第二次世界大战后,日本于1951年开始从国外大量进口木材。最初每年进口量不超过50万立方米,其中90%来自南洋各国。以后每年持续增长20—30%,到1964年已增长到年进口木材1300万立方米,约从五十多个国家和地区进口。无疑,随着大批量进口的木材,必然带来很多国外害虫。曾工作于日本大阪 After World War II, Japan began to import large quantities of timber from abroad in 1951. The initial annual import volume of not more than 500,000 cubic meters, of which 90% from the Southeast Asian countries. After a sustained annual increase of 20-30%, to 1964 has grown to import 13 million cubic meters of wood, about more than 50 countries and regions. Undoubtedly, with the large quantities of imported timber, it is bound to bring a lot of foreign pests. Once worked in Osaka, Japan