While one hand nourishes and nurtures, the other destroys ... The fight against the two largest invasive usuryers - eucalyptus and acacia - is that of the long haul. We learned from Justin how you can best do that. Those who want to learn something about trees, read on.
There are two things that motivate these tree species to start growing again: burning or being cut down. What do you have to do to get rid of them then? There are different ways:
- Pull the tree root and all out of the ground. That is what we have done on the new terraces. The disadvantage is that the soil becomes unstable with a high risk of erosion.
- Glyphosate, the active substance in Roundup. Not an option, because it poisons our own water and habitat.
- Interrupt the water management of the tree. You do this by removing a ring from the tree bark. This is not possible with young trees, because the skin of the tree is still too thin.
- Stop photosynthesis by defoliation of the tree. This is not difficult with eucalyptuses. You cut the trees (those of 1.5 years old are already at least 6 meters high!) with the chainsaw at about one meter above the ground (with which you have 90% of the leaves) and then you saw off the last branches with three strokes. The defoliation of acacia is really a monkish work, because this tree makes a lot of new shoots with many side branches and leaves. Moreover, the acacia produces many more seedlings.
And then the trick is to replace the exotic tree species with native ones, such as oak and medronhos. We thank Renature Monchique for the baby trees!