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Basal Canker of White Pine

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Studies were performed to determine the etiology of a basal canker disease of eastern white pine causing serious losses in young plantations on the Tug Hill Plateau of north-central New York. Inoculations of healthy seedlings with several fungi isolated from natural cankers, including a Fusarium sp., Verticicladiella procera, and Pragmopara pithya, resulted in cankers. The first two fungi, isolated rarely, incited annual cankers; the third fungus, isolated from nearly half the cankers, incited perennial cankers and girdled and killed 8- to 10-year-old seedlings in less than 1 year. Cankered trees in young plantations were associated with ant mounds. Injuries near the ground line created by ants, primarily Formica fusca, and by snow and ice, served as infection courts for the fungi. Damage by snow and ice was related to stand topography. Localized concentrations of damaged and cankered trees occurred along the lee sides of north-south hedgerows and stone piles, and in depressions.

Keywords: Formica fusca; Fusarium sp; Pinus strobus; Pragmopara pithya; Verticicladiella procera; ant injury; snow damage

Document Type: Journal Article

Affiliations: Principal Plant Pathologist, Forest Insect and Disease Laboratory, Northeastern Forest Expt. Sta., Forest Service, U.S. Dept. of Agric., Hamden, Conn.

Publication date: 1969-03-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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