Pick off and destroy affected leaves. Use Latox or Rose Dust to kill the adult flies. Leaves are chewed or have holes. Leaves are rolled. White powder covers the leaves and stems.
Plant growth is stunted.
Improve air circulation. Use Benomyl , Folpet , Garden Sulphur or Rose Dust . Yellow dots and green mottling on upper surfaces of the leaves and rusty red pustules underneath. Improve air circulation. They turn brown, red, yellow or gray, curl up and drop off.