Report on the occurrence and control of the Asian Gypsy Moth (AGM), Lymantria dispar (Linnaeus) (Lepidoptera: Lymantriidae) in port areas of Japan.

摘要

The occurrence and distribution of the Asian Gypsy Moth (AGM) within the 32 port areas of Japan was investigated from 2004 to 2008 in a trapping survey using a pheromone attractant (disparlure). AGM occurrence shifted later in the year with the increasing latitude of ports, from mid June to late July in southwestern regions, and from early August to mid September in Hokkaido. The trapping periods at each port varied from one locality to another, but the average was approximately 40 days. The relationship between the location of each trapping site and the numbers of AGM trapped indicated that the distribution of AGM within port areas was concentrated in green belts where hosts were abundant. Next, in order to evaluate the effectiveness of control actions, the numbers of AGM trapped at four ports where various control methods were used in 2007 and 2008 were compared with those of previous years or at other ports. The results indicated that control actions were effective to some extent in the cases of four of the ports.