Viburnum borer

Almost all types of viburnums have become susceptible to viburnum borer. This insect tunnels into the stems at, or slightly below ground level. Look for damage in this area. Stressed plants are more likely to become infested. Water properly to avoid drought stress and renewal prune if appropriate to keep plants vigorous.  Symptoms may be a curling and stunting of leaves and premature fall color, as well as dieback of some portions of the plant. Insecticide treatments require multiple applications are warranted only on high value plants.

By Jean Ferdinandsen

Wachtel Tree Science

Certified Arborist # WI0149A

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