Actually, pines are quite robust and defy all environmental influences. Bark beetles can still be very dangerous to the coniferous tree. Early detection is very important in this case. Here you can find out what signs indicate an infestation and how to save your pine trees from the pest.
The bark beetle leaves tracks
Different species of bark beetles
Pine trees are particularly susceptible to two types of bark beetle:
- the bark beetle that breeds in bark
- and the wood-nesting bark beetle
Bark breeding bark beetle
This pest lays its eggs under the bark of pine trees. Its larvae later feed on the bast tissue, which serves as an important protective shield of the conifer. To a certain extent, the pine tree is able to repel the beetle with a dense layer of resin. However, the pest emits odors that attract other animals. Although mainly weakened trees are visited, even healthy pines don't stand a chance against a mass infestation.
Wood breeding bark beetle
The wood-breeding bark beetle, on the other hand, penetrates directly into the trunk. The female who lays the eggs introduces a fungus that later serves as food for the larvae. Furthermore, it destroys the wood with the construction of countless passages that have a black discoloration.
This makes your jaws vulnerable
External factors weaken your jaws, making it easy for the pest to enter the trunk:
- warm summers (permanent temperatures above 17°C
- broken snow
- dryness
- Storms (encourage mass proliferation)
- bark injuries
symptoms
- from mid-April there is an increased risk
- brown drill dust at the base of the trunk
- Pronounced resin formation (can also indicate other diseases)
- red needles
- needle ejection
- bark falling off
combat
Only early detection can save your jaws in the event of an infestation. Regular checks of the bark are therefore very important. Infested trees must be removed immediately to avoid mass propagation. Also make sure that your jaws do not dry out and seal any damage to the bark. In the event of an infestation, it is best to inform the responsible forestry office in your area.