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    Byther, Ralph S. (34)
    Davidson, Roy M., 1939- (12)Antonelli, Arthur L. (8)Gould, Charles J. (7)Crandall, Perry C. (3)Peabody, Dwight V. (3)Scheer, William P. A. (3)Shanks, Carl H. (3)Campbell, R. Lee (Ronald Lee) (2)Retan, Arthur H. (2)... View MoreSubjectIrises (Plants)--Diseases and pests. (1)Narcissus (Plants)--Diseases and pests. (1)Tulips--Diseases and pests. (1)... View MoreDate Issued1979 (10)1978 (10)1977 (5)1976 (9)

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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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    Verticillium wilt of maples 

    Davidson, Roy M., 1939-; Byther, Ralph S. (Pullman, Washington : Washington State University. Extension., 1977-06)
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    Common causes of plant damage and suggestions for plant care 

    Davidson, Roy M., 1939-; Byther, Ralph S. (Pullman, Washington : Washington State University. Extension., 1978-01)
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    Disease control recommendations for Tulips 

    Gould, Charles J.; Byther, Ralph S. (Pullman, Washington : Washington State University. Extension., 1978-01)
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