利用引诱剂和肿腿蜂防治松墨天牛的研究*

松墨天牛是松树的主要蛀干害虫,亦是松材线虫病的主要传播媒介。利用引诱剂能够大量诱集松墨天牛,使用浓度以1:3较为经济实用。1号引诱剂诱虫能力最强,1、2号混合液及4号诱虫效果次之。诱虫量一般比对照提高17.8～54.9倍,比伐倒木提高1.2～3.2倍,比病虫枯死木提高5.8～7.2倍。诱集后可降低林木枯死率2％～32％,防治效果达70％～95％。施引诱剂的同时再施1:1的氧化乐果稀释液可毒杀62.4％～100％的天牛幼虫。每公顷释放管氏肿腿蜂28 142头,当代防治效果可达40％～50％,经3～4个月持续防治效果可达69.6％～85.3％。

Study on Control of Monochamus alternatus with Attractant and Scleroderma guani

Japanese pine sawyer (Monochamus alternatus Hope) is an important wood borer of pine tree and the vector of wood nematode. They can be trapped by attractants. The economical and suitable concentration for attraction is 1:3. The best effect is the No.1 attractant; less effects of the attractant are both mixed solvent of No.1 and No.2 and No.4. Insect attracted by attractant tree is over 17.8~54.9, 1.2~3.2, 5.3~5.8 times than those of control tree, fallen tree and withered tree respectively. Tree mortality is reduced by 2%~32% after applying attractants to the pine stand. The actual control effect is about 70%~95%, Applying attractant with oxidize rogor diluted solution (1:1) at the same time, the larvae will be killed about 62.4%~100%. A kind of parasitic wasp (Scleroderma guani Xiao et Wu) is released in pine stand (28 142 head per ha.), the control effect of contemporary generation is about 40%~50%, and will reach up to 69.6%~85.3% after three to four months.