When necessary, prevent root weevil movement into homes with barrier insecticide treatments along the outside foundation. Diazinon, Dursban and Orthene are some commonly available insecticides that may be used as barrier treatments. However, root weevils are difficult to kill with insecticides, so results are often unsatisfactory. Spray one to two weeks before the date when strawberry root weevils were first observed in previous years. If needed, repeat applications at four-week intervals.
Control also includes sealing openings and screening windows to prevent entry.
Root weevil populations can be reduced by removing plants around the outside of the home on which the Insects feed. Reducing watering around building foundations may limit root weevil migrations, as the adult Insects appear attracted to shade and moisture. Plant Injury Adult root weevil damage to plants, such as euonymous, can be severe. Treat as soon as leaf notching is observed. If needed, continue at three-week intervals through August.