Young leaves, young twigs, and flower buds are covered with a thin layer of grayish white powdery material. Infected leaves may be distorted and curled, and many may turn yellow or purplish and drop off. New growth is often stunted, and young canes may be killed. Badly infected flower buds do not open properly. In late summer, tiny black dots spore-producing bodies) may be scattered over the powdery covering like ground pepper.
Apply a fungicide labeled for this disease, following label directions. Rake up and destroy leaves in the fall.
©2002-2012 The Scotts Company LLC, all rights reserved.
® and ™ denote trademarks owned by or licensed to The Scotts Company LLC, its affiliates, or partners.
The Global Professional business group and its subsidiaries of The Scotts Company LLC were purchased by ICL in February 2011. This is the USA consumer products site forThe Scotts Company LLC. For information about ICL or Scotts® Professional products, please visit http://www.scottsprofessional.com.