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    Author(s): David R. Houston
    Date: 1971
    Source: In: Oak Symposium Proceedings. 1971 August 16-20; U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station: Upper Darby, PA. 118-123.
    Publication Series: Other
    Station: Northern Research Station
    PDF: View PDF  (1.02 MB)

    Description

    Noninfectious diseases arise primarily from the harmful effects of wound agents, chemical, and adverse environmental factors. Wounds directly result in damage to trees, but they are important primarily as infection courts for pathogenic organisms. Adverse environmental factors affect trees both directly and indirectly. Trees weakened by environmental stresses become susceptible to insects and fungi that normally are unable to attack. These "declines" of oak have occurred frequently in the Northeast and Southeast and will probably increase as concern for environmental quality restricts the use of pesticides.

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    Citation

    Houston, David R. 1971. Noninfectious diseases of oaks. In: Oak Symposium Proceedings. 1971 August 16-20; U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station: Upper Darby, PA. 118-123.

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