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BIRCH DIEBACK OFTEN A RESULT OF A TREE KILLING PEST


Bronze Birch Borer

Maureen Sexsmith-West ISA Certified Arborist, PR4600A Many Birch trees in our area are affected by the arrival of this pest. Since then, many Birch have been removed. Left un-addressed, an infested tree can be dead in as little as two-three years.

Photo Source: entomology.unl.edu – BBB Larvae under bark

There is good news for the Birch that remain in the City. In the past, what has made it difficult to control is that the pest feeds under the bark before emerging as a reproductive adult. The only method of control had been pruning out infested and dead limbs, appropriate irrigation, fertilization programs and pest management of other problems such as leaf miner/aphids to promote tree vigour. The other option, unfortunately, was removal.

Observing adult emergence while doing diagnostic in Coaldale

There still remains many seriously infested and mostly dead trees throughout the City. I realize that the cost of removal can be daunting for many on a fixed or limited budget. By leaving infested trees in place, you put otherwise healthy trees at risk. New methods for control were approved earlier this year. Contact Grant at 403 327-9109 to see if your tree is a candidate.



To help prevent the spread of this devastating insect, PLEASE do not store infested birch firewood and remove trees in serious decline. Be observant to changes in your trees. Regular maintenance programs can save your tree.

BIRCH PRUNING SEASON – JULY AND AUGUST ANNUALLY


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