Treehopper insect populations (Hemiptera: Membracidae) were surveyed in 2018 in Benton, Josephine, and Yamhill Counties, Oregon to determine their potential roles in the epidemiology of Grapevine red blotch virus. Stictocephala basalis and Tortistilus albidosparsus were identified through a taxonomic assessment of samples collected by hand near vineyards and in a natural area. Historical presence of Spissistilus festinus in the Willamette Valley is discussed. Voucher specimens were deposited in the Oregon State Arthropod Collection and at the United States National Museum of Natural History.
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Dalton et al. (2020) studied this question.
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