Why is the black spot and powdery mildew on Chinese roses increasing
Today's sharing: the topic of why the black spot and powdery mildew on Chinese roses are increasing, followed by detailed content sharing.
Why is the black spot and powdery mildew on Chinese roses increasing
With the high temperatures of summer, diseases such as black spot and powdery mildew on Chinese roses are becoming rampant. Many gardening enthusiasts find that after their roses are infected with black spot and powdery mildew, they clear these diseased leaves and immediately spray fungicides, but there is no significant effect.
Why do many diseased leaves continue to grow later? In fact, this is because many gardening enthusiasts are using the wrong medication. Many people may choose to use carbendazim or mancozeb, which are protective fungicides, when applying fungicides.
These fungicides can only be used for routine prevention and can only kill surface pathogens on the plants. They do not have systemic properties and cannot kill the pathogens inside the plants, so they do not have fungicidal effects. Since the pathogens inside the plants are not killed, naturally, these diseased leaves will continue to grow.
So, what kind of medication should be used to effectively control the pathogens causing black spot and powdery mildew? Actually, the fungicide I commonly use is benalaxazole, which contains two fungicidal components, providing broad-spectrum and high-efficiency fungicidal effects. It also has strong systemic and penetrative abilities, allowing it to directly penetrate the plant and kill the pathogens inside, thus controlling the disease.
The usage method is simple. It consists entirely of small capsules. We take one small capsule, dilute it with about 500 milliliters of water, and apply it precisely. Then, spray the roses every 5-7 days, continuously applying 2-3 times to effectively control the disease. This makes it less likely to be re-infected with black spot and powdery mildew, so using the right medication is crucial.
This concludes the full content shared on why the black spot and powdery mildew on Chinese roses are increasing. I hope it helps you and also encourages everyone to come and see more green plant and flower experience and common sense!