Bacterial wilt causes rapid wilting and death of the plant. No chemical control is listed. Botrytis gray mold causes serious flower spotting in wet weather. Flowers appear to melt or fuse together. Applications of benomyl control this disease.
Powdery mildew coats the leaves with white powdery growth.
Benomyl may be used to control this problem. Visuals associated with this text. 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.