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First report of the white pine blister rust fungus, Cronartium ribicola, on Pedicularis bracteosa

Posted date: August 28, 2007
Publication Year: 
2007
Authors: Zambino, P. J.; Richardson, Bryce A.; McDonald, G. I.
Publication Series: 
Scientific Journal (JRNL)
Source: USDA Forest Service, Rocky Mountain Research Station, Moscow, ID 83843. Plant Disease. 91: 467.

Abstract

Until recently, Cronartium ribicola J.C. Fisch. was thought to utilize only Ribes spp. (Grossulariaceae) as telial hosts in North America. During 2004, Pedicularis racemosa Dougl. ex Benth. and Castilleja miniata Dougl. (Orobanchaceae) were proven as natural telial hosts at a subalpine site (48.634109°N, 116.570817°W, elevation 1,800 m) near Roman Nose Lake, ID, where whitebark pine (Pinus albicaulis Engelm.) and western white pine (Pinus monticola Dougl. ex D. Don) are aecial hosts, and Pedicularis, Castilleja, and Ribes spp. are common herbs/shrubs (2). During August 2006, teliospore columns typical of C. ribicola or the morphologically indistinguishable (2) C. coleosporioides J.C. Arthur were found on two Pedicularis bracteosa Benth. plants at this site, within 3 m of a large, sporulating canker on whitebark pine.

Citation

Zambino, P. J.; Richardson, B. A.; McDonald, G. I. 2007. First report of the white pine blister rust fungus, Cronartium ribicola, on Pedicularis bracteosa. Plant Disease. 91: 467.