Ulmus davidiana
Videos
Ulmus davidiana, also known as the David elm, or Father David elm, is a small deciduous tree widely distributed across China, Mongolia, Korea, Siberia, and Japan, where it is found in wetlands along s
SHHG Ulmus davidiana
Bark of juvenile tree, Sir Harold Hillier Gardens
Dutch elm disease
Videos
Dutch elm disease is caused by an Ascomycete fungus that kills elm trees, and is spread by elm bark beetles. Believed to be originally native to Asia, the disease was accidentally introduced into Amer
Ulmus davidiana
…long × < 14 mm (1/2 in) wide. Evaluated with other Chinese elms at the Morton Arboretum in Illinois, the tree was found to have a good resistance to Dutch elm disease (DED) . The species is reputed to have a good resistance to elm leaf beetle Xanthogaleruca luteola, elm yellows (elm phloem necrosis) and leafminers…
On a golden elm with characteristic leaf shedding
Asexual synnema of the pathogenic fungus Ophiostoma ulmi can overwinter in bark and wood, and can be spread by beetle vectors.
Beetle feeding galleries on wych elm trunk
Branch death, or flagging, at multiple sites in the crown of a diseased elm