I have some roses that look like they are infected with Pseudoperonospora cubensis. I currently do not know how to treat this disease and would like a course of action. I have not applied any pesticides/fungicides as I do not know which one to use.

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    The disease you refer to targets cucumbers. Please show us pictures of what your Rose has so we can diagnose – kevinsky Apr 10 '16 at 23:59
  • Hi! Are you still having this problem? If so, as @kevinsky said, we need some pictures of your roses in order to help you. If you've solved it, would you take a few minutes to write an answer describing what you did? It would be a help to the community. I hope your roses are all better! – Sue Saddest Farewell TGO GL Dec 17 '16 at 21:28

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