PESTS AND DISEASES OF FORESTRY IN NEW ZEALAND
Elm leaf spot Phloeospora ulmi
Elm leaf spot caused by Phloeospora ulmi
From Scion publication An Introduction to The Diseases of Forest and Amenity Trees in New Zealand,
Forest Research bulletin 220, G.S. Ridley and M.A. Dick 2001
Species:
Phloeospora ulmi (Ascomycete anamorph)
Common name:
None
Country of origin:
Northern Hemisphere
Host(s):
Ulmus glabra and other Ulmus spp.
Symptoms:
Causes irregular brown spots (Fig. 47).
Fig. 47: Irregular brown spots on Ulmus glabra caused by Phloeospora ulmi
Disease development:
Unknown.
NZ distribution: It is found throughout the North Island of New Zealand. Its presence in the South Island is unknown.
Economic impact:
In Europe Phloeospora ulmi is considered common but unimportant.
Control: None.
References: Ellis& Ellis 1985; Smith et al. 1988; Spaulding 1961.
