ARS | Publication request: PHYLLACTINIA GUTTATA IS A HOST FOR CLADOSPORIUM UREDINICOLA IN WASHINGTON STATE

Submitted to: Pacific Northwest Fungi
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: December 6, 2005
Publication Date: May 1, 2006
Repository URL: http://hdl.handle.net/10113/18591
Citation: Dugan, F.M., Glawe, D.A. 2006. Phyllactinia guttata is a host for cladosporium uredinicola in washington state. Pacific Northwest Fungi. 1(1):1-5. DOI: 10.2509/pnwf.2006.001.001.

Interpretive Summary: We report the fungus Cladosporium uredinicola growing on another fungus, the powdery mildew Phyllactinia guttata, a parasite of hazelnut. C. uredinicola is fungus best known for parasitizing rust fungi, themselves plant parasites. New records of fungi parasitized by C. uredincola are of interest because of the possibility that C. uredinicola might be used as a biological control agent for plant parasitic fungi, especially rusts and powdery mildews. Although there are published reports of C. uredinicola growing on other powdery mildews, and published reports of other Cladosporium species growing parasitically on Phyllactinia guttata, we know of no published reports of C. uredinicola growing on P. guttata. We also describe the manner in which the fruiting bodies (ascocarps) of the powdery mildew are colonized by C. uredinicola.

Technical Abstract: The powdery mildew fungus Phyllactinia guttata, parasitic on European hazelnut (Corylus avellana), is a host for the fungicolous hyphomycete Cladosporium uredinicola in Washington State. Mucilaginous penicillate cells at the apices of the Phyllactinia ascocarps are the primary site for colonization and sporulation by C. uredinicola. Range of morphological variation in C. uredinicola from P. guttata was congruent with previous descriptions from hosts in Uredinales.