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Role of Dasyscypha willkommii and Related Fungi in the Production of Canker and Die-back of Larches

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The European latch-canker parasite and fungi closely related to and associated with it have been investigated in Europe for more than half a century. Nevertheless, at the time of its discovery in Massachusetts in 1927, the identity of the pathogen was understood imperfectly, and because of this its morphology as well as pathology needed further study. For purposes of control, it became necessary to distinguish the introduced parasite from related fungi including native species. Moreover the determination of its true host range, which up to this time had been greatly confused, became extremely important. Investigations by the writers not only settled the question of identity, but also demonstrated that the parasite attacks only species of larch and not the economically important Douglas fir and ponderosa pine. This paper presents experimental data which demonstrate that the larch-canker organism, and not related fungi, is capable of infecting both native and introduced larches, and of producing cankers and die-back in the absence of frost injury.

Document Type: Journal Article

Affiliations: Associate Pathologist (University, La.), Bureau of Plant Industry, U. S. Department of Agriculture, in cooperation with Osborn Botanical Laboratory, Yale University

Publication date: July 1, 1943

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  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.

    2015 Impact Factor: 1.476
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