Fungal attack, powdery mildew and scab
Among the most feared diseases in the apple tree are the mildew and the so-called apple scab. In both diseases, however, it is actually not a yellow coloration of the entire leaves, but the following symptoms:
- the leaves show rust-brown spots
- Fruits have black spots with a cracked center
- the spots spread outwards from the center of the leaf
also read
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- Brown leaves on the apple tree
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However, yellow discolored leaves can also be a cause Fungal disease to have. This in turn is not only due to a lack of resistance of the respective Apple variety, but often also on an inadequately executed one Pruning.
The yellow color shortly after transplanting
If the leaves turn yellow shortly after a young tree has been planted or transplanted, this may also be the reason for the damage. Was the planting made for example in the middle of summer or on a hot spring day, the roots of the apple tree may have dried out too much. The reason can also be a lack of water supply or a soil that is too stony with little loose root substrate. For these reasons, planting an apple tree should not only be done with a suitably prepared planting hole of sufficient size and humus substrate are available, but the time should ideally also be chosen in autumn after the leaves have fallen.
Rodents and other pests
The yellow color of the leaves usually indicates a disruption in the sap balance of the apple tree. This can also be due to damage to the root by voles and others Pests lie.
Tips & Tricks
Voles cannot only be driven away by chemical means, mechanical traps and the electronic vole scare. Transplanting the tree trunk with currant bushes provides natural protection, as voles do not like their smell.
