Return of the asian long-horned beetle As reported by the Canadian Food Inspection Agency, the Asian long-horned beetle (ALHB) has once again been found in the Toronto area. As a result, the CFIA has announced the formation of a regulated area in parts of Toronto and Mississauga near Pearson Airport. All tree materials, including nursery stock, […]
Eradication of the asian long-horned beetle Since the original posting of this article the CFIA has again found the Asian long horned beetle in the Pearson airport area. Please refer to the new article “Asian long horned beetle back in Canada” for explanations on the regulated area, disposal of wood and debris and where to […]
Honey Locust Plant Bug (Diaphnocoris chlorionis) Symptoms Leaf distortion Dwarfed leaflets Lack of pigmentation in leaves Tiny irregular holes in leaves Yellow to brown spots Causes One generation of the honey locust plant bug develops each year, and both the young and adult bugs feed on the leaves of the honey locust . They over […]
Toronto arborists provides birch leafminer treatment Birch leafminer, a type of sawfly which originated in Europe and attacks all types of birch trees, has long been a pest in birch trees in the GTA. Signs of the pest can be seen in the damage – translucent brown blotches on leaves: In addition to being unsightly, […]
Emerald ash borer The Emerald Ash Borer (EAB) is an invasive pest that arrived in North America from Asia prior to 2002. Since its discovery in the Detroit area in 2002 EAB has killed millions of ash trees in several American states and in Ontario. EAB is now known to exist in most of southern […]
A disease causing branch dieback in many species of conifers, particularly in Colorado blue spruce. This disease also attacks other two and three needled pines such as mugo, Scots, and red pines.
A caterpillar that defoliates trees. Large numbers of this insect occur at intervals of approximately 10 years.
Diplodia is one of the most common and serious diseases of Austrian pines. It is caused by a fungus which becomes a destructive pathogen when its host is weakened by external factors. This disease also attacks other two and three needled pines such as mugo, Scots, and red pines.
A foliar disease that causes loss of leaves, reduction in fruit yield, and inedible fruit. Common in most types of apple trees, especially common in crab apple trees.