2008. 'Cryptic' white pine blister rust infection on the bole of a 25 year old sugar pine at BLM's Boulder Creek progeny test site in southwestern Oregon. Note the production of small amounts of orange aecia in the cracks of the bark in early July 2008.
'Cryptic' white pine blister rust infection on the bole of a 25 year old sugar pine at BLM's Boulder Creek progeny test site in southwestern Oregon. Note the production of small amounts of orange aecia in the cracks of the bark in early July 2008; note also the lack of obvious stem swelling on the lower bole of this tree where the infection has likely been present for a decade or more.
Photo by: Richard Sniezko
Date: July 2008
Credit: USDA Forest Service, Region 6, Dorena Genetic Resource Center.
Source: DRGC online photo collection: www.fs.usda.gov/detail/r6/landmanagement/resourcemanageme...
Dorena Genetic Resource Center (DGRC) is the USDA Forest Service's regional service center for genetics in the Pacific Northwest Region. Dorena houses disease resistance breeding programs for five-needled pines and Port-Orford-cedar, a native plant development program, and the National Tree Climbing Program. For additional photos of the DGRC program, see: www.fs.usda.gov/detail/r6/landmanagement/resourcemanageme...
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
2008. 'Cryptic' white pine blister rust infection on the bole of a 25 year old sugar pine at BLM's Boulder Creek progeny test site in southwestern Oregon. Note the production of small amounts of orange aecia in the cracks of the bark in early July 2008.
'Cryptic' white pine blister rust infection on the bole of a 25 year old sugar pine at BLM's Boulder Creek progeny test site in southwestern Oregon. Note the production of small amounts of orange aecia in the cracks of the bark in early July 2008; note also the lack of obvious stem swelling on the lower bole of this tree where the infection has likely been present for a decade or more.
Photo by: Richard Sniezko
Date: July 2008
Credit: USDA Forest Service, Region 6, Dorena Genetic Resource Center.
Source: DRGC online photo collection: www.fs.usda.gov/detail/r6/landmanagement/resourcemanageme...
Dorena Genetic Resource Center (DGRC) is the USDA Forest Service's regional service center for genetics in the Pacific Northwest Region. Dorena houses disease resistance breeding programs for five-needled pines and Port-Orford-cedar, a native plant development program, and the National Tree Climbing Program. For additional photos of the DGRC program, see: www.fs.usda.gov/detail/r6/landmanagement/resourcemanageme...
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth