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Hemlock trees in Ontario threatened by invasive aphid-like insect found in two regions

Insect sucks sap from trees' needles

September 6, 2022  By Turf & Rec

Another tree species in Ontario is under threat by an invasive insect. Hemlock trees, which are important in ecosystems and whose wood is preferred in certain products, are being threatened by the hemlock woolly adelgid, a type of aphid that sucks sap from the base of the trees’ needles, eventually killing the trees. So far, the insect has been discovered in Cobourg – east of Toronto – and in the Niagara Region.


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