Severe attacks may destroy entire shoots. Mild attacks may decrease flower production. Epidermal cells dry then the epidermis breaks open and curls. Increase light exposure and decrease humidity. Glassiness symptoms are dark green translucent spots.
Slight pressure crushes the epidermis then the tissue beneath rapidly turns black.
The shoots above the infection may be killed. Mild attacks cause corky layers or spots. Increase light exposure and decrease humidity. 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.