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松突圆蚧是80年代初在广东省毗邻香港、澳门沿海一带发现的一种新的松树害虫。此虫传播蔓延迅速,为害严重,到1991年底已遍及29个市县,约71.8万公顷,枯死松林13.3万多公顷,损失木材3 000万立方米。松突圆蚧一经发现,就立即引起了广东省和林业部门各级领导以及专家们的关注。林业部将“松突圆蚧的综合防治技术研究”列入“七五”、“八五”国家科技攻关计划。根据省政府提出“根治松突圆蚧”的方针,广东省的林业科技人员在摸清该虫生物学特性和发生规律的基础上,采取封锁疫区,杜绝人为传播;疫区边缘营造阔叶林带;修枝间伐松林;喷洒松脂柴油乳剂和枝孢霉菌剂等多种防治措施,耗资近5 000万元。这些措施对松突圆蚧扩散蔓延虽然起到了一定的控制作用,但未能达到彻底控制的目的。
Bursaphelenchus xylophilus is a new pine pest found in the early 1980s in the coastal areas of Guangdong Province adjacent to Hong Kong and Macao. The worm spread rapidly and devastated. By the end of 1991, it had spread to 29 cities and counties with a total of about 718,000 hectares, over 133,000 hectares of withered pine forests and 30 million cubic meters of timber lost. Once found, the pine calabasa immediately aroused the attention of leaders and experts at all levels in Guangdong Province and forestry departments. The Ministry of Forestry will “study on the comprehensive prevention and control technology of Crassostrea burgdorferi” included in the national “five-year plan” and “national science and technology plan” during the “Eighth Five-Year Plan”. According to the provincial government’s policy of “rooting the pine scale”, the forestry scientific and technological personnel in Guangdong Province, on the basis of finding out the biological characteristics and occurrence rules of the pest, took the blockade of the epidemic area and put an end to man-made spread; and the broad-leaved Forest belt, pruning and thinning pine forest, sprayed with turpentine diesel emulsion and Cladosporium and other control measures, costing nearly 50 million yuan. Although these measures played a certain controlling role on the spreading and spreading of Sympelax japonicus, it failed to achieve the goal of complete control.