Reasons for the occurrence of rose soot disease
Today, I will introduce to you the symptoms of rose soot disease and related introductions about green plants and flowers. Next, the editor will provide you with detailed answers.
Rose soot disease is a frequently occurring disease in roses. It is really helpless for rose beginners. Don't worry, today's article will focus on the prevention and treatment methods for rose soot disease.
In the early stage of rose soot disease, small brown soot spots appear on the leaves, which gradually expand and merge into large areas, covering the leaf surface and young shoots. Some mold layers are thick and black, flaky and easy to peel off. Sooty mold seriously affects the plant's photosynthesis, causing poor growth, fewer flowers, and severely affecting the ornamental value of roses.
Two, reasons for rose soot disease infection
Sooty mold is prone to occur in high temperature, high humidity, and poor ventilation environments, caused by fungi such as Fumago, FumagovagaPers, and Cladoorium. The pathogen overwinters in the affected area and diseased leaves, and its spores can be spread by air or insects. Severe infestations of aphids, scale insects, and whiteflies often accompany the occurrence of soot disease.
Three, prevention and treatment methods for rose soot disease:
1. During the rose growing season, especially in spring, insecticides can be sprayed to control aphids, scale insects, etc. Commonly used drugs include 40% omethoate emulsion 1000 times liquid, or 50% trithion emulsion 1500 times liquid.
2. Plant with appropriate density to facilitate ventilation and light; prune the plants moderately in a timely manner.
3. Spray 500-800 times of 45% dimethomorph water agent or 400 times of sterilizing agent during the disease period.
The above-sharing content about the symptoms of rose soot disease, the reasons for rose soot disease infection, and the prevention and treatment methods of rose soot disease: hope it is helpful to you!