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.