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  1. Apple blotch and its control /
    By: Roberts, John W.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1917.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Apple blotch  Apples  Diseases and pests  
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  2. Field experiments in spraying apple orchards for the control of apple blotch / by A.J. Gunderson.
    By: Gunderson, A. J.
    Publication info: Urbana, Ill. :University of Illinois Agricultural Experiment Station,1919.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Apple blotch  Apples  Diseases and pests  
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  3. Phyllosticta leaf spot, fruit blotch, and canker of the apple : its etiology and control / by Emil Frederick Guba.
    By: Guba, Emil Frederick,
    Publication info: Urbana, Ill. :University of Illinois Agricultural Experiment Station,1925.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Apple blotch  Apples  Diseases and pests  
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