How to prevent and control the large-scale leaf spot disease in roses
Comprehensive analysis of how to prevent and control the large-scale leaf spot disease in roses, let's follow the editor to take a look!
How to prevent and control the large-scale leaf spot disease in roses
In summer, roses are particularly prone to a problem, leaf spot disease. If not paid attention to, it will spread very quickly. Once it spreads, the whole pot of roses will show yellowing of their leaves. So, what should we do when large-scale yellowing occurs?
If not handled properly now, this pot of roses is very likely to die. Today, I will teach you how to deal with this kind of roses that have already been widely infested, mainly divided into two steps.
1. Severe pruning
Trim off all the branches on top of it, whether new or old buds, cut them all off. The significance of this is to cut off all the diseased leaves and directly cut it into a bare stem. In this way, this pot of roses can be completely cured. Now, it has been cut into a bare stem.
The pathogen of the leaf spot disease in roses is hidden in these leaves. After cutting off all the leaves, how can it spread? How can it invade this plant? So, when it has a disease, we must be ruthless. The more ruthless we are, the easier it is to treat.
2. Fungicide
After trimming all the leaves, we need to use the metalaxyl in the rose maintenance set to spray it once. Metalaxyl is a potent fungicide that can kill many bacteria, especially those that cause diseases in plants, which are highly sensitive to it.
We dilute it with water and spray it directly on the branches. Then, we also spray it on the potting soil because some bacteria may fall into the soil. After such treatment, the leaf spot disease of this rose can be completely eradicated.
The above introduction on how to prevent and control the large-scale leaf spot disease in roses is hoped to be helpful to you. Don't forget to check out more flower care experience and knowledge!