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Proceedings of Past Forest Nursery Association Meetings:

Seedborne Diseases of Southern Pines and Developing Strategies for Their Control
Stephen Fraedrich
1996: Gatlinburg, TN
Plant pathogenic fungi such as Lasiodiplodia theobromae (the black seed rot fungus) and various Fusarium spp., most notably Fusarium subglutinans (the pitch canker fungus), are the causes of seedborne diseases in southern pines. Seeds contaminated and infected by pathogenic fungi may cause problems that could adversely affect pine seedling production in nurseries. Recent problems with mortality of longleaf pine seedlings caused by F subglutinans, and the association of this fungus with seeds, underscore the importance of developing a better understanding of pathogenic, seedborne fungi and the means to control them. Strategies for the control of various seedborne diseases may differ based on the epidemiology of the diseases, and the biology of the host and pathogen. This paper provides a brief review of seedborne fungal problems that affect southern pine seeds, and discusses established and potential control practices as well as current research efforts.


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