Monthly Archives: November 2012

Hemlock Borer

Hemlock borer requires a stressed or weakened host. The two major causes of stress for hemlock are defoliation and drought. Susceptibility to drought results from the fact that this conifer is very shallow-rooted and typically does best on moist-to-wet sites.

Posted in Environmental Issues, Pests and Diseases Tagged with: BC, borer, british columbia, hemlock, hemlock borer, larvae, ontario

Chalara Dieback of Ash (Chalara fraxinea)

Chalara fraxinea is being treated as a quarantine pest under UK national emergency measures; it is important to report any suspected cases. The disease caused by the Chalara fraxinea fungus results in leaf loss and crown dieback in ash trees,

Posted in Environmental Issues, Pests and Diseases Tagged with: ash, chalara fraxinea, dieback, fungus, insects and diseases, tree, UK

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