Root weevils chew predominantly on rhododendrons, azaleas, viburnums and laurels. Even though chewing damage to the leaves may be severe, the health of a plant usually is not affected unless the weevil larvae inflict heavy damage to the plant roots, something that rarely occurs outside of container-production nurseries. Because the weevils chew mostly on broadleaf evergreens, notching will be seen year after year, but this is mostly an aesthetic nuisance. Minor notching will not damage the plant's overall health. Proper watering and fertilizing are important parts of an effective weevil control program.
Studies show that most plants suffer heavy weevil damage because they already are under stress.
We handle the fertilizing for you, using quality organic products. In Western Washington, nearly a dozen types of weevils cause damage to broadleaf evergreens. The black vine weevil and the obscure root weevil are the most common species. Black vine weevils mature in late spring and feed into early summer. Obscure root weevils mature in late summer and feed into the fall.