Control
Alternaria mali prevention consists of strict quarantine, never importing plants or scions from affected plants and collecting fallen or infected leaves and burning them in winter. Apple cultivars can be ranked in order of increasing resistance as follows: Indo, Red Gold, Raritan, Delicious, Fuji, Golden Delicious, Ralls, Toko, Tsugaru, Mutsu, Jonagold, Jonathan. Chemical control uses fungicides such as iprodione, mancozeb and captan. Disease severity is aggravated by severe mite infestation; thus good mite management is an important factor in preventing severe disease development.
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