Preliminary Experiment with'Hulinshen' Powder to Control Tomicus piniperda

Hulinlshen' powder was applied to 2 hm² stand of Pinus yunnanensis heavily infected by Tomicus piniperda twice during the period of shoot transferring of Tomicus piniperda pests, but prior to their invasion into target trees to control the bugs in Lufeng County, Yunnan.A piece of adjacent Pinus yunnanensis stand with the same area of 2 hm² was set as control.The results showed that the damage index of the experimental area was 1.4 and the damage rate was 3.8%, while the damage index and the damage rate in the control area were 16.2 and 28.5% respectively.The control effect reached 91.4% in this trial.