Each owner of a summer cottage rejoices when beautiful flowers bloom on his flower beds and rose gardens. But flowering shrubs can be overshadowed if black spots appear on the leaves of the rose. This condition is a symptom of a fungal disease that usually occurs in late spring and summer.
Most often from a disease that reduces the decorative beauty of flowering bushes and often serves the reason for stopping flowering is affected by roses planted in lowlands or a flower garden with a large amount plants.
Please put your likes and subscribe to the channel "About Fasenda". This will allow us to publish more interesting garden articles.
Symptoms and remedies for disease control
When fungus begins to develop on the leaves of the plant, symptoms appear after a month, but in warm and humid summers, dark spots become noticeable after a couple of weeks. At first, the leaves and shoots of the lower part of the bush are covered with brown spots with a yellow border, then the entire bush to the very top.
The further development of the disease is characterized by the appearance of the following symptoms:
- Increasing the spots in size and coloring them black.
- The leaves on the bushes begin to turn yellow, curl and even fall off.
- Shoot growth slows down, flowering stops.
You can cope with black spot by pruning affected shoots, treating roses with antifungal agents and using preventive measures to curb the development of the fungus. Folk remedies for the treatment of rose bushes have proven themselves well in the early stages of the disease. If spraying is not carried out on time, you will have to resort to the help of fungicides.
Bordeaux liquid belongs to super-means for combating the disease. To obtain a 1% solution required for spraying, take 0.1 kg of copper sulfate, 0.2 kg of lime and 10 liters of water. In one container, copper sulfate is diluted with hot water, in another, lime is dissolved in a cold liquid. Add cold water to each container until the same volume is obtained and mix the liquids. Roses are processed 2-3 times every week.
Colloidal sulfur is also used, for this you should dilute 30 g of sulfur in 10 liters of water and spray the bushes. Solutions from various weeds, with which all summer residents are fighting, have proven themselves well. You should take 1 kg of horsetail leaves, pour a bucket of water, leave for a day, then boil, strain, dilute with water in a ratio of 1:10 and spray the bushes.
You can take nettle leaves, pour boiling water, strain after two days and apply for processing every 10 days. Dandelion infusion has proven itself well, which can be used not only for spraying, but also for watering roses in order to destroy fungi in the soil.
If the site is so thoroughly treated that there are no weeds there, use an infusion of onion husks with the addition of soap or dust the bushes with wood ash. Preventive treatments and ensuring the flowers are in the right conditions will help prevent black spots.
Have you had to deal with black spot on rose leaves?
Original articleand many other materials, you can find on ourwebsite.
Read about caring for roses in the following article:How to care for roses in summer: sharing secrets