Willow: Carpenterworm Categories: Ornamental trees Ornamentals Willow Willow Insects Last review date: 2025-06-28 08:34 Last edit date: Carpenterworm larval mine Photo by: Unknown Biology Carpenterworms are the larvae of a mottled gray and black moth. The caterpillars are white or pinkish red with a dark head and 1″ to 3″ long when mature. They bore […]
Willow: Poplar and willow borer Categories: Ornamental trees Ornamentals Willow Willow Insects Last review date: 2025-06-28 08:41 Last edit date: Poplar-and-willow borer adult Biology The adult poplar-and-willow borer is a black and white weevil (a flightless beetle) about 3/8″ long. The larvae are white and legless and mine beneath the bark and in trunk and […]
Willow: Satin moth Categories: Ornamental trees Ornamentals Willow Willow Insects Last review date: 2025-06-28 08:44 Last edit date: Satin moth Photo by: A.L. Antonelli Biology The caterpillars of the satin moth feed on leaves of willows and poplars. They may also occasionally attack oak and aspen. The adult moth is satiny and pure white, with […]
Willow: Spiny elm caterpillar Categories: Ornamental trees Ornamentals Willow Willow Insects Last review date: 2025-06-28 08:47 Last edit date: Spiny elm caterpillar Photo by: S.J. Collman Biology The spiny elm caterpillar is the larval stage of the mourningcloak butterfly. The adult is approximately 2 1/2″ across, with purplish brown to blackish wings bordered by a […]
Willow: Bacterial twig blight Categories: Ornamental trees Ornamentals Willow Willow Diseases Last review date: 2026-08-28 02:29 Last edit date: Willow bacterial twig blight Photo by: R.S. Byther Biology Bacterial twig blight of willow is caused by the same bacterium that causes bacterial blight of lilac and other woody ornamentals. The disease attacks twigs and branches, […]
Willow: Marssonina leaf and twig spot Categories: Ornamental trees Ornamentals Willow Willow Diseases Last review date: 2025-06-28 08:49 Last edit date: Marssonina leaf and twig spot Photo by: R.S. Byther Biology Marssonina leaf and twig spot is a fungal infection of twigs and leaves. Initially, small brown to black spots develop on leaves and green […]
Willow: Rust Categories: Ornamental trees Ornamentals Willow Willow Diseases Last review date: 2025-06-28 08:52 Last edit date: Willow rust damage on upper leaf surface Photo by: R.S. Byther Biology Willow rusts are fungal diseases that begin in early summer but are most noticed in late summer to early fall. Leaves first display yellow spots, which […]
Willow: Twig blight (Venturia) Categories: Ornamental trees Ornamentals Willow Willow Diseases Last review date: 2025-06-28 08:53 Last edit date: Willow twig blight cankers and dieback Photo by: R.S. Byther Biology Also known as scab, willow twig blight infects leaves and twigs. The fungus first infects new foliage in the spring, causing brown to dark spots […]