- Black spot on roses, caused by the fungus Diplocarpon rosae, is a common disease that threatens shrubs.
- In winter, the fungus lives in old shoots and leaves, so regular raking and sanitary cutting are crucial.
- Symptoms include black spots with a yellow border, leading to the bush becoming bare, and the spores are easily carried by the wind.
- Discover how milk can become a natural fungicide and effectively protect your roses against disease!
What is black spot on roses?
The beginning of the growing season is a time of increased plant care. Removing winter covers and fertilizing for the first time in the season not only stimulates plants to grow better, but also strengthens their immunity and protects against attacks. Heat, moisture and old fragments of plants and inflorescences can lead to the multiplication of fungi that are responsible for dangerous diseases. In the case of roses, it is black spot.
. The fungus responsible for it is Diplocarpon rosae, which overwinters in old shoots and fallen leaves. The most important preventive measure against black spot is regular raking and removal of fallen leaves and faded flowers, as well as sanitary pruning to remove dry and diseased shoots. Once every few years, it is also recommended to carry out rejuvenation pruning, which protects against the bush becoming too dense. Too many shoots not only limit access to sunlight, but also facilitate the multiplication of fungal spores.
Black spot on roses, as the name suggests, manifests itself as small black spots with a yellow border. It leads to complete yellowing of the leaves. A severe infection leads to the bush becoming bare. Strong winds can also spread mushroom spores to other shrubs. The most effective ways to combat black spot on roses include fungicide-based sprays.
Mix with water and spray the roses. This is how you will protect your roses against black spot
Spring is a good time to carry out protective spraying. They will strengthen the rose bushes and make them more resistant to fungal attacks. Before you spray, remember to clean the bush of organic residues that may contain spores. Remove old shoots and always disinfect the garden tool you use.
Professional gardeners indicate that the best protective Fresh milk straight from the cow works best, but you can also use pasteurized fat milk. Mix a liter of milk with 1.5 liters of water and pour into a spray bottle. In early spring, spray your roses abundantly once a week. If the first symptoms of the disease appear on the bushes, you can spray more often. Milk is safe for plants. It strengthens the condition and limits the multiplication of fungi. Milk is considered a natural fungicide. The proteins it contains create a protective layer on plants, limiting the growth of fungi.
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