Diseases of Containerized Conifer Seedlings
Three major groups of diseases affect containerized conifer seedlings in western North America. These include damping-off/ root diseases, Sirococcus shoot blight, and Botrytis blight. Several other diseases may occur (table 1), but their effects are generally much less severe than these three. Diseases of containerized conifers may proliferate in a greenhouse environment because seedling growing conditions are often conducive to disease development. Therefore, disease impact can usually be reduced by altering environmental factors to reduce pathogen buildup or host susceptibility.
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Author(s): USDA Forest Service