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Pine beetle mortality in central Ontario
Last Post 09 Mar 2018 07:32 PM by ISC Staff. 1 Replies.
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11 Oct 2017 05:26 PM
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The white pine is located on the south east shore of Georgian Bay and showed no signs of disease or distress in 2016. The tree gradually lost lustre through the summer 2017 and all foliage browned in early September. Cambium layer riddled with galleries. Cross section of the tree shows sapwood stained blue. The stain is continuous through the outer two inches of the circumference of the sapwood from the base of the tree to within 10' of the crown where it becomes discontinuous. It appears consistent with a mtn pine beetle or southern pine beetle infestation. Two neighbouring pines have also died.

Is this a potential example of either of these pests entering central Ontario?
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09 Mar 2018 07:32 PM
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Thank you for your question!
To obtain the most accurate response, we recommend you email us any photos of the damage and trees in question at, or report the sightings to EDDMapS Ontario (
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