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99 per cent of unprotected ash trees are killed within 8-10 years of insect entering region

Hundreds of thousands of trees already killed

November 29, 2022  By Turf & Rec

Minnesota Department of Natural Resources photo

The emerald ash borer has wiped out hundreds of thousands of Canadian ash trees since its presence in the country was first reported 20 years ago. Natural Resources Canada says once the invasive insect is introduced to a region, upwards of 99 per cent of unprotected ash trees will be killed within eight to 10 years.


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