Identifying and Controlling Rose Sawfly Larvae

Green worms and tiny white larvae devouring buds and new growth on a Sunsprite rose are likely rose sawfly larvae. These pests can strip a plant in days and show a preference for certain varieties. They are resistant to many common insecticides, including combination products like Bayer 3-in-1.

The most effective treatment is Safer Insecticidal Soap, which penetrates their soft bodies better than other sprays. Apply thoroughly to the undersides of leaves where larvae feed. Repeat as needed, and monitor nearby roses for early signs of infestation.