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USDA Forest Service

USDA Forest Service

The U.S. Department of Agriculture Forest Service is a Federal agency that manages public lands in national forests and grasslands. The Forest Service is also the largest forestry research organization in the world, and provides technical and financial assistance to state and private forestry agencies. Gifford Pinchot, the first Chief of the Forest Service, summed up the purpose of the Forest Service—"to provide the greatest amount of good for the greatest amount of people in the long run."
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Image Subject Name Scientific Name Description
1377028 eastern pine gall rust Cronartium quercuum Several clustered galls
5061062 white pine blister rust Cronartium ribicola Early upper-leaf symptoms of Cronartium ribicola on Ribes.
5302004 white pine blister rust Cronartium ribicola Inoculating white pine with Cronartium ribicola in the lab
5302005 white pine blister rust Cronartium ribicola Inoculating white pine with Cronartium ribicola in the lab
5302009 white pine blister rust Cronartium ribicola Symptomatic white pine seedlings being screened for blister rust resistance
5302008 white pine blister rust Cronartium ribicola Greenhouse trials for white pine blister rust screening
5061087 white pine blister rust Cronartium ribicola White pine top kill
5061089 white pine blister rust Cronartium ribicola Small "flagged branches"
5061090 white pine blister rust Cronartium ribicola An infected branch flag in a large white pine
5061091 white pine blister rust Cronartium ribicola Small branch infection
5061092 white pine blister rust Cronartium ribicola Small branch infection
5061093 white pine blister rust Cronartium ribicola Several small branch infections on a single tree
5061094 white pine blister rust Cronartium ribicola Small branch infection
5061060 white pine blister rust Cronartium ribicola Early symptoms of white pine blister rust on the main bole of a sapling.
1377027 eastern pine gall rust Cronartium quercuum A sporulating gall (the orange-yellow pustules are aecia)nearly girdling a jack pine branch.
5040085 white pine blister rust Cronartium ribicola Rust lesions (uredinia) on Ribes
5056094 white pine blister rust Cronartium ribicola White pine blister rust inoculation trials at U.S. Forest Service Oconto River Seed Orchard. Ribes plants used for cultivating Cronartium spores.
5054082 western gall rust Endocronartium harknessii Individual gall
5054083 western gall rust Endocronartium harknessii Gall of Peridermium harknessii
5054084 western gall rust Endocronartium harknessii Stem-girdling gall
5054085 western gall rust Endocronartium harknessii Jack pine gall rust individual gall
5054087 western gall rust Endocronartium harknessii Old gall of jack pine gall rust
5039002 western gall rust Endocronartium harknessii Jack pine gall rust, individual gall
5054089 western gall rust Endocronartium harknessii Jack pine gall rust, multiple galls
5056088 white pine blister rust Cronartium ribicola White pine blister rust inoculation trials at U.S. Forest Service Oconto River Seed Orchard
5056089 white pine blister rust Cronartium ribicola White pine blister rust inoculation trials at U.S. Forest Service Oconto River Seed Orchard
5056090 white pine blister rust Cronartium ribicola White pine blister rust inoculation trials at U.S. Forest Service Oconto River Seed Orchard
5042098 white pine blister rust Cronartium ribicola Aecial sacs of Cronartium ribicola on eastern white pine.
5034057 western gall rust Endocronartium harknessii Large gall caused by Peridermium harknessii on jack pine.
5032066 white pine blister rust Cronartium ribicola Top kill in white pine caused by white pine blister rust.
5034007 eastern pine gall rust Cronartium quercuum Jack pine gall rust galls.
5030002 western gall rust Endocronartium harknessii Single gall on jack pine
5030003 western gall rust Endocronartium harknessii Sporulating gall
5030004 western gall rust Endocronartium harknessii Sporulating gall
5030005 western gall rust Endocronartium harknessii Non-sporulating gall
5030006 western gall rust Endocronartium harknessii Sporulating gall, almost girdling a sapling
5030007 western gall rust Endocronartium harknessii Multiple galls
5030008 western gall rust Endocronartium harknessii Multiple galls
5030009 western gall rust Endocronartium harknessii Sporulating gall
5030010 western gall rust Endocronartium harknessii Sporulating gall
5030011 western gall rust Endocronartium harknessii
5030012 western gall rust Endocronartium harknessii Small gall
5030013 western gall rust Endocronartium harknessii Single gall on jack pine branch.
5037034 western gall rust Endocronartium harknessii
5032048 white pine blister rust Cronartium ribicola rust cankers
5032051 white pine blister rust Cronartium ribicola
5032052 white pine blister rust Cronartium ribicola
5032062 white pine blister rust Cronartium ribicola copious resin flow
5032065 white pine blister rust Cronartium ribicola telia on Ribes sp.
5047035 white pine blister rust Cronartium ribicola aecia
5047036 white pine blister rust Cronartium ribicola aecia
5047037 white pine blister rust Cronartium ribicola canker
5061030 white pine blister rust Cronartium ribicola
5061031 white pine blister rust Cronartium ribicola
5061033 white pine blister rust Cronartium ribicola
5061036 white pine blister rust Cronartium ribicola
5061038 white pine blister rust Cronartium ribicola
5061041 white pine blister rust Cronartium ribicola
5061042 white pine blister rust Cronartium ribicola
5061043 white pine blister rust Cronartium ribicola
5061044 white pine blister rust Cronartium ribicola
5061046 white pine blister rust Cronartium ribicola
5061047 white pine blister rust Cronartium ribicola
5061048 white pine blister rust Cronartium ribicola
5061054 white pine blister rust Cronartium ribicola
5061055 white pine blister rust Cronartium ribicola on alternate host
5061056 white pine blister rust Cronartium ribicola on alternate host
5061057 white pine blister rust Cronartium ribicola on alternate host
5061058 white pine blister rust Cronartium ribicola on alternate host
5061059 white pine blister rust Cronartium ribicola on alternate host
5061063 white pine blister rust Cronartium ribicola
5061064 white pine blister rust Cronartium ribicola
5061066 white pine blister rust Cronartium ribicola
5061067 white pine blister rust Cronartium ribicola
5061075 white pine blister rust Cronartium ribicola cankers
5061078 white pine blister rust Cronartium ribicola
5061079 white pine blister rust Cronartium ribicola rust cankers
5061080 white pine blister rust Cronartium ribicola rust cankers
5061081 white pine blister rust Cronartium ribicola rust canker
5061083 white pine blister rust Cronartium ribicola
5061084 white pine blister rust Cronartium ribicola
5050007 comandra blister rust Cronartium comandrae
5050009 comandra blister rust Cronartium comandrae
1198029 eastern pine gall rust Cronartium quercuum Indistinguishable from western gall rust (pine-pine rust, Endocronartium harknessii) without microscopic examination of spore germination.
1301050 white pine blister rust Cronartium ribicola Ueredinial stage.

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