Rose Leaf Rolling Sawfly
During late spring/early summer rose leaflets can become tightly rolled in a downwards direction. These rolled leaflets often hang down compared to those unaffected leaves. In the following weeks the rolled leaflets are eaten by pale green caterpillars which are hidden within them. The leaf curling is a result of chemicals being injected into the leaf by the female sawfly prior to egg laying. Egg laying occurs in early summer.
Cultural methods: Light infestations can be controlled by picking off and disposing of rolled leaves as soon as they are seen.
Product Solution: Spray roses with a systemic insecticide from late spring with Provado Ultimate Bug Killer range of insecticides every 6-8 weeks.