Ruff's Greeenhouses
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Timber Damaged by Forest Pests, 1994/95

Ips typographus

3,411,000 cubic metres

Of all the forest insects, diseases and mammal pests in the Prince George region, the spruce beetle is the most destructive, particularly in the Mackenzie district. Forest districts with beetle infestations develop beetle management plans in consultation with forest licensees and the public. These plans may call for the removal of infested trees and the use of trap trees to help reduce further damage.

What to look for in the forest..

Adult females lay eggs along a linear gallery system from which larval galleries radiate, becoming wider as the larvae grow. This pattern shows in both the bark and in the surface of the wood, and is unique to Ips typographus. This symptom should be looked for on any dead trees, whether standing or fallen. The beetle is often associated with windblown, damaged and recently felled trees where it builds up in numbers before moving on to attack adjacent live trees. Inspection of trees in this category should be a high priority. Look also for individual or groups of dead trees. This arises when the beetles 'mass-attack' trees, overcoming the normal tree defences by a combination of large numbers of beetles and a blue stain fungus carried by the adults. This phase can lead to extensive tree mortality.

Contact Information
Phone: 250-963-9815
Fax: 250-963-3134


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