What to do if there is a layer of white frost on the leaves of the rose
If you want to know the content of green plant flower planting about what to do if there is a layer of white frost on the leaves of the rose, the editor below will provide you with detailed answers
What to do if there is a layer of white frost on the leaves of the rose
The white frost on the leaves of the rose may indicate that the plant has powdery mildew, which is mainly caused by unsuitable environment and improper care. In the early stage of the disease, it is necessary to cut off the diseased leaves of the plant and burn them in a centralized manner, and spray fungicides on the plant. If the condition of the plant is severe, it is necessary to spray chemicals such as thiophanate-methyl and lime sulfur mixture for treatment.
The plant is prone to powdery mildew if it is kept in a dark, stuffy, and humid environment for a long time. Powdery mildew often occurs on the back of old leaves and branches, initially appearing as round white powdery spots, which later expand and result in yellow granules on the leaves.
If the rose has powdery mildew in the later stage, there will be small brown or black spots on the leaves, which can cause the leaves to die and fall off in large numbers. After the leaves of the rose have white frost, it is necessary to cut off the diseased leaves and burn them in a centralized manner to cut off the source of infection. Fungicides such as thiophanate-methyl, lime sulfur mixture, benomyl, and methyl thiophanate can be used for treatment.
After diluting the fungicide with water, the plant can be sprayed once every 7-10 days, and continuous spraying for 3-4 times can eliminate the disease. Different fungicides can be used alternately for better treatment effect. After spraying, the plant should be placed in a cool and well-ventilated environment for care. Once the rose has recovered, it can be sprayed with a carbendazim solution once every 15-20 days to prevent the plant from getting sick again.
During the care period, the rose should be placed in a warm indoor environment, with windows often opened for ventilation to maintain indoor air circulation. During the plant's growth period, in order to make the rose grow better, it is necessary to water and fertilize moderately, avoiding too high fertilizer concentration and trying to apply light fertilizers. During the care period, it is necessary to avoid direct sunlight and prevent the plant from getting wet in the rain.
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