Mirabelle plums are small, sweet and tasty. It would be a shame if crop yields were reduced by pests and diseases. To avoid this, you should act quickly.Choose resistant varieties The best protection against diseases and pests with the Mirabelle begins with the selection of varieties. Many parasites, fungi and typical tree diseases can occur in mirabelles.
But if you decide from the start for resistant varieties that are resistant to most diseases and pests, you are on the safe side. An infestation cannot be completely ruled out, but it happens much less often than with susceptible varieties.
You should watch existing trees carefully, you will notice changes immediately and you can intervene in good time.
Overview: Common diseases in mirabelles
Scrap shot disease
You can recognize the shotgun disease by round, red-brown spots on the young leaves. In the later stage the leaves get small holes, then they dry up and finally fall off. The lower part of the mirabelle tree or shrub is usually more affected. You can prevent this with a regular clearing cut and a free, open location. An airy crown is good protection. In addition, moderate fertilizers are useful to strengthen the plant. A special pesticide helps with permanent infestation.
The Monilia peak drought is caused by a fungus. The disease appears immediately after flowering. Shoot tips, leaves and flowers look crumpled. On the first fruits there are rots that spread quickly to the whole fruit. The fruits get brownish spots. Always collect infected branches, twigs and fruits immediately and dispose of them so that the disease does not progress. A prevention cut is again useful for prevention.
Sharp disease is rare, but when it does occur, the tree can usually not be saved. It is a viral disease that is transmitted by aphids. Leaves and fruits get white-brown spots. As "first aid" remove all affected plant parts. Do not compost, but burn or dispose of in the household waste! Sometimes the disease can still be contained. Cut the Mirabelle back, with a little luck it will recover and wear again the next year.
Overview: pest infestation on mirabelles
Already in spring, the frost tensioner or its larvae attack the leaves and shoot tips. You can recognize the infestation by clear feeding spots. The small, inconspicuous butterfly lays its eggs on the mirabelle plum. Small, green caterpillars will be on the road from May.
You can protect the mirabelle on the trunk with glue rings, so that you can stop the raid of the butterfly larvae.
Rolled up leaves often indicate aphids. The parasites sit on the top and bottom of the leaves. As mentioned above, aphids can transmit the critical scar disease. But even if that's not the case, you need to get rid of the lice.
Control the pests with a nettle - spray every few days until the aphids have disappeared.
Another sign on the leaves: they turn yellow, curl up and fall off. Then the red spider is usually at work. The red spider is very small and almost invisible to the naked eye.
The best antidote is natural predators, for example ladybugs, lacewings or predatory mites. If necessary, a chemical control agent also works - but please use it sparingly. Affected parts of plants and fallen leaves must be disposed of thoroughly.
" Basically: The healthier and stronger the Mirabelle tree, the less chance there are of pests, fungi and viruses. In addition to choosing a resistant variety, an airy tree top and a plant fertilizer tailored to the Mirabelle are the best protection.