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United States Department of Agriculture


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https://www.fs.usda.gov/treesearch/content/pdf?name=An%20improved%20method%20for%20monitoring%20parasitism%20and%20establishment%20of%20Oobius%20agrili%20(Hymenoptera:%20Encyrtidae),%20an%20egg%20parasitoid%20introduced%20for%20biological%20control%20of%20the%20emerald%20ash%20borer%20(Coleoptera:%20Buprestidae)%20in%20North%20America