Managing root weevils on rhododendrons and other broadleaf evergreens
2017年10月17日 · Root weevils chew leaves of rhododendrons and other broadleaf evergreens. Find out how to prevent and limit damage from this common pest.
Root Weevils: Troublesome Rhododendron Pests
Weevils attack over 100 different plant species in addition to rhododendrons. They attack yews (Taxus), hemlock (Tsuga), strawberry (Fragaria), various vines and flowers and even potted houseplants. In the Pacific Northwest, weevils also feed on salal (Galtheria shallon) and huckleberry (Vaccinium).
Rhododendron: Root weevils - Washington State University
2023年4月4日 · Several species of weevils feed on rhododendrons. Characteristic damage includes notching of leaf edges by adults and minor to severe root and bark damage by larvae. Occasionally the larvae girdle the trunk at or just below the soil surface, killing the plant.
Control sneaky root weevils with beneficial nematodes
The teams that feed on rhododendrons — called black root weevils — are tiny compared to the helmeted players at each end of a football field, but the damage they do aggravates gardeners who can’t figure out a good defense.
Black vine weevil damage to rhododendrons - MSU Extension
2011年7月7日 · The black vine weevil, Otiorhynuchus saleatus, feeds on rhododendron plants throughout its life cycle. Weevil larvae, or grubs, live in the soil and feed on roots of the plant and as adult weevils they chew holes in the leaves of the plant.
Root Weevil Control on Rhododendrons - Extension Publications
Descriptions cover five root weevils that cause most damage on rhododendrons in the Pacific Northwest. Root weevil stages and damage shown in color. Chemical and cultural co ...
Obscure root weevil (Sciopithes obscures), black vine weevil (Otiorhynchus sulcatus), and woods weevil (Nemocestes incomptus) are the three most important of some dozen kinds of weevils attacking these plants.
Root Weevils: How to Identify and Remove Them From Your Garden
2024年5月29日 · An adult root weevil will lay its eggs in the soil under your favorite rhododendron in mid-summer. Those eggs will hatch into larvae in late summer to early fall where they will over-winter in the top layer of soil, feeding on the fine root mass of the plant.
Root weevils: troublesome pests • In Harmony Sustainable …
2020年10月22日 · Root weevils primarily chew on broadleaf evergreen shrubs. In particular, they seem to love rhododendrons, azaleas, pieris, viburnums and laurels. Because these plants take a while to lose their leaves, the notching will stay visible for many years. Adult weevils prefer to feed on young new growth. Root weevil larvae feed on roots and stems.
Root Weevil Control on Rhododendrons
Descriptions cover five root weevils that cause most damage on rhododendrons in the Pacific Northwest. Root weevil stages and damage shown in color. Chemical and cultural controls. Includes extensive list of species and hybrid rhododendrons resistant to adult root weevil feeding. 4 …
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