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Signs of damage
- Chlorosis and necrosis. Once fungus settles down, it starts germinating, reducing the nutrient amount and affecting the plant's coloration.
- Rotten flower's buds and affected petals. The fungus spreads almost everywhere, including flowers.
- Fruit damage. When it comes to fruit trees, this disease can be especially harmful to the farmers because Alternaria affects fruit interior.
How to prevent
The best way to avoid Alternaria is by buying seeds certified as "disease-free" or treating seeds with hot water, which also reduces the risk of it. Since water is a pleasant space for fungus, you need to control leaf wetness. It's better to rinse plants in the morning, so they dry quicker. But overhead irrigation during the formative period is not welcome. More space is also better for plants, and good air circulation is beneficial in many ways.
As you can guess, fungicides will be very helpful with this disease because it is caused by fungus. And Alternaria is highly sensitive to miconazole and amphotericin. But the most optimal treatment is a combination of medication and removing parts of the plant that were heavily affected.
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