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Tetrastichus planipennisi
''Tetrastichus planipennisi'' is a parasitic non stinging wasp of family Eulophidae which is native to North Asia. It is a parasitoid of the emerald ash borer (''Agrilus planipennis'' Fairmaire, family Buprestidae), an invasive species which has destroyed tens of millions of ash trees in its introduced range in North America. As part of the campaign against the emerald ash borer (EAB), American scientists in conjunction with the Chinese Academy of Forestry searched since 2003 for its natural enemies in the wild leading to the discovery of several parasitoid wasps, including ''Tetrastichus planipennisi'' which is a gregarious endoparasitoid of EAB larvae on Manchurian Ash (''Fraxinus mandschurica'') and has been recorded to attack and kill up to 50 percent of EAB larvae.
==Life cycle==
''Tetrastichus planipennisi'' parasitize EAB larvae by drilling through the bark and laying eggs on its host. The hatching parasitoid larvae feed and develop on the EAB larva, resulting in its death. Tetrastichus completes at least four generations each year and one EAB larva can produce up to 127 ''Tetrastichus'' adults. ''Tetrastichus planipennisi'' survive the winter as larvae inside their host or host gallery under the bark of ash trees.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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