Abstract: Temik 9ppm can successfully control the reproduction of Bursaphelenchus xylophilus growing on the Botrytis cinerea. If 40 grams of 15% temik granule are injected into each Pinus thunbergii Parl, the contents of temik in the trunks will be 20.013~51.796 ppm in 30 days and 17.575-40.386 ppm in 50 days. Sawdusts mixed with different contents of temik will influences the growth of Bursaphelenchus xylophilus at different extent. During the emergence of Monochamus alternatus Hope, 100 % of the boles of Pinus thunbergii are protected by injecting temik into the trunks only once a year. A new way is provided to control Bursaphelenchus xylophilus.