Leaf Rolling Sawfly
The devastation caused after a sawfly has laid her eggs on the leaves of roses can be visually alarming in a bad attack.
The parent actually injects the leaf with a chemical secretion that causes it to curl and protect the eggs. When the grubs hatch they will feed on the leaves rendering them totally useless to the plant. This is a very difficult situation to overcome because the grubs are protected by the furled leaves and will not be reached in the process of spraying. The best control is to remove the leaves and burn them. The long-term health of the plant will not be badly affected but in the immediate year it may be slightly more prone to disease than usual.
