LEARN TO IDENTIFY COMMON TREE DISEASES IN ALBERTA
Many diseases can affect your trees, whether that means stunting their growth or even causing them to die. Early detection of any disease is the best way to save your trees, so being able to identify a diseased tree is very helpful.
To help you learn how to identify and manage common tree diseases in Alberta that affect various tree species, your Edmonton arborists at All Season Tree Service have created this helpful guide that includes information such as how to manage the symptoms. If your trees have been infected with any of these diseases, be sure to contact us and we’ll help you with a disease consultation or tree removal in Edmonton.
Now you can use our handy search bar below to browse through some of the common tree diseases that are found in the Edmonton area and across Alberta.
ARMILLARIA ROOT ROT – ARMILLARIA MELLEA COMPLEXE
CANKER OF SPRUCE – LEUCOSOMA KUNZEI SACC.
Management: Watering affected trees may alleviate stress; cut branches with reddened needles and clean shears between branches; reinvigorate the tree with balanced fertilization
CYTOSPORA CANKER – VALSA SORDIDA
Management: Remove wilted and dead limbs; treat all pruning cuts immediately; disinfect your pruning equipment after each cut
HEART ROT DISEASE – ASCOCORYNE SARCOIDES
Management: Minimize pruning wounds that expose heartwood and shape trees at an early age so major branch removal isn’t necessary later
LARCH DWARF MISTLETOE – ARCEUTHOBIUM LARICIS
PINE NEEDLE CAST – LOPHODERMELLA CONCOLOR
RED HEART ROT – STEREUM SANGUINOLENTUM
BRONZE LEAF DISEASE – APIOPLAGIOSTOMA POPULI
ELM SCALE – GOSSYPARIA SPURIA
Management: European Elm Scale is easily treated with soil-applied insecticides, as well as systemic products that are applied at the base of the tree and distributed through the root system. By law, Elms in Calgary should only be pruned between October 1st and March 31st in order to prevent the spread of Dutch Elm Disease.
FIRE BLIGHT – ERWINIA AMYLOVORA
OYSTERSHELL SCALE – LEPIDOSAPHES ULMI
Management: This pest reproduces only once per year, during a period of approximately 10 days occurring in early to mid-June. Horticultural oil can be applied at this time in an effort to suffocate the pest inside its permanent shell. Natural remedies include the introduction of natural predators of oystershell scale, such as ladybugs or lacewings. Pruning is often the most effective remedy.
DUTCH ELM DISEASE – OPHIOSTOMA NOVO-ULMI
OAK WILT – BRETZIELLA FAGACEARUM
Management: There is no permanent cure for Oak Wilt, so prevention offers the most likely method of control. Do not prune oak trees in the spring and summer months; take care to protect susceptible trees from injury during this period and use tree paint to cover any wounds that might occur. Injections of propiconazole, a fungicide, into the roots can help prevent transmission, as well.