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Proceedings of Past Forest Nursery Association Meetings:

Microbial Mixtures for Biological Control of Fusarium Diseases of Tree Seedlings
Cynthia M. Ocamb, Cynthia A. Buschena , and Joseph O
1996: Salem, OR
Alternatives to soil fumigation with methyl bromide are needed for controlling Fusarium diseases in tree nurseries. Studies are under way for developing microbial mixtures (bacteria & ectomycorrhizal fungi) that control Fusarium diseases of eastern white pine (Pinus strobus L.) seedlings. Greenhouse studies in containerized production have shown that the application of rhizosphere bacteria to conifer seed, coupled with ectomycorrhizal fungi application at sowing, can protect seedlings against Fusarium root rot. Not only do seedlings have a reduced incidence and severity of root rot, they also have greater levels of ectomycorrhizal roots. When applied to seeds for field (bareroot) production, the bacterial strains are associated with increased stand numbers.

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