Rose: Root weevils
Several species of weevils feed on roses. Adult weevils feed on the leaves, leaving small ragged notches along the edges. They may also feed on the flowers. They are wingless gray, brownish, or black beetles that feed at night. The larvae live in the soil and feed on the roots.
Use Integrated Pest Management (IPM) for successful plant problem management.
Select non-chemical management options as your first choice!
- Hand-pick night-feeding adults to reduce numbers.
- Application of beneficial nematodes which kill the larvae may be useful for controlling severe infestations. The nematodes are used as a soil drench in moist soils over 55 degrees F (mid-fall in western Washington).
IMPORTANT: Visit Home and Garden Fact Sheets for more information on using pesticides.
- Adult control should begin when adults emerge late May-June or when notching begins to occur on new leaves.
Listed below are examples of pesticides that are legal in Washington. Always read and follow all label directions.