Aphids suck plant juices and are controlled with applications of Diazinon dust or sprays of Sevin or rotenone
Rose chafer may feed on the flowers. These light tan beetles with red spindly legs are more of a problem where soils are sandy. Large numbers of insects are not controlled by pesticides. Spray with rotenone, Sevin, or methoxychlor.
Four-lined plant bug causes round, brown spots on the leaves. The spots are often mistaken for leaf spot diseases. No chemical control is listed.