The disease worse on overwatered plants. There is no control.
Powdery mildew causes a white powdery growth on leaves and blossoms.
This problem is worse when plants are subjected to poor air circulation. Bud drop be due to low temperatures, low humidity, overwatering and extreme fluctuations in soil moisture, temperature or light intensity. This information is for educational purposes only. References to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. This information becomes public property upon publication and may be printed verbatim with credit to MSU Extension.