Notes: Effect of Triadimefon (Bayleton) on Ectomycorrhizae of Loblolly and Slash Pines in Alabama

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Effect of the systemic fungicide triadimefon (Bayleton ┬«) on growth and development of selected ectomycorrhizal fungi of loblolly and slash pines was determined in laboratory and field studies. In the laboratory triadimefon exhibited activity against all of the test fungi on culture media; however, the concentrations of triadimefon necessary to restrict colony areas by 50 percent or more generally were higher than would be expected to occur in soil following recommended rates of application. A possible exception to this was the symbiont Pisolithus tinctorius, where a triadimefon concentration of only 1 g/ml restricted colony area by 50 percent and no growth occurred at a concentration of 5 g/ml. In field studies, no effect on mycorrhizal roots was observed on seedlings collected in August and September from plots that had received triadimefon treatments in May and June. Triadimefon also did not affect seedling height or the distribution of P. tinctorius and Thelephora terrestris basidiocarps among the plots. Forest Sci. 28:232-236.

Keywords: Bayleton®; Pinus elliottii; Pinus taeda; Pisolithus tinctorius; Thelophora terrestris; forest tree nurseries; systemic fungicide

Document Type: Miscellaneous

Affiliations: Associate Professor, Botany, Plant Pathology, and Microbiology Department, Auburn University Agricultural Experiment Station, Auburn University, AL 36849

Publication date: June 1, 1982

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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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