Evaluation of Seed Disease Effects in Container-Sown Sitka Spruce
An equation is given for estimating the proportion of empty cavities, or cavities with multiple germinants, in relation to Caloscypha fulgens-caused disease incidence and viability of container-sown Sitka spruce seed. The proportion of nondiseased seeds germinating in the presence of a given number of diseased seeds declined with cool temperature pretreatments greater than 5 days, at a rate that increased with the number of diseased seeds per cavity, but which was independent of the seed lots used. There was no selective mortality of faster or slower germinating seeds in the presence of disease. An example is given of the use of the equation, and the extension of the method to seedbed nurseries discussed. Forest Sci. 29:59-65.
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Document Type: Journal Article
Affiliations: Research Technicians, Environment Canada, Canadian Forestry Service, Pacific Forest Research Centre, 506 West Burnside Road, Victoria, British Columbia, V8Z 1M5, Canada
Publication date: 1983-03-01
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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.
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