Content
Rust on rose leaves is one of the most popular diseases of ornamental plants. This infection spreads quickly and can cause the death of the flower. Rose fungicides are used to treat leaf rust. You can also get rid of stains using numerous traditional methods.
What does rust look like on roses?
The first signs of infection usually appear in the spring. The degree of rust damage depends on the variety of rose, the age of the bush and the stage of the disease.
The main symptom of rust is yellow or orange powdery spots.
The disease usually appears on the lower part of the leaf blade on roses. It looks like small yellow specks, the number of which gradually increases. These are small fungi that quickly reproduce by spores.
Subsequently, the infection penetrates into the leaf tissue. After a few weeks, the plates begin to turn yellow, become completely covered with rusty spots, wither and dry out.
In later stages, the disease also affects rose shoots
During the flowering period, rust can spread to the buds. The fungus interferes with the normal flow of photosynthesis in rose cells. At the same time, the infection absorbs the nutrients that the plant has managed to accumulate. As a result, the bush begins to discolor from a lack of chlorophyll. If left untreated, the plant becomes very weak and subsequently dries out or freezes in winter.
Reasons for appearance
Rust is caused by fungi from the genus Gymnosporangium. Most often, the infection affects coniferous plants, especially juniper bushes. The appearance of rose rust disease is usually due to the fact that the plant is weakened by unfavorable factors affecting it.
The appearance of spots on leaves can be caused by:
- violation of the watering regime;
- increased air humidity at low temperatures;
- violation of landing technology;
- excess nitrogen in the soil;
- poor plant aeration;
- the presence of wilted buds on the bushes.
Improper use of organic fertilizers can lead to disease
Often roses become infected with rust from other plants on the site. This indicates the need to periodically check all bushes for symptoms of the disease.
How dangerous is the disease?
Rusty spots on leaves are considered one of the most dangerous infections. Most rose varieties are susceptible to fungi. Infection leads to a number of negative consequences.
Among them:
- loss of decorativeness;
- lack of flowering;
- premature wilting;
- the spread of fungi from the rose to the leaves of other plants in the garden;
- potential for bush death.
Rust poses the greatest danger to young plants. They show less resistance to the disease.
What to do and how to treat rose leaves against rust
First of all, the plant must be carefully examined to determine the degree of infection. If there are a small number of small rusty spots on the leaves, treatment is sufficient. At later stages, the affected shoots are removed to prevent the infection from spreading to healthy stems.
Fungicides
If the leaves of a rose are covered with rusty spots, it is recommended to use potent antifungal drugs. Fungicides disrupt cellular metabolism and create conditions for the death of pathogenic microorganisms. Below are the most effective drugs against rust on rose leaves.
Fitosporin-M
Antifungal agent with a broad spectrum of action. It is a bacterial fungicide. The active ingredient is microorganisms that suppress the fungus without harming the diseased plant.
To spray rose leaves, use “Fitosporin-M” in powder form. Take 15 g of the drug per 10 liters of water. The diseased bush is sprayed at intervals of 7 days until the spots on the leaves disappear.
Topaz
Systemic biological fungicide, used for flowering and fruiting plants. It is characterized by high effectiveness in treating the disease and rapid action. The product suppresses the growth of rust on leaves, protects healthy shoots and rose flowers from infection.
The drug is released in ampoules of 2 ml. It is diluted in 5 liters of water and sprayed on the diseased bush.
It is recommended to spray roses in windless, dry weather.
Repeated treatment of leaves against rust is carried out after 10 days. The fungicide does not have phototoxic properties and is therefore safe for the plant.
Strobe
The drug is in the form of soluble capsules for the preparation of a liquid solution. The product is highly effective in the first 3-4 hours after spraying.
Sick plants are treated 3 times with an interval of 10 days. 1 g of the drug is dissolved in 10 liters of water.
The solution must be prepared immediately before the procedure. To increase efficiency, you can combine Strobi with other fungicides.
Baktofit
It is a bacterial fungicide in powder form. Treatment of roses against rust is carried out by spraying. For 10 liters of water, 20 g of powder is required. The procedure is repeated after 7 days.
Ways to treat roses from stains:
"Baktofit" can also be added to water for irrigation. It is advisable to carry out the procedure to protect the roots and prevent the entry of fungi from the soil. For 10 liters of water for irrigation, take 30 g of powder.
Folk remedies
Experienced gardeners recommend treating rusty spots on rose leaves not only with fungicides. Antifungal drugs can be supplemented with folk remedies, which are no less effective in fighting the disease.
Wormwood decoction
This product is actively used against rust and powdery mildew. The components contained in wormwood suppress fungi.
Cooking method:
- Grind 400 g of dry leaves and shoots of wormwood.
- Place in a metal bucket.
- To fill with water.
- Boil.
- Cook for 5-7 minutes.
Wormwood decoction can be stored in a jar for 2-3 days
When the liquid has infused and cooled, it must be diluted with water in a ratio of 1 to 1. The decoction is used to spray the leaves and soil around a bush with rust.
Soapy water
The product has a pronounced antibacterial and antifungal effect.The disadvantage of this method is that to achieve the result it is necessary to spray the rose leaves against stains for a long period of time - 30-45 days.
Preparing rust remover:
- Heat a bucket of water (10 l) on the stove.
- Grind 2 pieces of soap, 200 g each, on a coarse grater.
- Pour the resulting shavings into hot water.
- Stir the liquid until slightly dissolved.
Before spraying, soapy water is diluted. The procedure is carried out every 2-3 days.
Nettle infusion
An effective remedy for rust spots and other rose diseases. The main disadvantage is the long cooking time.
Preparation of the infusion:
- Collect 2 kg of fresh nettles.
- Chop shoots and leaves.
- Pour 7 liters of boiling water.
- Leave for 10-15 days, stir occasionally.
The liquid will be ready for use once it stops bubbling. The infusion is diluted in water 1 to 2 and the bush is sprayed.
Calendula decoction
The plant has disinfectant and antifungal properties. It is advisable to use it to treat roses from rusty spots on the leaves.
Cooking method:
- Boil 1 liter of water.
- Place 100 g of dried calendula flowers in a container with liquid.
- Cook for 5-7 minutes.
- Cool and strain the liquid.
The result is a concentrated decoction that must be diluted with water in equal proportions. To treat rust on rose leaves, spraying is carried out once every 7 days.
Prevention of the disease
The main way to prevent rust is timely and proper maintenance. Rose bushes need periodic watering, loosening and mulching of the soil.It is necessary to properly feed the bushes with fertilizers and do pruning on time. Leaves should be inspected regularly for small orange spots that indicate rust.
Planting disease-resistant varieties
To avoid having to treat your rose for spots on the leaves, you can plant plants that are resistant to fungal infections. There are many hybrid varieties that have excellent decorative qualities and are at the same time insensitive to rust.
These include:
- Nostalgie.
- Princess Alexandra.
- Aspirin Rose.
- William Shakespeare.
- Abraham Darby.
- New Dawn.
- Black Magic.
- Westerland.
- Chippendale.
- Angela.
These varieties of roses are the most resistant to fungi. With proper care, the likelihood of rust spots appearing on the leaves is eliminated.
Timely processing of plants
Flowers and shrubs located in the area next to roses should be subjected to preventive spraying. To do this, use a fungicidal agent or one of the proposed folk methods.
Spraying is carried out in the spring, after a sanitary haircut.
During the budding period, the bushes are not treated. During flowering, roses can be sprayed only if spots on the leaves or other signs of disease are detected.
Repeated preventive treatment should be carried out in the fall. For these purposes, Bordeaux mixture or copper sulfate are best suited. The bush and the soil around it are sprayed.
Prophylactic recipe:
Conclusion
Rust on rose leaves is a fungal disease that appears due to improper care and violation of growing conditions.To save the flower, it is extremely important to promptly identify spots that indicate damage. Subsequent treatment involves spraying the bushes with fungicides and using folk remedies. Competent and timely prevention can significantly reduce the risk of developing the disease.
