Rhododendron: Aphids categories: Ornamentals Rhododendron Rhododendron Insects Shrubs revision date: 2023-04-04 12:00 Aphid damage on rhododendronPhoto by: A.L. Antonelli Biology Aphids cause twisting, curling, or puckering of new growth by their feeding. Whitish cast skins and green live aphids may be visible on the undersides of leaves. Honeydew, a shiny, sticky substance excreted by aphids, […]
Rhododendron: Azalea bark scale categories: Ornamentals Rhododendron Rhododendron Insects Shrubs revision date: 2023-04-04 12:00 Azalea bark scale and sooty moldPhoto by: A.L. Antonelli Biology The azalea bark scale is a soft scale resembling mealybugs. Red females cover themselves and their eggs with a white, waxy protective coating. Cottony masses of the scales are often located […]
Rhododendron: Caterpillars categories: Ornamentals Rhododendron Rhododendron Insects Shrubs revision date: 2023-04-12 12:00 Looper crawling on edge of rhododendron leafPhoto by: S.J. Collman Biology Several caterpillar pests occur on rhododendrons, most notably cutworms, loopers, and the obliquebanded leafroller. Cutworms and loopers (various species) feed on leaf tissue, removing large, irregularly-shaped pieces. They are night-feeders and may […]
Rhododendron: Lecanium scale categories: Ornamentals Rhododendron Rhododendron Insects Shrubs revision date: 2023-02-09 12:00 Lecanium scales on twigPhoto by: R.S. Byther Biology Lecanium scale adults are found on the twigs in late spring. At this stage they are usually brown or mottled brown and white bumps on the stems. During the summer and fall, scale nymphs […]
Rhododendron: Rhododendron lace bug categories: Ornamentals Rhododendron Rhododendron Insects Shrubs revision date: 2023-04-04 12:00 Rhododendron lacebug symptoms on leavesPhoto by: C.R. Foss Biology The rhododendron lace bug causes stippling on the upper surface of the leaves, and deposits crusty or tar-like excrement on the lower surface. Adult insects are whitish-tan and approximately 1/8″ long with […]
Rhododendron: Rhododendron whitefly categories: Ornamentals Rhododendron Rhododendron Insects Shrubs revision date: 2023-04-04 12:00 Rhododendron whitefly damagePhoto by: A.L. Antonelli Biology Whiteflies are small white insects that hold their wings rooflike over their abdomens rather than flat like true flies. Infested leaves, usually the tender young leaves at the branch tips, are mottled yellow on the […]
Rhododendron: Root weevils categories: Ornamentals Rhododendron Rhododendron Insects Shrubs revision date: 2023-04-04 12:00 Root weevil damage on rhododendron leavesPhoto by: A.L. Antonelli Biology 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 […]