Why Does the Rose Peeling?
Today, I will elaborate on the gardening knowledge of why roses peel for netizens, and share the detailed content next.
Why Does the Rose Peeling?
Rose peeling may be a normal physiological phenomenon. The cork cambium cells age programmatically and stop growing, while the inner cells continue to grow, causing the outer tissue to peel off due to tension and pulling forces. It could also be due to black spot disease, in which case, it is necessary to control the watering amount to prevent the spread of rainwater and the recurrence of the fungus, and use carbendazim for thorough elimination.
1. Normal Phenomenon
Sometimes, rose peeling is a normal physiological phenomenon. The fallen layer is the cork cambium, which ages programmatically and stops growing, while the inner phloem and xylem continue to grow. The outer tissue peels off due to tension and pulling forces, waiting for new cells to differentiate into tissue.
2. Black Spot Disease
The symptoms of black spot disease in plants are initially black spots of varying sizes on the leaves, with radial brown mycelial lines under the cuticle of the lesion. Later, the spots expand and turn yellowish-brown or dark purple, eventually becoming grayish-brown. In severe cases, it can cause the new shoots to peel and die, and all the leaves at the bottom of the plant to fall off.
3. Disease Patterns
Black spot fungus usually overwinters in the form of mycelium or conidial plates on the host plant and can be spread by rain or insects. In warm and rainy spring and summer, the fungus can spread widely. Once the spores land on moist leaf surfaces, they can germinate within eight hours, forming new mycelium that penetrates the cuticle cell tissue of the host plant.
4. Control Methods
In winter, it is necessary to promptly clear away withered branches and leaves, cut off diseased branches thoroughly, burn them collectively, and spray lime sulfur. In regular maintenance, applying more phosphorus and potassium fertilizers can enhance the plant's resistance to diseases. During the outbreak, control the amount of watering to avoid wetting the leaves. You can spray a 50% carbendazim wettable powder solution at a concentration of 1,000 times at the beginning of the outbreak.
The methods introduced for why roses peel, as shared above, are for reference and suggestion.