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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
1427028 sudden oak death Phytophthora ramorum China Camp State Park, California
1427068 sudden oak death Phytophthora ramorum Dried ooze caused by bleeding from P. ramorum infection on coast live oak.
1427003 sudden oak death Phytophthora ramorum
1427001 sudden oak death Phytophthora ramorum
1427054 sudden oak death Phytophthora ramorum Canker and zone lines caused by P. ramorum.
0745018 Phytophthora root rot Phytophthora cinnamomi
0745019 Phytophthora root rot Phytophthora cinnamomi
0745017 Phytophthora root rot Phytophthora cinnamomi
1427102 sudden oak death Phytophthora ramorum Bark cracks and bleeding on coast live oak.
1427095 sudden oak death Phytophthora ramorum Coast live oak mortality from P. ramorum infection at China Camp State Park, CA.
1427071 sudden oak death Phytophthora ramorum Coast live oak dying from P. ramorum infection, China Camp State Park, CA.
1427050 sudden oak death Phytophthora ramorum Tanoak sprouts dying from P. ramorum infection.
1427048 sudden oak death Phytophthora ramorum Tanoak dying from P. ramorum infection, Muir Woods State Park, CA.
1427052 sudden oak death Phytophthora ramorum Tanoak dying from P. ramorum infection, Muir Woods State Park, CA.
1427046 sudden oak death Phytophthora ramorum
1427047 sudden oak death Phytophthora ramorum Tip dieback caused by P. ramorum on tanoak.
1427034 sudden oak death Phytophthora ramorum
1427033 sudden oak death Phytophthora ramorum
1427035 sudden oak death Phytophthora ramorum Big Sur, California
1427041 sudden oak death Phytophthora ramorum Big Sur, California
1427020 sudden oak death Phytophthora ramorum Big Sur, California
1427021 sudden oak death Phytophthora ramorum Big Sur, California
1427023 sudden oak death Phytophthora ramorum Big Sur, California
0364080 Phytophthora root and crown rots Phytophthora spp. on Fraser fir in nursery
1427004 sudden oak death Phytophthora ramorum
1427019 sudden oak death Phytophthora ramorum Big Sur, California
0488102 Phytophthora root rot Phytophthora cinnamomi injury to young tree
1427016 sudden oak death Phytophthora ramorum Big Sur, California
1427109 sudden oak death Phytophthora ramorum
1427022 sudden oak death Phytophthora ramorum Big Sur, California
1427051 sudden oak death Phytophthora ramorum Tanoak sprouts dying from P. ramorum infection.
1427080 sudden oak death Phytophthora ramorum Tanoak dying from P. ramorum infection, Muir Woods State Park, CA.
1427096 sudden oak death Phytophthora ramorum Tanoak dying from P. ramorum infection at Muir Woods.
1427049 sudden oak death Phytophthora ramorum Tanoak dying from P. ramorum infection.
1427110 sudden oak death Phytophthora ramorum
1427083 sudden oak death Phytophthora ramorum Zone lines of P. ramorum on coast live oak.
1427030 sudden oak death Phytophthora ramorum
1427036 sudden oak death Phytophthora ramorum
1427112 sudden oak death Phytophthora ramorum
2733025 Phytophthora root rot Phytophthora cinnamomi fading crowns, numerous cones, and short stunted needles and twigs
1427053 sudden oak death Phytophthora ramorum Tip symptoms on tanoak seedling, caused by P. ramorum.
1427113 sudden oak death Phytophthora ramorum
1427101 sudden oak death Phytophthora ramorum
1427094 sudden oak death Phytophthora ramorum Coast live oak dying from P. ramorum infection.
1427093 sudden oak death Phytophthora ramorum P. ramorum symptoms on Rhododendron in central CA. Leaves were confirmed as infected with P. ramorum by Jenny Davidson.
1427069 sudden oak death Phytophthora ramorum Signs of bleeding caused by P. ramorum infection on lichen-covered bark of coast live oak.
1427018 sudden oak death Phytophthora ramorum Big Sur, California
1442067 Phytophthora root rot Phytophthora cinnamomi Healthy (left) diseased (right)
1427070 sudden oak death Phytophthora ramorum Residual signs of bleeding caused by P. ramorum infection on bark surface lichens.
1427092 sudden oak death Phytophthora ramorum P. ramorum leaf symptoms on California laurel (bay).
1427017 sudden oak death Phytophthora ramorum Big Sur, California
1427005 sudden oak death Phytophthora ramorum
1427002 sudden oak death Phytophthora ramorum
1427103 sudden oak death Phytophthora ramorum Tip droop symptom of sudden oak death on tanoak.
1427086 sudden oak death Phytophthora ramorum Coast live oak dying from P. ramorum infection.
1427064 sudden oak death Phytophthora ramorum Coast live oak dying from P. ramorum infection.
1427074 sudden oak death Phytophthora ramorum Big Sur, California
1427090 sudden oak death Phytophthora ramorum Tanoak dying from P. ramorum infection, Muir Woods State Park, CA.
1427045 sudden oak death Phytophthora ramorum Tip dieback symptoms caused by P. ramorum on tanoak.
1427075 sudden oak death Phytophthora ramorum Tip blight symptoms on tanoak caused by P. ramorum.
1427099 sudden oak death Phytophthora ramorum Tip blight symptoms of sudden oak death on tanoak.
1427039 sudden oak death Phytophthora ramorum
1427072 sudden oak death Phytophthora ramorum Coast live oak infected with P. ramorum.
1427105 sudden oak death Phytophthora ramorum Symptom progression on coast live oaks, from wilting to dead.
1442068 Phytophthora root rot Phytophthora cinnamomi stand break up due to disease
1427006 sudden oak death Phytophthora ramorum
0364056 Phytophthora root rot Phytophthora cinnamomi symptoms on shortleaf pine
5253012 Phytophthora root rot Phytophthora cinnamomi Bleeding canker caused by Phytophthora cinnamomi, Arrayanal, Mexico
5253013 Phytophthora root rot Phytophthora cinnamomi Bleeding canker caused by Phytophthora cinnamomi, Arrayanal, Mexico
5253014 Phytophthora root rot Phytophthora cinnamomi Bleeding canker caused by Phytophthora cinnamomi, Arrayanal, Mexico
5253015 Phytophthora root rot Phytophthora cinnamomi Bleeding canker caused by Phytophthora cinnamomi, Arrayanal, Mexico
5253016 Phytophthora root rot Phytophthora cinnamomi Zone lines around canker cause by Phytophthora cinnamomi
5035035 sudden oak death Phytophthora ramorum Leaf symptoms of ramorum leaf blight on California bay laurel
5035036 sudden oak death Phytophthora ramorum Phytophthora ramorum leaf symptoms on California bay laurel
5035039 sudden oak death Phytophthora ramorum Mortality in tanoak caused by Phytophthora ramorum
5042070 sudden oak death Phytophthora ramorum Inspection of nursery infected with Phytophthora ramorum on Rhododendron.
1473271 Phytophthora root rot Phytophthora cinnamomi site #70, disease present since 1933 (picture taken 1953)
1501067 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease; Shortleaf pine
1501060 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease, sampling tools
1501061 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease; apple trap diagnosis P. cinn..
1501062 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease; crown with stress cones
1501063 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease; crown thinning
1501066 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease
1501068 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease
1501069 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease
1501071 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease; crown thinning
1501072 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease
1501074 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease
1501076 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease
1501077 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease
1501064 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease; crown thinning + healthy
1501070 Phytophthora root rot Phytophthora cinnamomi Littleleaf disease
5028050 sudden oak death Phytophthora ramorum Ramorum leaf blight symptoms on California laurel
5028051 sudden oak death Phytophthora ramorum Ramorum leaf blight on California laurel
1427067 sudden oak death Phytophthora ramorum bleeding canker
3037014 Phytophthora root rot Phytophthora cinnamomi early stage of disease
3037003 Phytophthora root rot Phytophthora cinnamomi stress crop of cones-little leaf late symptoms
5035040 sudden oak death Phytophthora ramorum
5035037 sudden oak death Phytophthora ramorum
5035038 sudden oak death Phytophthora ramorum
5055035 Phytophthora root rot Phytophthora cinnamomi
5055033 Phytophthora root rot Phytophthora cinnamomi
5055034 Phytophthora root rot Phytophthora cinnamomi
1427078 sudden oak death Phytophthora ramorum P. ramorum zone lines on coast live oak.
1427079 sudden oak death Phytophthora ramorum P. ramorum zone lines on coast live oak.
1427097 sudden oak death Phytophthora ramorum
1400148 Phytophthora root and crown rots Phytophthora spp. Fraser fir Christmas tree killed by phytophthora root disease in poorly drained portion of plantation, North Carolina.
1427082 sudden oak death Phytophthora ramorum Coast live oak mortality at China Camp State Park, CA.
1427100 sudden oak death Phytophthora ramorum Oak firewood for sale in Santa Clara, CA.
1427106 sudden oak death Phytophthora ramorum Zone lines of P. ramorum on coast live oak.
1427108 sudden oak death Phytophthora ramorum Oak firewood for sale in Santa Clara, CA
1427029 sudden oak death Phytophthora ramorum Jennifer Juzwik in the foreground.; China Camp State Park, California
1427084 sudden oak death Phytophthora ramorum Symptoms of P. ramorum on huckleberry.
1427076 sudden oak death Phytophthora ramorum Coast live oak dying from P. ramorum infection.
1427085 sudden oak death Phytophthora ramorum Bleeding on bark surface of coast live oak, caused by P. ramorum.
1427104 sudden oak death Phytophthora ramorum Zone lines of P. ramorum on coast live oak.
1427087 sudden oak death Phytophthora ramorum P. ramorum symptoms on Rhododendron. Leaf was confirmed as infected with P. ramorum by Jenny Davidson.
1427088 sudden oak death Phytophthora ramorum P. ramorum symptoms on Rhododendron. Upper leaf was confirmed as infected by Jenny Davidson.
1427111 sudden oak death Phytophthora ramorum This leaf was confirmed as positive for P. ramorum by Jenny Davidson.
1427055 sudden oak death Phytophthora ramorum P. ramorum zone lines on coast live oak.
1427056 sudden oak death Phytophthora ramorum Zone lines of P. ramorum on coast live oak.
1427057 sudden oak death Phytophthora ramorum Cankers and zone lines on coast live oak at China Camp State Park in California.
1427058 sudden oak death Phytophthora ramorum P. ramorum zone lines on coast live oak.
1427059 sudden oak death Phytophthora ramorum P. ramorum zone lines on coast live oak.
1427060 sudden oak death Phytophthora ramorum P. ramorum zone lines on coast live oak.
1427061 sudden oak death Phytophthora ramorum Bleeding from P. ramorum canker on coast live oak.
0745020 Phytophthora root rot Phytophthora cinnamomi typical soil profile of susceptible site
1427024 sudden oak death Phytophthora ramorum China Camp State Park, California
1427025 sudden oak death Phytophthora ramorum China Camp State Park, California
1427026 sudden oak death Phytophthora ramorum China Camp State Park, California
1427027 sudden oak death Phytophthora ramorum China Camp State Park, California
1427062 sudden oak death Phytophthora ramorum Showing Hypoxylon thouarsianum, a sapwood decay fungus that is also commonly isolated from Sudden Oak Death - affected oak trees, although it is also found on trees not affected by SOD. The presence of the half-dome-shaped fruiting bodies are indicative of advanced stages of SOD. Newly formed fruiting bodies are olive greenish or shiny black and release powdery green spores upon contact. Older fruiting bodies are dull black.
1427063 sudden oak death Phytophthora ramorum Showing Hypoxylon thouarsianum, a sapwood decay fungus that is also commonly isolated from Sudden Oak Death - affected oak trees, although it is also found on trees not affected by SOD. The presence of the half-dome-shaped fruiting bodies are indicative of advanced stages of SOD. Newly formed fruiting bodies are olive greenish or shiny black and release powdery green spores upon contact. Older fruiting bodies are dull black.
1427007 sudden oak death Phytophthora ramorum
1427008 sudden oak death Phytophthora ramorum
1427009 sudden oak death Phytophthora ramorum
1427031 sudden oak death Phytophthora ramorum zone lines
1427032 sudden oak death Phytophthora ramorum zone lines
0745021 Phytophthora root rot Phytophthora cinnamomi typical soil profile of susceptible site

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