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By: McDonough, FrankType: ArticleIn: Exploring the arboretum : magazine for the members of the Los Angeles County Arboretum and Botanic GardenVolume: 2013:winter/springSeries:Issue:Date: 2013Page Range: 9Publication Info: Arcadia, Los Angeles Arboretum Foundation, [200-?]Subjects: ambrosia beetles Beetles -- California -- Control Polyphagous shot hole borer