Willow: Bacterial twig blight categories: Ornamental trees Ornamentals Willow Willow Diseases revision date: 2022-11-29 12:00 Willow bacterial twig blightPhoto 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, causing them to die back. […]
Willow: Marssonina leaf and twig spot categories: Ornamental trees Ornamentals Willow Willow Diseases revision date: 2022-11-29 12:00 Marssonina leaf and twig spotPhoto 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 twigs. The spots may have […]
Willow: Rust categories: Ornamental trees Ornamentals Willow Willow Diseases revision date: 2022-11-29 12:00 Willow rust damage on upper leaf surfacePhoto 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 turn dark brown or black […]
Willow: Twig blight (Venturia) categories: Ornamental trees Ornamentals Willow Willow Diseases revision date: 2022-11-29 12:00 Willow twig blight cankers and diebackPhoto 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 along the midrib of the […]