Canadian Forest Service Publications
Damping-off in British Columbia forest nurseries. Control trials with fungicides applied to different quality seeds. 1975. Sutherland, J.R.; Lock, W.; Sluggett, L.J. Environment Canada, Forestry Service, Pacific Forest Research Centre, Victoria, BC. Information Report BC-X-125. 20 p.
Issued by: Pacific Forestry Centre
Catalog ID: 1546
CFS Availability: PDF (download)
Nursery and growth room experiments were made with high, intermediate and poor quality (based on germination capacity and rate) seeds of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco], Sitka [Picea sitchensis (Bong.) Carr.], and white (interior) spruce [P. glauca (Moench) Voss] treated with: Captan, Benlate, and Benlate T fungicides and talc (all applied as post-stratification dusts), and MBC-P (pre-stratification seed soak) fungicide. In the British Columbia Forest Service nurseries at Koksilah and Surrey, none of the treatments had any effects of practical importance on emergence percentage or rate, early and late damping-off incidence or seedling shoot growth of any seedling species or seed quality. Seed quality effects were readily discernible at both nurseries and for all seed species. At Surrey, Douglas-fir shoot growth decreased and early damping-off incidence increased as seed quality decreased. In the growth room, germination capacity and germination speed of treated seeds were improved by some of the fungicides; these effects were not evident in the field. Most germination failure in vitro was attributable to seed decay, but the percentage, based on the number of ungerminated seeds, of decayed seeds was seldom reduced by seed treatments.