Adult Emergence Prevalence of Torymus beneficus (Yasumatsu et Kamijo), an Indigenous Parasitoid of Doryocosmus kuriphilus (Yasumatsu), at Two Sites in Nagano Prefecture

• Published in: Annual Report of the Kanto-Tosan Plant Protection Society Vol. 2008; no. 55; pp. 137 - 139
• Main Authors: YARA, Kaori, SASAWAKI, Terunori
• Format: Journal Article
• Language: English; Japanese
• Published: The Kanto-Tosan Plant Protection Society 2008; 関東東山病害虫研究会
• ISSN: 1347-1899; 1884-2879
• DOI: 10.11337/ktpps1999.2008.137

Specimens of Torymus beneficus (Yasumatsu et Kamijo), the indigenous and principal parasitoid of the chestnut gall wasp Doryocosmus kuriphilus (Yasumatsu), were collected from two sites in Nagano Prefecture, and were identified as to emergence strain (early- or late-season strain) using molecular markers: malic enzyme (ME), internal transcribed spacer 2 of nuclear ribosomal RNA gene (ITS2), and/or mitochondrial cytochrome oxidase subunit I (COI). The results indicated that the emergence periods of the two emergence strains of T. beneficus, early- and late-season strain, which were identified by genetic indices, can overlap, although the two strains were so far considered to have significantly different emergence periods.