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Powdery Mildew of Rose
This article was published originally on 7/14/1995Powdery mildew is a widespread disease of roses. The disease is easily recognized by the white powdery appearance of infected leaves, twigs, and flower buds. Infected leaves may also appear distorted and fall from the plant.
Powdery mildew is favored when rainfall is low or absent, temperatures are between 70 and 80, nighttime relative humidity is high, and daytime relative humidity is low. Mildew spores can spread easily by wind to nearby healthy plants.
To control powdery mildew:
Year of Publication:
IC-470(18) -- July 14, 1995