Cylindrocladium: Colonization, Growth, And Survival In Nursery Soils In West Virginia And Pennsylvania
Forest tree nursery seedling diseases in West Virginia and Pennsylvania, incited by Cylindrocladium scoparium , have resulted in significant mortality of both hardwood and conifer species. This species of Cylindrocladium along with other plant pathogenic species of the genus are difficult, if not impossible, to control once they infest soil. Soil-borne propagules of C. scoparium can colonize leaves, pine needles, and woody materials present in the soil. These organic substrates provide food and sites for overwintering for these fungi. The cylindrocladia can move through the soil via water and by various cultural practices employed by nursery personnel. Soils within the nursery, not previously cultivated, usually do not possess C. scoparium unless they receive water from infested seedbed soils or soil containing the fungus. Low areas within a seedbed (infested with C. scoparium) usually have higher densities of the plant pathogen, thus seedlings in these sites are usually more symptomatic (diseased). Soil from infested nursery soil appears to be the primary way in which the fungus is spread throughout the nursery. Nursery personnel must take certain precautions within their nurseries once C. scoparium is detected in nursery soils.
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Author(s): Barry B. Hunter, Barry Towers
Event:
Northeastern Area Nurserymen's Conference
1986 - State College, Pennsylvania
