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Powdery mildew (Sphaerotheca pannosa) is not normally a problem on apricots, but some fruit russeting has been observed in recent years. Primary inoculum is thought to originate primarily from nearby peaches and infected roses.
The following fungicides will provide control or suppression of powdery mildew on apricot.
Do not apply sulphur to apricots as it will cause defoliation.
Updated July 2018