What medicine to use for the white mold on roses
Today's experience sharing: what medicine to use for the white mold on roses in the related experience of flower planting, let's follow the editor to take a look!
What medicine to use for the white mold on roses
What is the deal with the white mold on roses?
Many friends who keep potted roses indoors are prone to get a white powdery substance on the leaves, like sprinkled white flour. This is called powdery mildew.
Often accompanying powdery mildew, the affected leaves will also curl, and even if the plant is well cared for later, the affected parts will turn brown, affecting the photosynthesis of the leaves.
Powdery mildew on roses usually breaks out in spring and autumn, with spring being the most severe, starting from April or even the end of March, roses may continuously contract this disease.
When roses are infected with powdery mildew, the leaves will initially appear with white fluffy powder, and by the middle stage, the leaves will slightly curl until the white powder covers the entire leaf.
What causes powdery mildew?
Generally, indoor dryness, poor ventilation, and high temperatures are the main causes of powdery mildew. Spring is the high-incidence period of powdery mildew, and prevention should be emphasized during this time.
How harmful is powdery mildew?
Powdery mildew is a stubborn rose disease. Unlike rose pests such as aphids, it is difficult to completely eradicate with medication and requires long-term treatment and can recur multiple times. When roses are infected with powdery mildew, the leaves are the first to be affected, with the initial powdery infection only on some leaves and flower stems.
In the middle and late stages, the symptoms of powdery mildew will spread to the entire plant, eventually infecting all parts of the leaves, which will then lose their function and fall off. When the leaves fall off, the plant loses photosynthesis, which not only affects the growth of roses but also affects flowering. Moreover, when all the leaves fall off in large numbers, the plant's roots will also shrink, which places higher demands on water control. Eventually, root shrinkage may lead to overwatering and root rot.
How to prevent powdery mildew
The easiest and most convenient way to care for flowers is to prevent pest and fungal infections, which is much better than treating the plant after it gets sick.
If treated after getting sick, the leaves will already be twisted and damaged. Even if treated, they cannot recover, affecting the plant's aesthetics and reducing photosynthesis, absorption, and respiration.
When roses are growing new buds, it's essential to spray some preventive medication.
For example, commonly used fungicides like carbendazim and mancozeb have good preventive effects and are affordable.
Spraying once or twice a month at a ratio of 1:1000 can greatly prevent the occurrence of powdery mildew.
What to do if roses have powdery mildew?
Some friends say they haven't prevented it, but now they have a lot of powdery mildew. What should they do?
After getting powdery mildew, using carbendazim or mancozeb will not be effective. I recommend using Nideguan. This medicine is very effective against powdery mildew and can inhibit its occurrence.
If needed, you can search online. Of course, there are other effective medications like LunaSen and Lüwei, which also work well.
If you have these medications, you can spray them. Some rose enthusiasts also recommend neem oil. It is said to be effective, but I haven't tried it. If you have it, you can try it.
Rose powdery mildew is a fungal infection. Some friends have even used antifungal drugs like athlete's foot cream to treat powdery mildew with some effect. However, it must be diluted sufficiently before use.
After applying these antifungal medications, they can inhibit the development of fungi. However, these medications are for human use, and plants cannot absorb them into their bodies. They cannot continue to prevent, so they can only control the situation.
【Summary】
When growing roses or similar plants at home, before buying young plants, always check the base of the plant for white powdery substances, as they are prone to diseases and pests in greenhouses.
If brought home, they can infect other plants and cause unnecessary trouble. Moreover, when growing roses at home, it's best to choose varieties with good resistance to avoid being troubled by diseases and pests later on.
The above methods and introductions for treating white mold on roses are for reference only.