A New Species of Oobius Trjapitzin (Hymenoptera: Encyrtidae) From the Russian Far East That Parasitizes Eggs of Emerald Ash Borer (Coleoptera: Buprestidae)

作者：Yao, Yan-Xia; Duan, Jian J.^*; Hopper, Keith P.; Mottern, Jason L.; Gates, Michael W.

来源：Annals of the Entomological Society of America, 2016, 109(4): 629-638.

DOI：10.1093/aesa/saw022

• new species
• egg parasitoid
• identification
• invasive wood borer
• biological control

We describe a new species of egg parasitoid, Oobius primorskyensis Yao & Duan n. sp., collected from the emerald ash borer Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) near Vladivostok, Russia. Morphological and molecular analyses indicate that this taxon is sufficiently distinct from Oobius agrili Zhang & Huang 2005 to merit species status. Furthermore, DNA sequence divergence between O. primorskyensis and specimens in culture of Chinese origin suggest that O. primorskyensis is molecularly distinct from Oobius previously imported into the United Stated and released as biological control agents of emerald ash borer. Laboratory observations showed that O. primorskyensis also differs from O. agrili in diapause pattern. When reared with A. planipennis eggs at 25 +/- 1.5 degrees C, 65 +/- 10% relative humidity, and a photoperiod of 16:8 (L:D) h, nearly 100% of O. primorskyensis diapaused at the second and third generations after their parents had diapaused, whereas a majority (60-96%) of O. agrili did not diapauses for 11 sequential generations. Diagnosis of the species with respect to O. agrili is provided. The new species is a natural enemy of A. planipennis in its native range and may be considered for introduction against A. planipennis in North America.

• 出版日期2016-7
• 单位中国林业科学研究院森林生态环境与保护研究所