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."

Remove Filters: Diseases^(X) Conifer^(X) 5 Sizes Available^(X) Portrait^(X)

427 Images of 102 Subjects

View Subject List

View Image Details

View Thumbnails

Subject	Scientific Name	Images
annosum root disease	Heterobasidion annosum	19
Armillaria root rot	Armillaria mellea	2
Armillaria root rot	Armillaria solidipes	4
Armillaria root rots	Armillaria spp.	9
Atropellis canker	Atropellis piniphila	7
bitter rot and anthracnose	Colletotrichum gloeosporioides	1
black rot	Ceratocystis fimbriata	1
black stain root disease	Ophiostoma wageneri	3
brown felt blight	Herpotrichia juniperi	1
brown spot needle blight of pine	Mycosphaerella dearnessii	8
cedar-apple rust	Gymnosporangium juniperi-virginianae	1
Cenangium limb canker	Cenangium ferruginosum	1
comandra blister rust	Cronartium comandrae	24
common snow mold	Phacidium infestans	1
Cryptosphaeria cankers	Cryptosphaeria spp.	1
Cyclaneusma needle cast	Cyclaneusma minus	1
Cylindrocladium root diseases	Cylindrocladium spp.	1
Cytospora canker of fir	Cytospora abietis	2
Cytospora canker of spruce	Valsa kunzei	1
Cytospora cankers	Cytospora spp.	4
Dasyscypha cankers	Dasyscyphus spp.	2
Dasyscypha cankers	Lachnellula spp.	4
Delphinella canker	Delphinella balsameae	1
Dermea canker	Dermea pseudotsugae	2
Diplodia blight	Sphaeropsis sapinea	11
Diplodia tip blight	Diplodia pinastri	1
Diplodia tip blights	Diplodia spp.	5
Dothistroma needle blight	Mycosphaerella pini	2
Douglas-fir needlecast	Rhabdocline pseudotsugae	1
eastern pine gall rust	Cronartium quercuum	8
ectomycorrhizae		2
ectomycorrhizae	Pisolithus tinctorius	2
Ectomycorrhizae	Thelephora terrestris	5
Elytroderma needle cast of pine	Elytroderma deformans	8
Eutypella canker	Eutypella parasitica	1
fir broom rust	Melampsorella caryophyllacearum	5
Fusarium cortical stem rot	Fusarium avenaceum	1
fusiform rust	Cronartium quercuum f.sp. fusiforme	30
gall rust of jack pine	Cronartium quercuum f.sp. banksianae	1
Ganoderma root and butt rot	Ganoderma lucidum	1
gray mold	Botrytis cinerea	2
gray molds	Botrytis spp.	2
Gynosporanium rusts	Gymnosporangium spp.	1
heart rot	Laricifomes officinalis	2
hemlock varnish shelf	Ganoderma tsugae	3
hispidus canker	Inonotus hispidus	1
incense cedar broom rust	Gymnosporangium libocedri	3
indian paint fungus	Echinodontium tinctorium	2
laminated root disease	Phellinus weirii	2
larch needle cast	Hypodermella laricis	1
large-spored spruce-laborador tea/needle rust	Chrysomyxa ledicola	1
Leptographium root disease	Leptographium procerum	9
Leptographium root disease	Leptographium spp.	1
limb rust	Peridermium filamentosum	7
lodgepole pine needle cast	Lophodermella concolor	2
Lophodermium needle casts	Lophodermium spp.	2
Medusa needle blight	Davisomycella medusa	6
needle blight of cedar	Didymascella thujina	2
needle blight of larch	Meria laricis	1
needle cast	Bifusella saccata	1
needle cast	Virgella robusta	1
needlecast	Davisomycella attenuata	1
needlecast	Lophodermella montivaga	1
Neonectria cankers	Neonectria spp.	1
nuclear polyhedrosis virus	Nucleopolyhedrovirus	2
oyster mushroom	Pleurotus ostreatus	1
pecky cypress pocket rot	Stereum taxodii	1
Phomopsis blight	Phomopsis juniperivora	6
Phytophthora root and crown rots	Phytophthora spp.	1
Phytophthora root rot	Phytophthora cinnamomi	13
pine needle cast	Lophodermella cerina	8
pine needle cast	Lophodermium pinastri	3
pine needle rust	Coleosporium asterum	1
pine needle rusts	Coleosporium spp.	2
pinyon blister rust	Cronartium occidentale	1
pitch canker	Fusarium subglutinans	14
red heart decay bleeding fungus	Rigidoporus sanguinolentus	1
red heart of pine	Phellinus pini	4
red-belted fungus	Fomitopsis pinicola	5
Rhabdocline needlecast	Rhabdocline weirii	1
Rhabdocline needlecasts	Rhabdocline spp.	1
Rhizosphaera needle cast	Rhizosphaera kalkhoffii	2
root diseases and rots		2
root rot	Phellinus hartigii	1
Schweinitzii root and butt disease	Phaeolus schweinitzii	1
Scleroderris canker of pine and spruce	Gremmeniella abietina	4
Sirococcus blight of conifers	Sirococcus conigenus	15
southern cone rust	Cronartium strobilinum	1
southwestern white-spored gall rust	Peridermium (An undescribed species)	2
spruce broom rust	Chrysomyxa arctostaphyli	6
spruce needle cast/blight	Lirula macrospora	1
spruce needle rust	Chrysomyxa weirii	1
spruce needle rusts	Chrysomyxa spp.	2
stalactiform blister rust	Cronartium coleosporioides	11
sulfur shelf	Laetiporus sulphureus	3
sweet fern blister rust	Cronartium comptoniae	3
veiled polypore	Cryptoporus volvatus	1
violet-pored bracket fungus	Trichaptum abietinum	1
western gall rust	Endocronartium harknessii	14
white pine blister rust	Cronartium ribicola	48
white pine needlecast	Lophodermella arcuata	2
wood decay	Pholiota albocrenulata	1