These are light brown, very slender bugs. Squeeze an open bloom and watch inside the petals for movement. They are definitely spread by the wind. Follow the instructions on the label for mixing, etc. These bugs are microscopic in size, but you should still be able to see them withthe naked eye.
Hot weather is prime time for spider mites.
Spray your plants with Neem Oil before problems arise. Insecticidal sprays, soaps, and miticides will work. Always apply to the underside of the leaves. This is where the mites hang out. You r rose leaves have been eaten.