How to treat the rose leaf blight?
This article provides an explanation on how to treat the rose leaf blight in the aspect of green plants and flowers. Next, the editor will introduce it to the netizens.
Sometimes, even when comparing with a book, it is still difficult to distinguish. So, let's introduce to you today on how to distinguish between the three very similar symptoms of leaf blight, fertilizer damage, and potassium deficiency.
Main characteristics and identification of rose leaf blight
Leaf blight is a common disease that occurs during the process of rose potted plants, mainly manifested in the leaves of roses. Initially, the leaves show yellow-green pinpoint spots, then the lesions gradually expand, becoming round or irregular, and later small black spots appear, and the edges of the diseased leaves show symptoms as if they were burned.
When the leaf blight develops to the later stage, the symptoms are very similar to fertilizer damage. To accurately distinguish, we need to understand the development process of the symptoms. Leaf blight requires time to develop from mild to severe. If the symptoms gradually appear and worsen over a week, and no fertilizer has been applied within a week, then it is highly probable that it is leaf blight.
Treatment methods for leaf blight
How to treat rose leaf blight?
When roses have leaf blight, we need to spray the whole plant with mancozeb in time for treatment. Many flower friends don't know how to apply the medicine and often pour it into the roots. However, in treating diseases, we usually adopt the method of foliar spraying, and fungicides are generally not poured into the roots unless there is a root rot situation, in which case a fungicide is poured into the roots.
Main characteristics and identification of rose fertilizer damage
As mentioned earlier on the Green Plant Enthusiast website, rose leaf blight and rose fertilizer damage show very similar symptoms, with yellowing and withering at the leaf tips and edges. However, it is very difficult for beginners to distinguish from the symptoms, so we need to judge based on the maintenance process.
Fertilizer damage usually occurs 3-5 days after fertilization and develops very quickly, with a large number of yellow leaves appearing in one or two days, and yellow leaves stopping developing after a week. If your roses have yellowing at the leaf edges and you have just applied fertilizer, then you should consider the possibility of fertilizer damage.
The yellowing of the leaves mentioned at the beginning of the article is actually caused by fertilizer damage. By observing the condition of the whole plant, the Green Plant Enthusiast website can also judge that this fertilizer damage has been around for a while and is not recent. Because all the yellow leaves are on the old leaves, while the new leaves do not have this phenomenon; on the contrary, the new leaves show a嫩 yellow state. This is actually caused by the damage to the roots due to fertilizer damage, resulting in poor nutrient absorption and manifested as iron deficiency yellow leaves in the new buds.