What should I do if rose gets powdery mildew?

The source of powdery mildew is in the soil, and the pH of the soil is acidic. Rose is prone to powdery mildew and black spot disease due to high temperature, humidity and lack of ventilation.

If it is a potted rose, it is suggested to change the soil in the pot, and then carefully use 50% Tobezin solution and agricultural dimethoate according to the instructions, and spray the plants alternately every week.

If planted in the ground, it is suggested to use plant ash or garden lime to improve the soil, and then spray Tobuzin and dimethoate.

If powdery mildew is very serious, it is recommended to cut off all the leaves and buds, and then spray the above pesticides cross-wise, so that roses can grow new leaves.