What is the reason why there is white ash on the leaves of Chinese rose?

There is white ash on the leaves of Chinese rose, which is caused by powdery mildew. At this time, there will be brown spots on the leaves, which will continue to expand and eventually produce hyphae, which will be distributed on the surface of the leaves and affect the growth of the plants. At this time, the leaves with white ash should be removed in time, and Bordeaux mixture should be sprayed on the rose to eliminate the germs.

Why is there white ash on the leaves of Chinese rose?

There is white ash on the leaves of Chinese rose, because plants suffer from powdery mildew, which causes the leaves to be infected by germs. In the early stage of powdery mildew, round spots will appear on the new shoots, buds and leaves of Chinese rose. With the passage of time, the round spots will gradually expand, and eventually hyphae will be distributed on the leaves, resulting in the yellow leaves of Chinese rose falling off.

What should I do if the rose is infected with powdery mildew?

After the rose suffers from powdery mildew, it should be pruned, and all the leaves with white ash should be cut off with sterilized sharp scissors, and then collected and burned together. Then, the rose should be placed in a ventilated place and sprayed with Bordeaux once a week. After a month in a row, the rose will return to health.

Control methods of rose powdery mildew

In order to avoid powdery mildew of Chinese rose, it is necessary to ventilate regularly during the cultivation period, keep the air circulating in the environment, strictly control the water consumption of Chinese rose, and water it once a week to avoid water accumulation in the soil. At the same time, it is necessary to provide sufficient sunshine for Chinese rose and improve the disease resistance of plants.