前言日本松干蚧原产日本,在亚洲和北美发生在7种松树上(表1),都是松属、Sylvestres Loud亚组成员。该亚组的19个种多数分布在欧亚大陆,只有美加红松分布在美国。已知松属其它亚组8个种不是日本松干蚧的适合寄主(表1),这些种可能由于植物化学方面的属性,而对松干蚧产生抗性。在日本的原产地,松干蚧为害两种当地松一赤松(P.densiflora Sieb.& Zucc)和黑松(P.thnubergiana France),其分布范围从本州(北纬41°31’)的北边向南 Foreword Songjak japonica is native to Japan and occurs in seven species of pine trees in Asia and North America (Table 1), all members of the Pinus, Sylvestres Loud subgroup. Most of the 19 species in this subgroup are distributed in Eurasia, with the United States and Canada only distributed in the United States. It is known that eight of the other subgroups of Pinus are not suitable hosts for M. japonicum (Table 1), and these species may be susceptible to M. przewalskii due to phytochemical properties. In the native area of ​​Japan, Pinctada melitensis infects two native P.densiflora Sieb. & Zucc and P. thnubergiana France, which range from north to south of this state (41 ° 31’N)