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当前,防治蛀干害虫幼虫主要采用药泥、药棉塞孔,药水注射等方法,由于虫道较深且弯曲,虫粪堵塞等原因,药剂难及虫体,因而杀虫效果不够理想。山西农大林学系王志勇等同志研制出了一种成本低、杀虫率高、使用方便而且安全的熏蒸毒签,1981～1983年对杨大透翅蛾、光肩星天牛等四种蛀干害虫幼虫进行了近百亩的防治试验,杀虫率达95%以上,取得了较好的防治效果。毒签熏蒸是根据 Zn_3P_2+3H_2C_2O_4·2H_2O=3ZnC_2O_4+2PH_3↑+6H_2O 的原理设计的。按一定的方法,把磷化锌与草酸胶结在细竹签(或木签)的一端,将药段插进虫道内,当树液和虫粪中的水分接触到药段时,发生化学反应,产生剧毒气体磷化氢,熏杀虫道
At present, the main methods for preventing and controlling boreworm larvae are insecticide, insect tampon and syringal injection. Insecticidal effects are not ideal due to the deep and curved larvae, the clogging of insects and insects, and the insecticides. Wang Zhiyong and other comrades from Shanxi Agricultural University developed a low-cost, high insecticidal rate, easy to use and safe fumigation of poisoning, from 1981 to 1983 on the Yang great-finned moth, Anoplophora gossypii and other four kinds of bore pest larvae were Nearly a hundred acres of prevention and control tests, insecticidal rate of 95% or more, and achieved good control effect. The poisoning sign fumigation is designed according to the principle of Zn_3P_2 + 3H_2C_2O_4 · 2H_2O = 3ZnC_2O_4 + 2PH_3 ↑ + 6H_2O. According to a certain method, the zinc phosphide and oxalic acid cement in thin bamboo stick (or wooden sign) at one end, the drug inserted into the worm lane, when the sap liquid and insect manure in contact with the drug, the chemical reaction , Produce toxic gas phosphine, smoked insects Road