Journal
MYCOLOGIA
Volume 103, Issue 2, Pages 325-332Publisher
TAYLOR & FRANCIS INC
DOI: 10.3852/10-124
Keywords
insect-associated fungi; Juglans nigra; Juglans species; phytopathogenic fungi; thousand cankers disease
Categories
Funding
- USDA Forest Service
- USDA-AFRI
- USDA Western Regional IPM program
- [GACR 206/08/P322]
- [MSM 6007665801]
- [AV0Z50200510]
Ask authors/readers for more resources
Widespread morbidity and mortality of Juglans nigra has occurred in the western USA over the past decade. Tree mortality is the result of aggressive feeding by the walnut twig beetle (Pityophthorus juglandis) and subsequent canker development around beetle galleries caused by a filamentous ascomycete in genus Geosmithia (Ascomycota: Hypocreales). Thirty-seven Geosmithia strains collected from J. californica, J. hindsii, J .major and J. nigra in seven USA states (AZ, CA, CO, ID, OR, UT, WA) were compared with morphological and molecular methods (ITS rDNA sequences). Strains had common characteristics including yellowish conidia en masse, growth at 37 C and absence of growth on Czapek-Dox agar and belonged to a single species described here as G. morbida. Whereas Geosmithia are common saprobes associated with bark beetles attacking hardwoods and conifers worldwide, G. morbida is the first species documented as a plant pathogen.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available