Besides picking up the leaves, how can I get rid of blackspot disease on roses?

I have many rose bushes in various areas of the yard, and keep picking up the leaves, but it isn't working. They bloom beautifully, then the leaves die off, and the blooms are gone until the next year.

Besides picking up the leaves, how can I get rid of blackspot disease on roses?
Having so many roses in your landscape to keep looking beautiful and blooming, calls for some professional action. You need to have a spray container, either a 1 or 2 gallon or a backpack sprayer to take care of this problem. Purchase a product called Ortho "multi-purpose fungicide". It comes in a concentrate, so will last you for many applications. You can get it at any leading garden center such as Walmart, Home Depot, and Lowes. This product contains the fungicide "Daconil" 2787, which is probably the best all around fungicide on the maket and has been for a number of years. It controls over 100 different diseases and funguses on trees and shrubs as well as turf. You can mix up a couple of gallons and spray all of the foliage, on top and the undersides too. This however, will not reverse the damage that has already occured on the leaves. The leaves that have spots will eventually die off and drop. This application will control the rest of the leaves not infected and any new growth that has budded out and beginning to grow. Follow the mixing directions for roses. Its very simple to do, and this product is easy to work with. You'll want to do the application early in the morning when there is no wind, and if the temperature is going to be hot that day, say, 82 degrees or above, you don't want to spray. Wait until the temp. drops below the 80 degree mark. The reason being, you may experience some burning of the leaves. This applies to all fungicides however and not just this one. You should repeat this spraying again, 7 to 14 days later for best control. Iam providing a link for you to look at regarding this wonderful product. I have used it myself for over 20yrs, on fruit trees, ornamentals, flowering shrubs, turf, and veggies. Hope this answers your question and good luck.

http://www.epinions.com/content_10598977...

http://yardgeek.com/fungicides_view_prod...



...Billy Ray
Reply:This is a fungal disease that is very common in hybrid tea roses. You could consider changing them to heirloom roses instead, since they are very resistant to black spot.



Otherwise, keeping the leaves picked up is important, as is changing the mulch every season. In addition, you can work cornmeal into the soil around the plants and also spray the leaves regularly with a 10 to 1 solution of water to milk. It is a constant battle though.
Reply:My grandmother used to have several rose bushes and a few climbing roses. One thing she did was have my grandfather dig a hole beside the bush (usually before they planted the rose bush itself) and lay in some ceramic tile to lead the water down to the roots so the leaves didn't get wet. She would stick the hose in the hole and let it run on low for a while to make sure the water could soak into the ground at a slow rate.



It's possible, if you are just wetting the ground on top, that the roses aren't getting enough water to the roots which can cause the leaves to turn and die out.



The other thing she did to prevent the black spots was once a month, she would lightly spray or mist the bottom of the leaves, then she used the rose dust on them. She had the kind of container that blew the dust up like a powder under the leaves so it would stick to the wet area. That is where many aphids and other bugs will feed if they get the chance and that will turn the leaves black and kill out the roses.



You might also have a "male" plant which will bloom once and that's it. I had a beautiful rose bush that my grandfather planted for me one time and it got these huge pale yellow w/pink roses but once those were gone, it was just a green vine. The nursery said it was a male plant and they are known to have fewer blooms. It died the next winter so we took it out and I gave up on roses for a while.
Reply:use any dishwashing liquid in a spray bottle--1/3 dishwashing liquid soap and 2/3 water--spray on leaves once a week
Reply:ok first of all you need to prune the roses which you do any time of year cutting about 3 leaflets down at a 45 degree angle at an outward facing bud. Cut them once the blooms are faded. With black spot it is important that you cut the infected parts of you can do that right now also! Then spray the roses and the soil around them with Ortho insect and disease control avail at any home impr. store .The roses will drop all the diseased leaves so they will be bare for a little while.If they become to "leggy" cut them way down and they will bush out again.

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