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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 26, Number 2 (1975) → Seed-protectant fungicides for control of Douglas-fir and ponderosa pine seedling root rots

Seed-protectant fungicides for control of Douglas-fir and ponderosa pine seedling root rots

The USDA Forest Service nurseries at Wind River, Carson. Wash., and at Bend. Oreg.. have periodically suffered large losses of seedlings to root rot fungi. Several promising seed-protectant materials were evaluated in controlled environmental chamber tests for their effectiveness in preventing losses of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and ponderosa pine (Pinus ponderosa Laws) seedlings to pre- and post-emergence damping-off caused by Pythium and Fusarium spp. Of the seven materials tested only thiram and captan are currently registered for use as seed protectants on forest tree seeds (4).


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Author(s): David W. Johnson, Robert D. Harvey, Jr.

Publication: Tree Planters' Notes - Volume 26, Number 2 (1975)

Volume: 26

Number: 2