Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (159.0 KB bytes)

Title: First report of the white pine blister rust fungus, Cronartium ribicola, infecting Ribes inerme in north-central Utah

Author: Vogler, D. R.; Geils, B. W.; Coats, K.;

Date: 2017

Source: Plant Disease

Publication Series: Scientific Journal (JRNL)

Description:

Cronartium ribicola Fisch. has not been found infecting any of the five-needle white pines (Pinus subgenus Strobus) in Utah, despite being established on both white pine and Ribes hosts in the other 10 western states, defined as those west of the 102° meridian. Krebill (1964) reported C. ribicola infecting limber pine 53 km north of the Utah border in the Wasatch Mountains of southern Idaho. Apparently, this is the closest to the northern border of Utah the pathogen had spread to that date. Thirty-six years after Krebill’s report, Smith and Hoffman (2000) reported finding no evidence of C. ribicola infecting either Ribes or Pinus hosts in their host range-wide sampling locations in Utah. However, in September 2005, while scouting for signs and symptoms of blister rust in Utah, coauthor B. W. Geils collected what appeared to be white pine blister rust-infected Ribes inerme Rydb. leaves at a location 257 km south of Krebill’s Idaho discovery. The original rust-infected R. inerme voucher specimens, acquisition no. KPK-1084, are archived in the Kamal Prasad Kaphle Fungal Herbarium in the Mirov Laboratory at our Institute of Forest Genetics. No five-needle pines were found at or near the new discovery site. The infected Ribes leaves were located in Duchesne Co., Utah, at 2,505 m elevation just east of Highway 191, 2.9 km south of Argyle Ridge (the southern boundary of the Ashley National Forest), at a road turnout near a tributary of Willow Creek, a perennial southward-flowing stream (39.86133°N, 110.76528°W). Since pinyon pine occurs nearby, Geils hypothesized that the pathogen might be the pinyon rust, C. occidentale Hedgc., Bethel, & N. Hunt, and was hesitant to conclude that he had found white pine blister rust in Utah, since the fungal fruiting structures on Ribes are virtually indistinguishable between C. occidentale and C. ribicola. We obtained a sequence of the rust fungus infecting the Utah R. inerme leaves, and can confirm that the pathogen is C. ribicola, not C. occidentale. DNA extracted from the scraped telia present on dried samples of Ribes leaves was amplified and sequenced using basidiomycete-specific primers ITS1F and ITS4B (Gardes and Bruns 1993). BLASTN analysis of the 783-bp sequence (GenBank accession no. KX574672) showed that it differs by only three nucleotides (0.38%) from the matching segment of a C. ribicola ITS reference sequence (DQ533975). Now that C. ribicola has been confirmed on Ribes in Utah, the pathogen might also be established there on pine, although there is no evidence of that at present.

Keywords: Cronartium ribicola, Ribes inerme, white pine blister rust, Utah

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

XML: View XML

Citation:


Vogler, D. R.; Geils, B. W.; Coats, K. 2017. First report of the white pine blister rust fungus, Cronartium ribicola, infecting Ribes inerme in north-central Utah. Plant Disease. 101(2): 386.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.