Treating Black Spots on Rose Bushes

One of the common ailments for rose bushes is black spot on the leaves. This is a guide about treating black spots on rose bushes.
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May 18, 2005 Flag

If you have rose bushes, fungal diseases such as black spot and mildew can be prevented, but not cured. Spray a fungicide every 7 to 10 days as a preventative measure.

By Terri H.

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May 23, 2011 Flag

I have noticed black spot on some of my roses. What do you suggest?
Thanks.

By maeref

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May 31, 20110 found this helpful
Best Answer

Try 1 cup of cornmeal to 1 quart of water. Set for one hour and spray roses.

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June 9, 20110 found this helpful
Best Answer

In rose care the best thing is a systemic feed that also has properties against black spot. After care, the best thing is a commercially produced and carefully applied fungicide labelled specifically for black spot.

Once you get rid of the black spot, be careful to avoid reintroducing conditions favourable to its development-don't water close to or after dark; keep the center of the plant open with proper pruning; space new bushes proper distances apart; and disinfect your pruning tools between cuts, not just plants.

Feed with one of the systemics to keep a beautiful and healthy plant.

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May 20, 2011 Flag

What can be done about roses that have extreme black leaf?

By Paula H.

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May 20, 20110 found this helpful

In the old days, they would tell you " throw your dirty dish water on it". Now a days very few people wash dishes by hand. So put a little dish soap in your watering can, suds it up and pour it over your rose bush. I would remove the bad leafs. I have alot of rose bushes and it works for me. Do not use eletric dishwashing detegent!

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May 31, 20110 found this helpful

I was having problems growing roses, so I went to a class. the most important thing I learned was to make sure I never water the leaves. Since I started only hand watering the rose bushes from the bottom, they are doing great! I also keep lots of composted soil around them, covered with mulch and then I do not even need to fertilize them at all.

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June 11, 2012 Flag

Where can I buy on line Captan for black spot on my rambler rose?
Please and thank you.

By Alice

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June 4, 2012 Flag

I have black spot on my ramble rose and all the leaves are slowly dropping. Is soapy water any good if I spray it with that or do I have to get Captan to clear it?

By Alice

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