The emerald ash borer (EAB) is an invasive species that lives in ash trees. Native to China, they are about half an inch in length and were first introduced to Canada in 2002. Emerald ash borers have killed ash trees in more than 260,000 hectares of Ontario forests. Because there are no natural predators, the Canadian Forest Service (CFS) says the beetle kills up to 99 per cent of ash trees in infested areas.
While the insect eats away at foliage, it's the larvae that does the boring. The young tunnel beneath the bark and feed on the layer of live cells between the bark and sapwood, cutting off nutrients and water to the upper portions of the tree. Unfortunately, the intense heat this season is not helping matters. Read more >>