Gray Mold Botrytis sp. Avoid wet plant surfaces. Apply above materials at 10-14 day intervals.
Resistance is a threat.
Thiophanate-methyl as for powdery mildew will also control Botrytis and can be alternated with the above to reduce likelihood of resistance. For use of coppers, see the alphabetical entry Copper Fungicides. Do not fog plants that are wet or under stress. For use as a seed treatment, soil incorporation, soil drench, transplant or cutting dip, and foliar spray. Mycostop has activity against Fusarium, Alternaria, and Phomopsis , and in the greenhouse against Botrytis, Pythium, Phytophthora, and Rhizoctonia .