Brown spots and brown leaves
The yucca is called a palm because its appearance suggests this. But that is not correct. It is actually an asparagus plant. That shouldn't prevent us from continuing to think of it as a palm tree. And we always expect green leaves from such a plant.
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Occasionally, individual leaves may turn brown, dry up and eventually fall off. Usually only a few specimens are affected, which are at the bottom of the trunk. This is part of the aging process and is not a cause for concern.
If, on the other hand, there are spots on many leaves in the middle of the green, this must be investigated. There can be various reasons for this. One trigger we won't be pleased about can be the Leaf spot disease be.
This is how leaf spot disease manifests itself
Leaf spot disease shows itself, how can it be otherwise, by forming unsightly, unevenly shaped spots. It covers more and more leaves with it. The spots get bigger and bigger and can melt together. They are brown to black in color. Broad-leaved yucca varieties are particularly often attacked.
If the leaf spot disease is not dealt with as quickly as possible, the palm may die completely at some point.
Favoring factors
The leaf spot disease usually affects a weakened yucca. In order for it to come to that, care mistakes must have been made beforehand. It may be that this is also unintentional or happened ignorantly. These are the possible causes of the weakening of the yucca:
- Waterlogging in the root area
- missing or insufficient drainage layer
- too high humidity
- cold location
- lack of ventilation
Ways to fight it
Immediately remove all infected leaves and dispose of them with household waste. Wash your hands thoroughly afterwards, as this disease is caused by fungal pathogens. Otherwise these can easily be transferred. Many Houseplants can namely suffer from leaf spot disease. For example the Rubber tree or the camellia.
If necessary, you can also look around in stores for pesticides. However, only use the remedy if it is the only chance for the yucca. It is also essential to follow the manufacturer's instructions. Unfortunately, no home remedy can help combat these fungal pathogens.
Tips
It is best to repot the yucca or replace the top layer of soil. Fungal pathogens can reach the substrate through fallen diseased leaves, which can survive there for a long time.
