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Home → Publications → National Nursery Proceedings → 1986 → Occurrence of Fusarium on Conifer Tree Seed from Northern Rocky Mountain Nurseries

Occurrence of Fusarium on Conifer Tree Seed from Northern Rocky Mountain Nurseries

Fusarium app. are common colonizers of conifer seed from northern Rocky Mountain nurseries. Assays of ponderosa pine, Douglas-fir, western larch, and spruce seeds indicate great variability in extent of contamination among seedlots. In some spruce seedlots almost 90 percent of the seeds tested were colonized by Fusarium most seedlots of other species were much less contaminated. Fusaria are commonly found both on the seedcoat and within the endosperm of colonized seed. Seven species of Fusarium have thus far been isolated from seed, although F. oxyagorum was encountered most frequently. Types of diseases associated with aeedborne fusaria and techniques used to reduce levels of seed contamination are discussed.


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Author(s): Robert L. James

Publication: National Nursery Proceedings - 1986

Event: Combined Western Forest Nursery Council and Intermountain Nursery Association Meeting
1986 - Tumwater, WA