Sulfur
Sulfur is very effective against powdery mildew of apples and cherries and scab on peaches and nectarines. Some varieties are easily injured by sulfur applications. Jonathan and Cortland are more tolerant than Stayman and Delicious. Rome Beauty is intermediate. Allow at least 7 days between oil and sulfur applications. Some of the newer sulfur formulations can be used in seasonal programs on apples without injury. Read the labels on these products for rates (see
Table 2.4).
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