Canker and Stem Diseases
[VERIFY]
13 host plants
Last updated
Data Coverage 2 of 6 dimensions
Canker and stem diseases produce lesions on tree trunks and branches of various hosts. You notice sunken areas that discolor and stain underlying wood. These fungal diseases favor stressed trees and wounded bark. Maintain tree health, prevent mechanical injury, and remove infected branches.
Prune out cankered branches at least six inches below visible symptoms, making cuts into healthy wood. Sterilize your tools between cuts. Canker pathogens typically enter through wounds, so minimize pruning injuries and avoid working on trees when bark is wet. Maintain tree vigor through proper watering and avoid stress from drought or compacted soil, which makes trees more susceptible.
Quick Reference
Causal Agent
[VERIFY]
Host Plants
13
Host Plants (13)
Alnus alnobetula Circumpolar alder group Alnus alnobetula subsp. crispa American Green Alder, Mountain Alder, Green Alder Alnus alnobetula subsp. sinuata Sitka Alder, Wavy Leaf Alder Alnus cordata Italian Alder Alnus glutinosa Common Alder, European Alder, Black Alder Alnus incana subsp. rugosa Speckled Alder Alnus incana subsp. tenuifolia Thinleaf Alder, Mountain Alder Alnus japonica Japanese Alder Alnus rhombifolia White Alder Alnus rubra Red Alder Alnus rubra f. pinnatisecta Cutleaf Red Alder Alnus sinuata Sitka Alder Rhamnus alnifolia Alder Buckthorn, Glossy Buckthorn, Breaking Buckthorn