You can usually achieve control of root weevil populations by using Sevin products. Euonymus, Heuchera, Astilbe, hosta, creeping jenny, peony and wisteria are among the common hosts of black vine weevil. The black vine weevil is the largest of these at 11-13 mm. The damage caused is small notches along the leaf margin. Root weevils are not soft-bodied insects so are not as sensitive to insecticidal soap that is very effective against pests like aphids. Root Weevils: Troublesome Rhododendron Pests. weevil, lilac root weevil and black vine weevil. It is by Whitney Cranshaw at Colorado State University. That may be true but I cant grow petunias, roses or other soft petaled flower there as the root weevils decimate them by mid summer. Starting around late-winter through early-spring the grubs pupate in the soil before emerging as adults mid- to late-spring. If any information in these recommendations disagrees . They can cause significant damages to different plants, regardless if they are in their adult or larval stage. Root weevils, like the lilac root weevil or strawberry root weevil, overwinter as larvae in the ground. Ask an Expert is made up of groups and individual experts. The lilac root borer is slightly smaller (about 9 mm), and the strawberry root weevil is the smallest of the three at about 5-6 mm. lilac root weevil (O. meridionalis) strawberry weevil (O. ovatus) and rough strawberry root weevil (O. rugosostriatus) are a complex of non-native, snout-nosed beetles (Coleoptera: Curculionidae) that cause damage to ornamentals and small fruit crops in Utah. This leaf-edge notching is the handiwork of root weevils, probably the lilac root weevil. Since lilac root systems are shallow, they can only reach the base of shallow foundations. Root weevil notching damage on lilac. They told me it is a cosmetic problem only, no need for control. Leaf cutter bees are beneficial and use the material they cut out of the leaf to make nests. It is by Whitney Cranshaw at Colorado State University. Life cycle: Larvae overwinter in the soil near plant roots (so they can feed on them), pupate in the soil and emerge as adult beetles in early summer. It is by Whitney Cranshaw at Colorado State University. The leafcutter bee cuttings are usually more circular and larger. It has characteristic patches of yellow hairs on the wing covers. It is by Whitney Cranshaw at Colorado State University. Do not confuse the strawberry weevil with the strawberry root weevil… obscure root weevil lays eggs on the foliage, then curls and cements the leaf over the eggs. I simply tolerate the damage and tell people I have the lacy leaf variety of lilac. Spinosad is listed as an effective control and is relatively safe (I actually give it to my dog for flea control.) The safest control involves placing sheets or plastic beneath the plants, shaking the weevils off the plants at night, and disposing of them. may reach 1/2 inch. ... Insects Black Vine Weevil Control: Getting Rid Of Black Vine Weevils. Signs of their activity: Notched edges of leaves. Strawberry root weevil also has a very wide host range that includes strawberry, raspberry, rhubarb, white clover, dandelion, It is by Whitney Cranshaw at Colorado State University. Typically seen on: Peonies, strawberries, rhododendron, yew. They have one generation in a year. native to the Mediterranean, adventive in NA and widespread in w. Lilac root weevil is most often found feeding on lilac, privet, peony and euonymus. Some of the most common types we see in the Inland Northwest include the black vine weevil, strawberry root weevil and obscure root weevil, and the lilac or privet weevil. Identifying Root Weevils. Shrubs commonly attacked are euonymus, privet, laurel, ivy, and lilac, along with many others. About This Subject; View Images Details; View Images; Invasive Listing Sources. The black vine weevil is the largest of these at 11-13 mm. Image 5499247 is of lilac root weevil (Otiorhynchus meridionalis ) damage on lilac. Life cycle: Larvae overwinter in the soil near plant roots (so they can feed on them), pupate in the soil and emerge as adult beetles in early summer. Strawberry root weevils are shiny, brownish-black and about 1/4 inch long. Adults emerge in the late spring to feed on foliage and lay eggs at the base of plants throughout the season. Range . Largest is the black vine weevil, which may reach 1/2 inch. Look for regular U-shaped notches along the leaf edges. Identifying and controlling root weevil in your garden and houseplants can keep your plants from suffering unnecessary damage. Controls: For the most part, the damage caused by weevils is more aesthetic. They are typically active at night and hide in the soil or beneath plants during the day, which makes them tricky to spot. Strawberry root weevil. In hot, dry weather, the adult beetles will sometimes move into houses. EOL has data for 3 attributes , including: geographic distribution includes Image 1455074 is of lilac root weevil (Otiorhynchus meridionalis ) damage. Lilac root wevils are shiny, brownish-black beetles, about 0.25 inches (0.6 cm) wit long snout (rostrum) and elbowed antennae. Hank Helm Bainbridge Island, Washington. They can cause extensive damage to host plants. Lilac root weevil on peony. The strawberry root weevil is shiny and brown-ish-black. Photo by W. Cranshaw, Bugwood.org . Follow application directions and safety precautions to “ lilac or privet weevil 2 weeks after.! Make nests problem only, no need for control. the body of the host rose bush is a real! 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