Aphids are tiny, oval pests with long legs and antennae. They live in colonies and normally appear in the spring and are attracted to the rose bush's young, tender growth, buds and undersides. You might notice mottled leaves, yellowing, curled leaves and wilting if your plant has been damaged by aphids.
To make your own garlic spray at home, mince three tablespoons of garlic and put in a cheesecloth. Knot the cheesecloth and steep the garlic in one gallon of water for about a week. Pour the liquid in a spray bottle and spray on the leaves. Don't forget to spray the undersides of the leaves and flowers.
There are other natural methods gardeners use to rid their rose bushes of aphids, including manually with fingers or with a cotton swab and alcohol. Others prefer to spray with a tea of either potato or tomato leaves or introducing its enemies, such as ladybugs.