Do not treat blooms.
Resistance is a threat with iprodione, thiophanate-methyl, and vinclozolin.
Do not fog plants that are wet or under stress. Apply at 7-10 day intervals. Phyton 27 is for Botrytis and powdery mildew only. May be used on foliage of all varieties when not in bloom. For use of coppers, see the alphabetical entry Copper Fungicides.