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Home → Publications → Seed and Seedling Diseases in the Western US → Fungal Colonization of Residual Conifer Seedling Roots in Soil-USDA Forest Service Lucky Peak Nursery, Boise, Idaho

Fungal Colonization of Residual Conifer Seedling Roots in Soil-USDA Forest Service Lucky Peak Nursery, Boise, Idaho

Residual conifer roots from previous seedling crops were sampled at the USDA Forest Service Lucky Peak Nursery, Boise, Idaho for extent of fungal colonization by potential pathogens and antagonists. Samples at the beginning of the second growing season yielded higher levels of Fusarium (primarily F. oxysporum) than those at the end of the first growing season. Different nursery fields had different levels of Fusarium root colonization. Fusarium oxysporum was also common within rhizosphere soil adjacent to residual roots. Roots left in soil can provide an important source of Fusarium inoculum for infection of subsequent conifer seedling crops. Interactions between Fusarium inoculum and microbial ecology are discussed in relation to disease management.


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Author(s): USDA Forest Service