Then you can save the fir trees from attack

But how do you know that a tree has been attacked?

Here in the clip above, Mattias Sparf, forest consultant from the Swedish Forest Agency, gives tips on how to find out if your trees have been damaged.

Mattias Sparf also believes that there are forest owners who unfortunately focus on "the wrong tree" when they start to cut damaged areas.

Many times only the brown and dead trees are felled where the fir bark drill has already left the fir tree and only beneficial insects are left. In order to stop the spread of the spruce bark drill, freshly attacked green trees must also be taken care of.

In essence, infected firs are found near previous infestations.

In the clip below he shows which trees you do not need to focus on:

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