Spruce cone rusts
- French disease name: Rouilles des cônes de l'épinette
- Pathogen name: Chrysomyxa monensis Ziller
- Class: Uredinales
Distribution
Western Canada
Damage, symptoms and biology
These rusts periodically damage cones in localized forest areas and can be a serious problem in spruce seed orchards.
Other information
Seeds are not usually formed in diseased cones, and even when they are produced, malformation and resinosis of the cones hinder seed dispersal or extraction. Those seeds that are formed tend to weigh less and have poor germination.
Canadian Forest Service Publications
Information on host(s)
Main host(s)
Photos
Chrysomyxa pirolata aeciospores produced beneath the cone scales of spruce cones
john Dennis
Orange-yellow urediniospores produced in uredinial pustules
Jack Sutherland
Chrysomyxa pirolata aeciospores produced beneath the cone scales of spruce cones
Jack Sutherland
Chrysomyxa pirolata aeciospores produced beneath the cone scales of spruce cones
Jack Sutherland
Chrysomyxa pirolata uredinia on the lower surface of a wintergreen leaf
Jack Sutherland
Chrysomyxa pirolata urediniospores
Jack Sutherland