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Proceedings of Past Forest Nursery Association Meetings:

Organic Soil Amendments as Potential Alternatives to Methyl Bromide for Control of Soilborne Pathogens in Forest Tree Nurseries
M. E. Kannwischer-Mitchell, E. L. Barnard, D. J. Mitchell, and S.W. Fraedrich
1994: Williamsburg, VA
In a multi-year project, pine seedlings are being grown in nurseries in Florida and South Carolina to evaluate the effects of organic amendments on the development of disease and potential management of plant pathogens over time without the use of soil fumigants. Seedling survival, plant quality and outplant performance are being evaluated. The study in South Carolina is currently in its first year and the study in Florida is midway through its second year. Although pathogenic fungi, including species of Fusarium, Macrophomina, Pythium, and Rhizoctonia, and plant parasitic nematodes (Mesocriconema, Paratrichodorus, and Tylenchorenchus spp.) have been detected, no serious disease development has been observed. At the end of the first growing season in the Florida nursery, seedlings from fumigated plots were taller than plants from control plots. The sizes of seedlings from amended plots, however, did not differ from sizes of plants from either fumigated or control plots.
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