Canadian Forest Service Publications

Studies of western tree rusts. I. A new cone rust on Sitka spruce. 1954. Ziller, W.G. Canadian Journal of Botany 32(3): 432-439.

Year: 1954

Issued by: Pacific Forestry Centre

Catalog ID: 20743

Language: English

Availability: PDF (request by e-mail)

Available from the Journal's Web site.
DOI: 10.1139/b54-039

† This site may require a fee

Mark record


Local damage on the Queen Charlotte Islands to seed of Sitka spruce, Picea sitchensis, has led to the discovery of the causal agent, a new cone rust. At the same time a new Chrysomyxa on the one-flowered pyrola, Moneses uniflora, was discovered in the same area. Evidence from observations in the field, from controlled inoculations, and from the similarity of markings on aeciospores and urediniospores has led to the conclusion that the cone rust is the aecial stage of an undescribed Chrysomyxa. The rust has been described and named Chrysomyxa monesis. It is feared that the rust may cause serious damage to spruce seed abroad unless its spread is prevented. Surface sterilization of spruce seed before export is therefore recommended.