujian Province

萧氏松茎象Hylobitelus xiaoiZhang在武平县2a发生1代，以幼虫、成虫、蛹越冬，主要危害松属树种，可造成松树枯死。其发生与坡向、坡位、坡度、树种、胸径、林分结构、林龄、郁闭度、林相和海拔有一定相关关系。采用人工挖掘捕杀幼虫、蛹，翌年松林中萧氏松茎象的虫口密度可减少70％～90％。如第2年再次进行人工挖掘捕杀幼虫和蛹，效果会更好，但必须掌握好挖掘的时间，7—8月为最佳。

Hylobitelus ：xiaoi had one generation two years and overwintered as larva, adult and pupa in Wuping. It attacked Pinus spp. and resulted in the death of the pines. The direction, position and gra- dient of slopes, tree species, breast-height diameter, stand composition, age of stand, canpony density, forest aspect and altitude were correlated with the occurrence of Hylobitelus xiaoi. The population den： sity could be reduced by 70 %-90 % after the artificial digging-up of the larva and pupa the year before. The optimum time for the digging was between July and August.