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松干蚧属同翘目、珠蚧科,为刺吸危害松树枝干的害虫.由于此虫在苏州地区发生面积较大,危害严重,已列为地区主要林木害虫之一.1981年在森林病虫普查工作中,着重对此虫的发生面积、分布范围、危害程度等作了比较全面的调查取得了丰富资料,可为今后防治提供参考.现将调查结果,整理如下:一、松干蚧的危害性松干蚧危害赤松、马尾松和黑松.在苏州地区以危害10—20年生的马尾松为主.轻者造成松树枯枝,严重的整株死亡.据观察,松干蚧寄生部位在主干裂缝、枝条向下一面皮层居多,其口器刺入皮层组织,吸取树液,致使枝条向下一面输导
As a result of its large area and serious harm in Suzhou area, it has been listed as one of the main forest pests in the region. In 1981, In the census work, we made a comprehensive survey on the occurrence area, distribution range and degree of harm of this pest and obtained rich information, which can provide reference for future prevention and treatment.Research results are summarized as follows: 1. Pinus massoniana endangered Pinus thunbergii, Pinus massoniana and Pinus thunbergii in the Suzhou area to endanger the 10-20 years of mass-based pine. Light led to dead pine trees, the whole plant died. It was observed that the parasitic sites of pine dry scales in the trunk cracks, branches to Most of the next cortex, its mouth piercing cortical tissue, draw the sap, causing the branches to the next side of the guide