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Black spot is caused by a fungus. The spots on the leaves are round and very dark. They merge with each other and begin to occupy a larger and larger area, thus creating one large black spot. As a result of the disease, rose leaves wither and fall off. affected plants are weakened, stop growing and become very sensitive to frost. Take action as soon as you notice black dots on the leaves.
Black spots on roses. Where do they come from?
Black spot appears on the leaves as a result of prolonged rainy weather, watering the flowers from above the leaves, unsuitable soil and too densely planted bushes. Over time, spots also appear on the stems and calyxes. The disease is transmitted by insects and water droplets. However, it can be prevented. Roses should be planted in sunny positions, watered close to the ground and rake fallen leaves. If black spots have already appeared and spread, cut off the infected shoots and disinfect the tools.
Black spot. Mix with water and spray the roses
If you want to cure roses, you do not need to reach for specialized chemicals available in stores. You can make a natural and organic mix at home, and you only need two ingredients. Dissolve a teaspoon of soda in a liter of water. Mix and pour into a spray bottle. Spray your roses with the mixture once a week and you’ll quickly see an improvement. Regularly remove weeds around the plant.
Source: Gazeta
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