Looks like chilli thrips to me. You'll have to remove and bag (don't compost!) all of the damages areas and hope that contains the problem. I'm no expert, but the only chemical that I know of that works is spinosad. You could try spraying Monterey Garden Insect Spray for something cheap (and low on chemicals). It seemed to give some short term relief in my garden.

dear SoFL Rose,

i have the same problem just on a much larger scale. it has devastated my entire garden. i have ordered Diatomaceous earth, seems to be the best non-poisonous solution. How is the situation developing on your end?

Sylvie, how are you applying the diatomaceous earth?

it will be delivered the day after and i plan to mix it with water and spray

Thanks for the info, Sylvie. I looked it up, because I have chilli thrips in my garden and really need to use something.

Several sources said to use food grade diatomaceous earth for lung safety, although wearing a mask might still be a good idea. The DE must be used dry to work. Here is one article that explains why: richsoil.com/diatomaceous-earth. There are some inexpensive powder sprayers/dusters especially for applying diatomaceous earth.

Chilli Thrips are tough. How does diatomaceous earth control them once theyre active on the plants? The Thrips lay eggs into the rose tissue. I am using spinosad and horticultural oil. Growers add systemics but these nerve toxins kill bees so I don't use those. If DE is working, I will use that too. You have to control these fast.

yes, i am too late, i thought it is virus or fungus. if DE does not work i will use spinosad. in how many days would one see improvement on roses if a given method works?

DE might work on chilli thrips. I found at least one source that recommends it as a last resort: almanac.com. You might want to try a combination of methods. I'm hesitant on trying DE since it will also harm beneficial insects such as ladybugs/beetles.

Here is a well written article on Chili Thrips

http://www.lsuagcenter.com/profiles/lbenedict/articles/page1469030428468

It lists Avid and Spinosad as two of the treatment (those seem to be the only ones I recognize, along with nasty Orthene).

I wonder why I don't have Chili Thrips? (not that I want them!). I seem to have every other form of disease and pestilence!

Sylvie, thank you for that recipe. I can't try it now, because the weather reached 100 degrees Fahrenheit yesterday. But I will try to remember it for next year in the cooler months.

Dusters are inexpensive if you want to try the DE. You can get them online or at your local hardware/ box store.