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为有效防治日本松干蚧,采用氧化乐果打孔注药,经过效益分析表明,这种防治方法可挽回油松木材损失量。对虫口密度等级为Ⅰ、Ⅱ、Ⅲ级的油松,每公顷每年挽回经济损失分别为154.80元,696.60元和877.20元。
In order to effectively prevent and deal with Japanese pine scale, using omethoate perforated injection, after the benefit analysis shows that this method of prevention and treatment can restore the loss of pine wood. For pests with Ⅰ, Ⅱ and Ⅲ densities of insect population, the economic losses per hectare are 154.80 yuan, 696.60 yuan and 877.20 yuan respectively.