black spot - Knowledgebase Question

Hicksville, Ne
Avatar for oohlala418
Question by oohlala418
June 13, 2009
My rose bush is 19 yr old.
It is a climbing bush.
the last 3 years it has been getting yellow leaves with black spots on them then thebush is almot bear. can you tell me why and how to take care of it. Could it be from surounding bushes.I really dont want to loose it
thank you

Answer from NGA
June 13, 2009
The symptoms of black spot begin with circular black spots, frequently with fringed margins. Yellowing and defoliation are common in susceptible cultivars. In wet weather, spots may become very severe and run together, making large irregular spots. Control practices include avoiding dense plantings (good air circulation all around the plant is important). Avoid overhead watering. Rake up and remove all leaves at the end of the season. You can try removing the yellowing leaves as soon as you notice them, but I suspect the canes might also be infected. A copper-based fungicide should stop the disease in its tracks. If you use a preventative spray in May and June, your rose should not develop black spot in July. Try putting your rose on a regularly scheduled spray schedule. Best wishes with your roses.

You must be signed in before you can post questions or answers. Click here to join!

« Return to the Garden Knowledgebase Homepage

Member Login:

( No account? Join now! )

Today's site banner is by RootedInDirt and is called "Pretty in Purple"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.