How to Radically Cure Black Spot Disease in Roses
The editor introduces some small experiences with roses and Chinese roses, how to radically cure black spot disease in roses, which will be introduced by the editor next.
Some rose enthusiasts ask how to radically cure black spot disease in roses. This question is actually not easy to answer because black spot disease in roses easily occurs naturally in humid and stuffy environments. Therefore, even if it is cured at the time, there is no guarantee that black spots will not appear again, so preventing black spot disease is key. Prolonged dampness combined with high temperatures will cause the black spot disease pathogen to multiply rapidly and spread. Therefore, it is very prone to occur after heavy rain in the hot and rainy season, especially in summer and autumn.
Symptoms of Black Spot Disease in Roses:
Reddish-brown or blackish-brown spots are found on the front of the leaves, which gradually expand, and yellowing appears around them, usually on the older leaves, especially the parts close to the ground. In severe conditions, leaf yellowing and a large amount of leaf fall can lead to bare branches.
1. Spray Pesticides in Advance
The key point to prevent black spot disease is to prevent it from occurring during the rainy season, and immediately spray fungicides after rain, which will have a good preventive effect.
ps: During the rainy season when it rains for several consecutive days, some people think there is no opportunity to spray pesticides, but it does not rain from morning to night. When it stops raining for a short time, you can spray the pesticide. If it rains again after the pesticide is applied, it will also be effective. The idea of not spraying pesticides because of rainy weather will cause the black spot disease to spread gradually until the chance of rescue is lost.
2. Observe Daily
Once the spots are found, remove the diseased leaves in time and spray the medicine for treatment to prevent the spread. The earlier the disease is detected, the better the treatment effect will be!
3. Maintain Ventilation
Keep good ventilation, ensure proper planting density, and do not let the branches be too dense. In a well-ventilated environment, the plants will receive more sunlight, and the breeze will accelerate the evaporation of moisture on the leaf surface, making it less likely to have diseases and pests.
Recommended Drugs for Black Spot Disease Control
Amicarbixin
Amicarbixin has a wide range of uses and is effective against powdery mildew, downy mildew, rust, blight, black spot disease, and root and stem diseases in roses. It has both protective and therapeutic properties and is very suitable for prevention and treatment.
Nande Wei
Nande Wei is a very safe pesticide from the German company Bayer. It is effective against powdery mildew, black spot disease, rust, and spot leaf fall in roses. It has low toxicity and low residue, which can be used on green agricultural products, making it very suitable for home gardening.
Flusilazole
Flusilazole is an old medicine with many years of use history and is the most commonly used and very safe fungicide for treating and preventing powdery mildew and black spot disease. Its preventive effect on rose black spot disease is very ideal.
Haolike
Haolike is a fungicide from German company Bayer specifically designed for powdery mildew, black spot disease, and spot leaf fall, and it has very high systemic properties. Because of its systemic properties, it only needs to be sprayed on the leaf surface, saving time.
The above is some knowledge about how to radically cure black spot disease in roses (including symptoms and what medicine to use), and I hope this article can be of some help to you!