Browsing Washington State University Extension by Author "Olsen, Kirk"
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Grape Leafhoppers in Washington
Olsen, Kirk; Cone, Wyatt Wayne, 1934- (Pullman, Washington : Washington State University. Extension., 1997-06)These small insects are economic pests in Washington vineyards, where they feed extensively on leaf tissue and fly into the faces of workers. Color photos aid in indentification of two major problem species. The authors ...