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    Author
    Byther, Ralph S. (12)
    Davidson, Roy M., 1939- (12)
    Date Issued1979 (4)1978 (2)1977 (1)1976 (5)

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    Potato scab 

    Davidson, Roy M., 1939-; Byther, Ralph S. (Pullman, Washington : Washington State University. Extension., 1976-06)
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    Tubercularia (nectria) dieback of broadleaf trees 

    Davidson, Roy M., 1939-; Byther, Ralph S. (Pullman, Washington : Washington State University. Extension., 1976-06)
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    Poplar yellow leaf blister 

    Davidson, Roy M., 1939-; Byther, Ralph S. (Pullman, Washington : Washington State University. Extension., 1976-06)
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    Slime molds on lawns and other areas 

    Davidson, Roy M., 1939-; Byther, Ralph S. (Pullman, Washington : Washington State University. Extension., 1976-06)
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    Marssonina leaf and twig spot on willow 

    Davidson, Roy M., 1939-; Byther, Ralph S. (Pullman, Washington : Washington State University. Extension., 1976-05)
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    Sclerotinia disease (white mold) of bean 

    Davidson, Roy M., 1939-; Byther, Ralph S. (Pullman, Washington : Washington State University. Extension., 1978-05)
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    Dogwood anthracnose 

    Davidson, Roy M., 1939-; Byther, Ralph S. (1979-07)
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    Armillaria (shoestring) root rot 

    Davidson, Roy M., 1939-; Byther, Ralph S. (1979-06)
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    Lophodermium needle cast of pine 

    Byther, Ralph S.; Davidson, Roy M., 1939- (Pullman, Washington : Washington State University. Extension., 1979-07)
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    Rhabdocline needle cast of Douglas-fir 

    Davidson, Roy M., 1939-; Byther, Ralph S. (Pullman, Washington : Washington State University. Extension., 1979-06)
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