アフリカシロナヨトウ用の合成性フェロモントラップで誘殺される日本産<i>Spodoptera</i>属成虫の識別法の開発

Abstract

The genus Spodoptera Guenée mainly distributed from tropical to subtropical regions throughout the world includes many pests of food crops, vegetables, forage crops and grasses. The African armyworm, Spodoptera exempta (Walker) has been known from Africa, South East Asia, parts of Australia to some Pacific islands as a pest of crops or pasture, however, no damage by this pest had been reported from Japan before 2010. From Japan, only five adult specimens had been collected before 2010. These specimens probably flew from the tropical region of Asia to Japan because S. exempta is a well known migratory pest in Africa. Severe damage of forage crops and grasses by this species was recognized for the first time from Japan at Nansei Islands in 2010. Therefore, survey using a synthetic sex pheromone for S. exempta was conducted by the Okinawa Prefectural Plant Protection Center and the Kagoshima Prefectural Institute for Agricultural Development. As a result, several species of Spodoptera were collected by the pheromone trap for S. exempta including S. exempta. We made a key to distinguish all eight Japanese species of Spodoptera mainly using male genitalia. Furthermore, we were able to distinguish six Japanese Spodoptera pest species using standard DNA barcoding.