沙棘木蠹蛾防治技术

吴起县的沙棘面积达到12.53万hm2,全县受沙棘木蠹蛾危害的面积4647.22hm2,分布于9个乡镇,以周湾、长城两乡镇最为严重,虫口密度平均单株达15头以上,危害最重的单株虫口近70多头,幼虫啃食根干,导致根干部腐烂直至死亡。沙棘木蠹蛾的防治技术主要包括平茬更新复壮、化学防治、林分结构调整、采用灯光诱杀和性引诱剂诱杀等方法。

Protection Technology of Holocerus Hippophaecolus (Lepidoptera: Cossidate) in Hippophae rhamnoides L. Stands

The planting area of Hippophae rhamnoides L.has reached 180 million mu in Wuqi County,whereas the area affected by Holocerus Hippophaecolus(Lepidoptera:Cossidate),which is distributed in nine townships,is about 69708.3 mu.In Zhouwan and Changcheng,the two most serious township,the average insect density is more than 15 per single trees,and in the highst is nearly 70.The grubs chew roots,which leaded to the roots decay and the tree death.The main control measures include rejuvenation by cutting,chemical control,structure modulating,the trap and kill by lighting,and sexual inducement agents,etc.