Journal
MYCOLOGIA
Volume 100, Issue 3, Pages 353-374Publisher
TAYLOR & FRANCIS INC
DOI: 10.3852/07-174R
Keywords
Colletotrichum acutatum var. fioriniae; entomopathogenic fungi; epizootic; Fiorinia externa
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Funding
- Northeastern Area State and Private Forestry
- USDA Forest Service [04-CA-11244225286]
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An epizootic has been reported in Fiorinia externa populations in New York, Connecticut, Pennsylvania and New Jersey. Infected insects have profuse sclerotial masses enclosing their bodies. The most commonly isolated microorganism from infected F. externa was Colletotrichum sp. A morphological and molecular characterization of this fungus indicated that it is closely related to phytopathogenic C. acutatum isolates. Isolates of Colletotrichum sp. from F. externa in areas of the epizootic were similar genetically and were named Colletotrichum acutatum var. fioriniae var. nov. based on our findings. In vitro and in planta mating observed between isolates, S Of C. acutatum var. fioriniae could serve as a possible source of genetic variation and might give rise to new biotypes with a propensity to infect insects. Only one other strain, C. gloeosporioides f. sp. ortheziidae, has been reported to show entomopathogenic activity
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