Avoid overhead irrigation. Water in a manner that keeps leaf surfaces dry at all times. Protect plants grown outdoors from splashing. Botrytis Blight Light brown spots form on lower petals. Browning spreads to other petals.
Infected tissues become covered with dusty gray spores.
Apply chlorothalonil, copper, fludioxonil, iprodione, mancozeb, or vinclozolin as a foliar spray. Chlorotic Mottle Leaves, at first mottled, become completely yellow. Chrysanthemum chlorotic mottle viroid Purchase virus-indexed plants that are free of the pathogen. Destroy infected plants and disinfest tools used to handle them. Do not handle healthy chrysanthemums after handling infected plants.