The Q&A Archives: yellow and brown spots also mold

Question: I have rose bushes that the leaves start having black spots on green leaves and turns into yellow and brown spots, finally the leaves die and fall off. What could I do to solve this problem? I also read about mold or mildrew on roses but what can I use now to stop it from spreading?

Answer: Black spot is one of the most common diseases of roses. Fungicides will help control it, but you'll need to practice good garden sanitation (prune and remove the most obviously infected canes), and try to keep water off the leaves (hard to do during the rainy season!). Fungicides need to be applied every 7-14 days during the growing season. Some choices include Funginex, Daconil, Captan, Bravo. You'll find others in the garden section of your local Home Depot. I'm afraid black spot is just one of the challenges you'll face when growing roses, but the reward is worth the effort. I don't think there's anything quite as lovely as a garden filled with roses! Best wishes with your roses.

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