Cotoneaster: Bacterial blight categories: Cotoneaster Cotoneaster Diseases Ornamentals Shrubs last review date: 2026-04-23 09:24 Cotoneaster fire blight Photo by: R. Maleike Biology Bacterial blight symptoms first appear in the spring (April-May) as brown spots on young stems and leaves, followed by wilted and blackened new growth. The disease is especially favored by wet conditions. Infection […]
Cotoneaster: Fire blight categories: Cotoneaster Cotoneaster Diseases Ornamentals Shrubs last review date: 2026-04-23 10:05 Cotoneaster fire blight Photo by: R. Maleike Biology Fire blight is a bacterial disease which initially infects via flowers. Common symptoms include water-soaked spots on the bark, cankers at the base of affected twigs, and droplets of a dark bacterial ooze […]
Cotoneaster: Scab categories: Cotoneaster Cotoneaster Diseases Ornamentals Shrubs last review date: 2026-04-23 10:19 Apple scab on leaves and young fruit Photo by: R.S. Byther Biology Symptoms of scab on cotoneaster are similar to those on apple. A fungal disease, scab causes leaves and fruit to develop dark or black blotchy spots. Initially, the leaves show […]
Cotoneaster: Cotoneaster webworm categories: Cotoneaster Cotoneaster Insects Ornamentals Shrubs last review date: 2026-04-23 09:37 Cotoneaster webworm damage Photo by: C.R. Foss Biology The cotoneaster webworm is a dark brown caterpillar, 1/4″ to 1/2″ long. It typically ties clumps of leaves together with webbing and feeds within the nests, skeletonizing leaves. The caterpillars feed during the […]
Cotoneaster: Spider mites categories: Cotoneaster Cotoneaster Insects Ornamentals Shrubs last review date: 2026-04-23 10:28 Spider mites under microscope Photo by: L.K. Tanigoshi Biology Spider mites are tiny, eight-legged, and of various colors from yellowish to dark to red. They may be found on the upper or lower surface of leaves and often produce a fine […]