Things You'll Need
Instructions
Look for tiny insects. Mites are very small and usually measure around 1 mm.
Use a magnifying glass to get a better look. Mites have eight legs rather than six, but you will not be able to pick up on this trait unless you have a magnifying glass.
Determine how old the mites are using the magnifying glass. Young mites are greenish-white, while older mites are reddish-brown.
Watch for the weak and fine webs that mites spin.
Look out for black or pale spots (the mites) on your rose bush's leaves. A leaf that is infested with mites will develop yellow and brown spots. Then, the leaves will turn brown, curl up and fall off.
Pull a leaf off of the rose bush if you think you have an infestation of mites. Then tap the leaf on a white piece of paper. If you see small black dots that move, you probably have mites.