What is it? Hypoxylon canker is a fungus that occurs mostly on trembling aspen, also on other poplars and various hybrid poplars like balsam poplar, columnar aspen. It causes trunk cankers, which can eventually girdle and kill the tree. Symptoms Damages What to do? Other resource: https://tidcf.nrcan.gc.ca/en/diseases-caused-by-pathogens/factsheet/15
What is it? Boxelder bugs are native insects that feed on Manitoba maples (aka boxelders) and can also be found on ash or other maple species. They are harmless to trees and humans, but their massive numbers can be a nuisance. Symptoms Damages What to do? Other resource: https://www.calgary.ca/parks/pests/boxelder-bugs.html
What is is? Satin moth is an introduced insect that the caterpillar feeds on leaves of poplar species, willow and oak. Symptoms Damages What to do? Other resources: https://www.calgary.ca/parks/pests/satin-moth.html https://tidcf.nrcan.gc.ca/en/insects/factsheet/9504
What is it? Spruce broom rust is a native fungi that alternates its life cycle between two hosts: spruce and bearberry(kinnikinnick). It weaken the tree and also affects the aesthetic of the tree. Symptoms Damages What to do? Other resource: https://tidcf.nrcan.gc.ca/en/diseases-caused-by-pathogens/factsheet/1000053
What is it? Cedar apple rust, cedar hawthorn rust (juniper hawthorn rust), and cedar quince rust are the most common cedar rust diseases. They are rust fungi that require two different hosts, one evergreen and one deciduous, to alternate and complete their disease cycles. Evergreen hosts include red cedar or juniper, while deciduous hosts include […]
What is it? Fire blight is a destructive bacterial disease of fruit trees in North America. It is often seen in crabapple, apple, mountain ash, hawthorn, plum, cotoneaster, raspberry, flowering almond, and saskatoon. Fire blight can spread through rain, wind, insects, birds, and contaminated pruning tools. Symptoms Damages What to do? Other resources: https://tidcf.nrcan.gc.ca/en/diseases-caused-by-pathogens/factsheet/176 https://www.calgary.ca/parks/pests/fire-blight.html
What is it? The yellow-headed spruce sawfly is a native North American insect with a distinctive dark yellow head. It attacks spruce trees, consuming new and then old needles, which can cause severe defoliation and death. Symptoms Damages What to do? Other resources: https://www.calgary.ca/parks/pests/yellow-headed-spruce-sawfly.html https://tidcf.nrcan.gc.ca/en/insects/factsheet/7875
What is it? White pine weevil is a native insect in North America, it is brown in color. It attacks leaders (the top) of both spruce and pine, causing dead top of the tree. Damages What to do? Other resources: https://tidcf.nrcan.gc.ca/en/insects/factsheet/1847
What is it? Spruce spider mites are microscopic in dark green to dark brown color. They begin feeding around mid-May, continuing their activity throughout the entire growing period. They mainly attack conifer such as pine and spruce, by sucking out the sap from the needle. They can generate multiple generations annually, leading to reduce tree […]
What is it? Poplar bud gall mite is microscopic mite that is hardly noticeable. It attacks poplars, cottonwoods, and aspens by sucking the sap from the buds, and swelling into woody galls. Damages What to do? Other resources: https://tidcf.nrcan.gc.ca/en/insects/factsheet/50