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Sagebrush defoliator outbreak in Northern CaliforniaAuthor(s): Ralph C. Hall
Source: Res. Note PSW-RN-075. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 12 p
Publication Series: Research Note (RN)
Station: Pacific Southwest Research Station
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DescriptionThe sagebrush defoliator was responsible for varying degrees of sagebrush defoliation and mortality over a widespread area in southeastern Oregon, northeastern California, and northwestern Nevada in 1963 and 1964. Severe defoliation sometimes killed sagebrush in a single season. Indications are that the outbreak will continue at least another season. A. websteri has a single annual generation. It is attacked by several species of parasites and predators; the most important of these in California was a Copidosoma.
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CitationHall, Ralph C. 1965. Sagebrush defoliator outbreak in Northern California. Res. Note PSW-RN-075. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 12 p
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