If your chestnut, no matter what kind, has brown leaves or brown spots on the leaves as early as summer, then they urgently need your help. Before doing this, however, you should research the causes of the brown leaves.
The chestnut leaf miner is the most common cause of brown leaves on chestnuts
Although you cannot always remedy the situation immediately, you can at least ensure that this problem does not occur again next year and thus protect your chestnut from possible damage in the long term.
Where are the brown leaves from?
Sunburn, for example, is a possible cause of the brown leaves. Although the chestnut likes a sunny location, the leaves can burn, especially on a young tree. The danger increases the longer a possible drought lasts and the less water your chestnut gets. Don't forget your chestnuts in the bucket.
While sunburn only causes short-term damage, brown leaves caused by the chestnut leaf miner should not be underestimated. The larvae of this pest like to hibernate in fallen leaves and in the ground. The next year they infest the chestnut again and can significantly weaken the tree in the long run. This is especially true for younger chestnuts.
Leaf blight, or leaf roll disease, first causes spots, then later wilts and curls the leaves, as the name suggests. It is caused by a fungus called Guignardia aesculi.
The main causes of brown leaves:
- sunburn
- chestnut leaf miner
- leaf tan
tips
Always remove and dispose of prematurely fallen leaves as soon as possible to prevent the spread of leaf disease.