I have used Serenade for years with great success.
Bayer now owns the rights to Serenade and they also sell Sonata which is similar but a different strain of fungicide.
I use both as a professional site said the diseases are like those in humans and can adapt so by switch strains of fungicide they will not get used to the same old, same old .
They are totally non-toxic, you can drink it but that is not recommended.
I drench the plants and soil in spring and fall, I have to cover my roses, and have found burying works best so to kill the disease in the soil is very important.
If you watch the plants and pick off the infected leaves, that will do more to eliminate the problem than even the best fungicide.
If you buy new roses treat them before you put them in the garden, I have had more problems with them spreading it than anything else.
I grow mostly hybrid Tea roses.
I also found that by putting a layer two to three inches deep of Coco mulch in the garden help in two ways; even in a heavy rain there is no splaching up onto the leaves from the ground and Coco mulch , I looked this up, has fertilizer effect of 2.5-1-3.
I used to have over three dozen roses but due to my mom passing on, they were her roses, and other concerns, I stopped replacing ones that died, either from winter kill or because I was moronically careless.
I lost two old roses that were not recommended for my area I put in due to stupidity on my part after they were eight years old.
That kind of took the spark out of me after mom was gone and I no longer had the main reason I cared for them.
I am down to a little over a dozen now but next year I may add a dozen, although winter prepping and uncovering in spring two beds verses three, was a LOT less work.
I did lose a few due to other "experts" saying do this, or this, or this rather than simply following my gut instinct I gained from watching mom.
Serenade and Sonata also work VERY well on vegetable vines, tomatoes and anything that gets leaf problems.
One year I used it to stop corn rust.
I buy the two and one half gallon jugs as it is FAR, FAR cheaper.
Peaceful Valley is the only place I know selling Sonata but just put Serenade, or Sonata, -- 2.5 gallon jugs for sale -- in your search engine and you should find some sources although for what ever reasons it is not as easy to find as it used to be.
