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Q.How Do I Treat Rose Plant Pest?

Zone 95112 | Marybla added on May 6, 2020 | Answered

stems and base of long stem rose plants have thick, white material covering many of stems and base of roses, and leaves of same rose plant and another 3 rose plants have crinkled and yellow/brown discoloration on leaves. I do not see actual insects, like aphids on the plants. Please help. thank you very much.

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Answered on May 8, 2020

It sounds like you have a Powdery Mildew problem and perhaps another mildew problem. I recommend spraying them with a fungicide labeled to get rid or Powdery Mildew and other fungus. I use a fungicide called Green Cure mixed and applied at the Cure Rate. You can also get a fungicide called Mil-Stop that is the same as green cure, both on Amazon.com or at this site: http://www.biconet.com/disease/greenCure.html Spray the rosebushes with this spray every 5 to 7 days for 4 to 5 spray times. Then can go to 14 to 17 days.

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