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松干蚧是赤松、油松的毁灭性虫害,树木被害后2-3年就可使枝条弯曲,树干倒伏(15年生以下的幼树),树势衰弱,生长基本停止。在遇到次期害虫如小蠹虫、松黄星象(虫甲)等并发危害的情况下,可在短期内使树木大片枯死,死亡后的树木材质低劣,降低利用价值。在毛主席无产阶级革命路线指引下,我们三结合科学试验小组开展了有关的试验研究工作。为适应生产防治的迫切需要,侧重搞了防治效果调查、以往药剂重复试验及新药剂筛
Songkrania scabi is a devastating insect pest of Pinus taeda and Pinus tabulaeformis. Branches can be bent 2-3 years after being killed and the trunk lodging (young trees below 15 years of age). The tree is weak and its growth basically stops. In the event of secondary pests such as bark beetle, pine yellow star (insect) and other concurrent damage, the trees can be made in a short period of large dead, the trees after the death of poor quality, reduce the value of use. Under the guidance of Chairman Mao’s proletarian revolutionary line, we have carried out relevant experimental studies with the Scientific Experimental Group. In order to meet the urgent need of prevention and control of production, we focused on investigating the effect of prevention and treatment, repeated trials of pharmaceutical agents and screening of new pharmaceutical agents