Bookworm damage to forests has increased in recent years

The finger shows a small round hole on the spruce frame, from which there is a bite of the bite after the beetle beetle dug into the egg. — A round hole in the trunk of a fir tree, from which chewing gum gushes out when a bookworm beetle burrows into the tree to lay its eggs. Archival photo from July 2024.

Damage to forests caused by bookworm has increased, especially in the past decade, according to inventories by the Natural Resources Institute Finland and statistics on insect damage by the Forestry Commission.

As the climate warms, insect pests are expected to increase further.

Insect damage reduces the quality of the wood and its sale value.

The Natural Resources Institute of Finland has estimated that the share of financial losses caused by forest fires accounted for by accountants is around EUR 4.5-12 million annually.

Bookworm damage to forests has increased in recent years

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