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    Author(s): John Hunt; T.W. Childs
    Date: 1957
    Source: PNW Old Series Research Notes No. 147, p. 1-9
    Publication Series: Forest Research Note
    Station: Pacific Northwest Research Station
    PDF: View PDF  (440 KB)


    A survey of ponderosa pine needle blight during 1955 and 1956, principally in eastern Oregon (where the disease is much more abundant than in Washington), provided information on extent of damage and on association of infection with certain environmental factors. Observations were largely confined to localities where the disease was known to be more than ordinarily common, and further bias was caused by restriction of the survey to the immediate vicinity of roads. Results, however, were in fairly close agreement with estimates by local foresters and with information from other sources, and are considered indicative of the blight situation in localities where the disease is severe enough to be causing appreciable damage.

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    Hunt, John; Childs, T.W. 1957. Ponderosa pine needle blight in eastern Oregon during 1955 and 1956. PNW Old Series Research Notes No. 147, p. 1-9

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