If yellow spots appear on the pear tree in spring and summer, this is not a natural phenomenon. His owner also suspects this and feels the desire to help him somehow. But measures only lead to the goal if the cause is found.
Why does the pear tree get yellow spots?
The pear tree is probably infected with theRust fungus Gymnosporangium sabinae. The disease is referred to aspear rust. The pathogen is active from spring to autumn and then overwinters on juniper. A mild infestation is not dangerous. Strengthen your tree with pesticides.
When do the yellow spots appear on the pear tree?
The rust fungus Gymnosporangium sabinae overwinters on an ornamental juniper, for example the Sade tree. Only in spring after the leaves emerge,around May or June, does it switch to pear trees that are within a radius of about 0.5 km with the help of wind. Weakened trees are particularly affected by infection. The spots, which are yellow in the early stages, become larger and more orange-red as the summer progresses and, in the case of a severe infestation, become more numerous. In addition, wart-like growths with spores form on the underside of leaves. As soon as the leaves fall to the ground in autumn, the infection ends and the pathogen switches to the juniper again.
What can I do about yellow spots?
Alight infestation does not need to be fought, because it is usually de alt with well. In any case, for successful, long-term control you would have to find and remove the second host, the juniper. A fungicide is now commercially available, but it is harmful to some wildlife. Concentrate on good care to increase the tree's resistance so that any possible fungal infestation is de alt with lightly.
- fertilize and water optimally
- strengthen with plant remedies
- for example with algae extract or horsetail broth
- collect and dispose of infected leaves in autumn
Are the fruits of the infected pear still edible?
Yes, thefruits remaineven during pear rust diseaseedible The infestation mainly affects the leaves anyway. Only if it is very strong can it disrupt the development of the fruits and deform them. This doesn't change their edibility. However, they fall off before they are fully ripe and therefore cannot be stored for long.
Tip
Red dots on the pear tree come from a pest
If the leaf spots are in the form of dots and are exclusively red, you are most likely not dealing with pear scab, but with the pest pear pox mite. A light infestation does not need to be combated; for more severe infestations you can spray an agent containing wet sulfur.
