USDA Forest Service:
1989. Region 6 Forest Pest Management Staff.
USDA Forest Service:
1989. Western spruce budworm defoliation. Yakima Indian Reservation, Washington.
USDA Forest Service:
1996. Forest pathologists Craig L. Schmitt (left) and James S. Hadfield at the 50 Years of Aerial Survey celebration in Portland, Oregon.
USDA Forest Service:
c.1997. C&C. L-R back: Jeff Moore (WDNR), Dave Bridgwater (FS), Suzanne Wiley (FS), Tim McConnell (FS), Mike McWilliams (ODF), Keith Sprengel (FS), unknown, Dave Overhulser (ODF). Front L-R: Yolanda Barnett (FS), Karen Ripley (WDNR), Roy Magelssen (FS).
USDA Forest Service:
2000. Bill Woodruff (R5 - left) and Roy Magelssen. Aerial survey Calibration and Conformity training.
USDA Forest Service:
2000. C&C. Back l-r: Jeff Moore, Jeff Jenkins, Rayburn Mitchell, Mike McWilliams, Keith. Sprengel, Dave Overhulser. Middle l-r: Ellen Goheen, Yolanda Barnett, and Beth Willhite. Front: Carrie Burns and Roy Magelssen.
USDA Forest Service:
2002. Roy Magelssen constructing a spruce beetle trap. An infested spruce bolt will be placed inside the trap. This is used to determine the time when adult beetles emerge. Wenatchee, Washington.
USDA Forest Service:
c.2002. Aerial Survey Aviation Safety and Management (AS2M) Course. Orlando, Florida.
USDA Forest Service:
c.2003. C&C training. L-R back: Beth Willhite, Bob Schroeter, Jeff Moore, Tim McConnell, Karen Ripley, Suzanne Wiley , Ben Smith, Melanie Kallas, Dave Bridgwater, Jack Prukop, Mike McWilliams Front L-R: Roy Magelssen, Rayburn Mitchell, Keith Sprengel.
USDA Forest Service:
2005. USFS Forest Health Protection technical meeting, group photo. Portland, Oregon.
USDA Forest Service:
2005. Ellen Goheen presenting (center); Sheila Martinson (left) and Kristen Chadwick (right) taking notes, at the first meeting of the Pacific Coast Whitebark Pine Working Group. Crater Lake National Park, Oregon.
USDA Forest Service:
2006. Forest pathologist Jim Hadfield. Wenatchee Forest Insect and Disease Service Center.
USDA Forest Service:
2006. Washington Office review of the R6 Forest Health Protection and Dorena Genetic Resource Center programs. Field trip. Enterprise, Oregon.
USDA Forest Service:
2006. Washington Office review of the R6 Forest Health Protection and Dorena Genetic Resource Center programs. Field trip. Enterprise, Oregon.
USDA Forest Service:
2006. Washington Office review of the R6 Forest Health Protection and Dorena Genetic Resource Center programs. Field trip. Enterprise, Oregon.
USDA Forest Service:
2006. Washington Office review of the R6 Forest Health Protection and Dorena Genetic Resource Center programs. Field trip. Enterprise, Oregon.
USDA Forest Service:
c.2007. Hemlock looper defoliation. Bacon Creek. Mount Baker Snoqualmie National Forest, Washington.
USDA Forest Service:
2007. National Park Service and US Forest Service personnel applying MCH to protect trees from Douglas-fir beetle attack. Grove of the Patriarchs, Mt. Rainier National Park, Washington.
USDA Forest Service:
2009. Alison Nelson setting up a whitebark pine monitoring plot at Timberwolf Creek in the Pasayten Wilderness, Washington.
USDA Forest Service:
2010. Roy Magelssen using a fertilizer spreader to spread verbenone flakes in a whitebark pine stand. Chelan Ranger District, Wenatchee National Forest, Washington.
USDA Forest Service:
2010. Glenn Kohler (left) forest entomologist with WDNR, and Roy Magelssen with the Wenatchee Service Center, preparing Douglas-fir tussock moth eggs and diet. The eggs were reared to determine naturally occurring levels of virus and parasitism. Olympia,
USDA Forest Service:
2010. Douglas-fir tussock moth diet. DFTM eggs were reared to determine the naturally occurring levels of virus and parasitism. Olympia, Washington.
USDA Forest Service:
2010. Douglas-fir tussock moth eggs and diet; eggs were reared to determine natural levels of virus and parasitism. Olympia, Washington.
USDA Forest Service:
2010. Douglas-fir tussock moth first instars. DFTM eggs were reared to determine the naturally occurring levels of virus and parasitism. Olympia, Washington.
USDA Forest Service:
2010. Douglas-fir tussock moth second and third instars. DFTM eggs were reared to determine the naturally occurring levels of virus and parasitism. Olympia, Washington.
USDA Forest Service:
2010. Douglas-fir tussock moth virus determination - stained smears. Olympia, Washington.
USDA Forest Service:
2010. Roy Magelssen looking for polyhedral inclusion bodies (PIB). Douglas-fir tussock moth eggs were reared to determine the naturally occurring levels of virus and parasitism. Olympia, Washington.
USDA Forest Service:
2010. Douglas-fir tussock moth virus determination; low number of polyhedral inclusion bodies (PIB). Washington State Department of Natural Resources laboratory. Olympia, Washington.
USDA Forest Service:
2010. Douglas-fir tussock moth virus determination; high number of polyhedral inclusion bodies (PIB). Washington State Department of Natural Resources laboratory. Olympia, Washington.
USDA Forest Service:
2010. Douglas-fir tussock moth virus determination. Polyhedral inclusion bodies (PIB) with trachea. Olympia, Washington.
