榆林沙区沙蒿木蠹蛾防治技术研究

Technologies to Control Holcocerus artemisiae in Yulin Sandy Area

针对沙蒿木蠹蛾危害沙蒿,致使树木枯死,林地退化问题,在榆林市毛乌素沙地进行了物理技术(黑光灯诱杀)、平茬营林技术、化学防治、物理技术+化学防治等四种措施防治沙蒿林地沙蒿木蠹蛾试验。结果表明:沙蒿木蠹蛾在每年的6-8月月初出现3次孵化高峰,成虫具有明显的趋光性,可以利用杀虫灯诱杀;距杀虫灯越近防治效果越好,杀虫灯间距一般不应超过200 m;平茬抚育可有效减少受害株率和虫口密度,平均防治效果88.3%;在沙蒿根际及其周围撒施或注射辛硫鳞、80%敌敌畏、40%氧化乐果+50%杀螟松乳剂溶液,防治沙蒿木蠹蛾效果都较明显,其中根际注射40%氧化乐果+50%杀螟松乳剂800倍液防治效果最好(80.0%);化学药剂结合杀虫灯防治沙蒿木蠹蛾,效果优于单项防治措施。建议生产中采取平茬、冬季根部注射40%氧化乐果+50%杀螟松乳剂800倍液,生长季设立杀虫灯等防治措施。

In Mu Us sandy land of Yulin,four control measures,namely physical technique(black light trapping),silvicultural technique,chemical control and integrated control(physical technique+chemical control),were carried out to control Holcocerus artemisia.The results showed that Holcocerus artemisiae has three periods of incubation during June,July and August and its adults have strong phototaxis,because of which insecticidal lamp can be applied to trap the insects.The effect of control by insecticidal lamp,better to be 200 m apart,is good.Stumping can effectively reduce the density of insects and the number of plants infected,with effect reaching 88.3%.Surrounding Artemisia plants,chemical spray like phoxim,80%panaplate,40%dimethoate oxide,and 50%borer pine emulsion solution all proved effective,with effect reaching 80%.It is concluded that chemical spray plus insecticidal lamp performed best,superior to any individual measure.It was suggested that measures integrating stumping,chemical spray and insecticidal lamp together to control Holcocerus artemisiae.