| 5411403 |
leaf scorches |
|
scorch symptoms |
| 1573842 |
catfacing |
|
Close up of blossom end of immature affected fruit. Cold weather is one cause of this disorder. September 1997 |
| 1573843 |
catfacing |
|
Close up of blossom end of affected fruit. Cold weather is one cause of this disorder. September 1997 |
| 1573839 |
catfacing |
|
Close up of blossom end of affected fruit. Cold weather is one cause of this disorder. September 1997 |
| 1573651 |
unknown fungi |
|
Close up of spots on grape leaf. Disease not identified, but is likely common. July 1997 |
| 5494435 |
burl and decay |
|
|
| 5494436 |
burl and decay |
|
|
| 5494437 |
burl and decay |
|
|
| 5492739 |
burl and decay |
|
|
| 5492738 |
burl and decay |
|
|
| 5492737 |
burl and decay |
|
|
| 5483058 |
unknown virus |
|
|
| 5483059 |
unknown virus |
|
|
| 5483068 |
unknown virus |
|
|
| 5483088 |
unknown virus |
|
|
| 5395487 |
defoliation due to unknown cause |
|
|
| 5377122 |
chlorosis (general symptom) |
|
|
| 5483097 |
unknown virus |
|
Anemone spp. 'Honorine Jobert'
unknown filamentous virus |
| 5483098 |
unknown virus |
|
Anemone spp. 'Honorine Jobert'
unknown filamentous virus |
| 5483099 |
unknown virus |
|
Anemone coronaria 'de Caen'
unknown spherical virus |
| 5483100 |
unknown virus |
|
Anemone coronaria 'de Caen'
unknown spherical virus |
| 5471141 |
Phyllody agent |
|
Sesame phyllody is a very serious and destructive disease associated with phytoplasmas. |
| 5388230 |
dieback |
|
During prolonged drought periods, trees will exhibit a general thinning of the canopy. This is the tree's effort to compensate for root loss and is called defensive dieback. |
| 5460045 |
chlorosis (general symptom) |
|
|
| 5460046 |
chlorosis (general symptom) |
|
|
| 5035081 |
spruce decline |
|
Declining spruce |
| 1563129 |
unknown virus |
|
Cucumbers showing mosaic symptoms caused by a virus. |
| 1571595 |
unknown virus |
|
Watermelon foliage exhibiting symptoms typical of a virus infection. Causal agent was not identified. September 1995 |
| 1571597 |
unknown virus |
|
Watermelon foliage exhibiting symptoms typical of a virus infection intermixed with healthy vines. Causal agent was not identified. See 1571594 and 1571595, 1596 for other views of the same disease. September 1995 |
| 1571596 |
unknown virus |
|
Watermelon foliage exhibiting symptoms typical of a virus infection intermixed with healthy vines. Causal agent was not identified. See 1571594 and 1571595, 1597 for other views of the same disease. September 1995 |
| 5454784 |
chlorosis (general symptom) |
|
Chlorosis and limited rooting area?. |
| 5454783 |
chlorosis (general symptom) |
|
|
| 5445360 |
catfacing |
|
catfacing injuries to apple surface by unknown hemipteran |
| 5445358 |
catfacing |
|
Catfacing injury to pear by unknown hemipteran |
| 5445359 |
catfacing |
|
Catfacing injury to pear by unknown hemipteran |
| 5439433 |
unknown fungi |
|
|
| 5439434 |
unknown fungi |
|
|
| 5439435 |
unknown fungi |
|
|
| 5439436 |
unknown fungi |
|
|
| 5440234 |
witches' broom |
|
Witches broom caused by the fungus Apiosporina collinsii |
| 4214030 |
leaf scorches |
|
|
| 4212049 |
galls |
|
|
| 3046075 |
sycamore dieback |
|
crown thinning |
| 1436020 |
lodging |
|
|
| 1234030 |
strawberry fruit rot |
|
|
| 4823076 |
sand pine root disease |
|
Old growth tree kiled by Inonotus circinatus (Fr.) R.L. Gilbertson. One of the complex of fungi (I. circinatus, Phytophthora cinnamomi, Phaeolus schweinitzii, Verticicladiella procera, Armillariella tabescens, Heterobasidion annosum) that cause Sand Pine Root Disease. |
| 4823074 |
sand pine root disease |
|
resin leaking from trunk caused by a complex of fungi (Inonotous circinatus, Phytophthora cinnamomi, Phaeolus schweinitzii, Verticicladiella procera, Armillariella tabescens, Heterobasidion annosum). |
| 4823071 |
sand pine root disease |
|
Resin leakage at base of tree. Caused by a complex of fungi (Inonotus circinatus, Phytophthora cinnamomi, Phaeolus schweinitzii, Verticicladiella procera, Armillariella tabescens, Heterobasidion annosum). |
| 1398203 |
spruce decline |
|
Recently killed white spruce on the Chequamegon national Forest, Wisconsin. Mortality agent apparently a combination of drought, spruce budworm and armillaria root disease. |
| 1398202 |
spruce decline |
|
White spruce in northern Wisconsin dying of a general stand decline, cause apparently drought related, 2004, Chequamegon National Forest |
| 4823075 |
sand pine root disease |
|
Old growth tree kiled by Inonotus circinatus (Fr.) R.L. Gilbertson. One of the complex of fungi (I. circinatus, Phytophthora cinnamomi, Phaeolus schweinitzii, Verticicladiella procera, Armillariella tabescens, Heterobasidion annosum) that cause Sand Pine Root Disease. |
| 1436175 |
unknown virus |
|
|
| 3046074 |
sycamore dieback |
|
bark removed to show stained cambial tissue compare to image 3046076 |
| 4823073 |
sand pine root disease |
|
Resin soaked wood caused by a complex of fungi (Inonotus circinatus, Phytophthora cinnamomi, Phaeolus schweinitzii, Verticicladiella procera, Armillariella tabescens, Heterobasidion annosum). |
| 4214031 |
leaf scorches |
|
|
| 1436087 |
orchard disease problem |
|
|
| 1436025 |
unknown virus |
|
|
| 5430707 |
witches' broom |
|
|
| 5430706 |
witches' broom |
|
|
| 1467236 |
galls |
|
bacterial gall |
| 5037038 |
spruce decline |
|
Severe decline and mortality in white spruce. |
| 5037039 |
spruce decline |
|
Decline and mortality in white spruce. |
| 5037040 |
spruce decline |
|
Decline and mortality in white spruce. |
| 5037041 |
spruce decline |
|
Severe decline and mortality in white spruce. |
| 5037042 |
spruce decline |
|
Declining spruce retaining only current-year needles. |
| 5037043 |
spruce decline |
|
Severe needle loss in declining white spruce. |
| 5037044 |
spruce decline |
|
Declining spruce with severe needle loss |
| 5037045 |
spruce decline |
|
Declining white spruce with only current-year needles. |
| 5037046 |
spruce decline |
|
Needle loss in declining white spruce. |
| 5037047 |
spruce decline |
|
Needle loss in declining white spruce. |
| 5037048 |
spruce decline |
|
Declining white spruce in last stages. |
| 5037049 |
spruce decline |
|
Advanced decline and mortality in white spruce. |
| 5037050 |
spruce decline |
|
Declining spruce with sparse crowns. |
| 5037051 |
spruce decline |
|
Spruce decline crown symptoms. |
| 5037052 |
spruce decline |
|
Spruce decline, severe needle loss. |
| 5037053 |
spruce decline |
|
Needle loss and severe decline in white spruce |
| 5037054 |
spruce decline |
|
Needle loss and decline in white spruce |
| 5037056 |
spruce decline |
|
Needle loss and decline in white spruce. |
| 5047032 |
witches' broom |
|
A rare witches' broom in red pine |
| 5036039 |
spruce decline |
|
White spruce decline symptoms |
| 1241739 |
fir and spruce canker |
|
Fir and spruce cankers are easily diagnosed by cutting away the bark. An abrupt margin is seen between dead and live cambium. |
| 0162086 |
potato yellow vein disease |
|
Potato plant affected by potato yellow vein disease. |
| 1234031 |
strawberry fruit rot |
|
|
| 5407871 |
gummosis |
|
Gummy exuduate (gummosis) of unknown cause on plum |
| 1377038 |
spruce decline |
|
Severe decline and mortality of spruce caused by multiple factors working together, including drought, root disease (Armillaria), Rhizosphaera needle cast, and spruce budworm. |
| 1377037 |
spruce decline |
|
Decline of spruce caused by a complex of factors. |
| 1377039 |
spruce decline |
|
Large trees showing symptoms of spruce decline. Symptoms progress from the bottom of the tree to the top, and from the inside of the crown to the tips of the branches. |
| 5417128 |
fairy rings |
|
|
| 5417130 |
fairy rings |
|
|
| 5417126 |
fairy rings |
|
|
| 5417127 |
fairy rings |
|
|
| 5417124 |
fairy rings |
|
|
| 5417125 |
fairy rings |
|
|
| 5039009 |
burl and decay |
|
A large burl in American elm |
| 5039008 |
burl and decay |
|
A large burl in American elm |
| 5394452 |
lodging |
|
Lodging of wheat |
| 5049008 |
dieback |
|
White birch with crown dieback |
| 5364408 |
slime flux |
|
Apple tree "Black Jonathan" with slime flux, a symptom of infection. |
| 5372606 |
galls |
|
|
| 5034087 |
dieback |
|
Decline and mortality in white birch. |
| 5034082 |
dieback |
|
Small branch dieback in red maple in an urban landscape |
| 5389799 |
gummosis |
|
The hard gummy substance on the outside of bulbs is characteristic of the condition, gummosis. Susceptibility to gummosis varies by variety and maturity, with mature bulbs being more resistant. Gummosis may result from mechanical injury or ethylene gas produced by the fungus Fusarium sp., which can colonize bulbs. |
| 5335067 |
burr knot |
|
|
| 5335068 |
burr knot |
|
|
| 5382185 |
witches' broom |
|
|
| 5382174 |
witches' broom |
|
Multiple witches’ brooms along trunk. Photograph taken July 17, 2008
|
| 1473123 |
fir and spruce canker |
|
spruce cankers- branch stubs |
| 5033002 |
slime flux |
|
Slime flux associated with bacterial wetwood in elm. Associated with a number of bacteria. |
| 5033003 |
slime flux |
|
Slime flux associated with bacterial wetwood in American elm. Associatd with several species of bacteria. |
| 5033067 |
dieback |
|
Moderate dieback in the crown of a bur oak. |
| 5032056 |
spruce decline |
|
|
| 5032055 |
spruce decline |
|
|
| 5031065 |
spruce decline |
|
|
| 5337014 |
leaf distortion |
|
Physiological Leaf Distortion |
| 5337015 |
leaf distortion |
|
Physiological Leaf Distortion |
| 5337050 |
galls |
|
unknown cause |
| 5369003 |
leaf distortion |
|
Leaves showed white tissue in areas on the margins and areas of white flecking located symmetrically on the leaves. A representative from Yoder Bros. said they call this the "Lisa problem". Yoder has done extensive virus/viroid testing over time and we have never been able to associate a virus or viroid. Likewise, they have done foliar and soil analyses and not been able to associate anything consistently. Also, they have never been able to associate spray injury, etc. Yoder sees this on 'Lisa' usually in the heat of the summer. The sunken white flecks are not apparent in cooler temperatures. Usually the crop grows out of it. After several years, this flecking symptom has not been considered a major problem for the chrysanthemum crop. |
| 5369004 |
leaf distortion |
|
Leaves showed white tissue in areas on the margins and areas of white flecking located symmetrically on the leaves. A representative from Yoder Bros. said they call this the "Lisa problem". Yoder has done extensive virus/viroid testing over time and we have never been able to associate a virus or viroid. Likewise, they have done foliar and soil analyses and not been able to associate anything consistently. Also, they have never been able to associate spray injury, etc. Yoder sees this on 'Lisa' usually in the heat of the summer. The sunken white flecks are not apparent in cooler temperatures. Usually the crop grows out of it. After several years, this flecking symptom has not been considered a major problem for the chrysanthemum crop. |
| 5369005 |
leaf distortion |
|
Leaves showed white tissue in areas on the margins and areas of white flecking located symmetrically on the leaves. A representative from Yoder Bros. said they call this the "Lisa problem". Yoder has done extensive virus/viroid testing over time and we have never been able to associate a virus or viroid. Likewise, they have done foliar and soil analyses and not been able to associate anything consistently. Also, they have never been able to associate spray injury, etc. Yoder sees this on 'Lisa' usually in the heat of the summer. The sunken white flecks are not apparent in cooler temperatures. Usually the crop grows out of it. After several years, this flecking symptom has not been considered a major problem for the chrysanthemum crop. |
| 5369006 |
leaf distortion |
|
Leaves showed white tissue in areas on the margins and areas of white flecking located symmetrically on the leaves. A representative from Yoder Bros. said they call this the "Lisa problem". Yoder has done extensive virus/viroid testing over time and we have never been able to associate a virus or viroid. Likewise, they have done foliar and soil analyses and not been able to associate anything consistently. Also, they have never been able to associate spray injury, etc. Yoder sees this on 'Lisa' usually in the heat of the summer. The sunken white flecks are not apparent in cooler temperatures. Usually the crop grows out of it. After several years, this flecking symptom has not been considered a major problem for the chrysanthemum crop. |
| 5368978 |
catfacing |
|
Symptoms at stem end. Catfacing symptoms are associated with adverse growing conditions during blossoming; the adverse conditions result in poor pollination, which leads to irregularly shaped fruit. Catface symptoms are most often seen in large-fruited, fresh market varieties (although other varieties can also be affected) and are associated with disturbances in flower production such as low temperature injury 3 weeks before flowers are mature, especially in early plantings, but also with injury from growth regulators such as 2,4-d. Pruning and high nitrogen can also aggravate the problem. |
| 5368407 |
unknown virus |
|
Without testing, the diagnosis would be that of a viral infection most likely one of the cucurbit viruses: Cucumber mosaic (CMV), Watermelon mosaic (WMV), Zucchini yellow (ZYMV), Papaya ring spot virus type W (PRSV-W), and Squash mosaic (SqMV). |
| 5368408 |
unknown virus |
|
Without testing, the diagnosis would be that of a viral infection most likely one of the cucurbit viruses: Cucumber mosaic (CMV), Watermelon mosaic (WMV), Zucchini yellow (ZYMV), Papaya ring spot virus type W (PRSV-W), and Squash mosaic (SqMV). |
| 5368409 |
unknown virus |
|
Without testing, the diagnosis would be that of a viral infection most likely one of the cucurbit viruses: Cucumber mosaic (CMV), Watermelon mosaic (WMV), Zucchini yellow (ZYMV), Papaya ring spot virus type W (PRSV-W), and Squash mosaic (SqMV). |
| 5368410 |
unknown virus |
|
Without testing, the diagnosis would be that of a viral infection most likely one of the cucurbit viruses: Cucumber mosaic (CMV), Watermelon mosaic (WMV), Zucchini yellow (ZYMV), Papaya ring spot virus type W (PRSV-W), and Squash mosaic (SqMV). |
| 5368979 |
catfacing |
|
Catfacing symptoms are associated with adverse growing conditions during blossoming; the adverse conditions result in poor pollination, which leads to irregularly shaped fruit. Catface symptoms are most often seen in large-fruited, fresh market varieties (although other varieties can also be affected) and are associated with disturbances in flower production such as low temperature injury 3 weeks before flowers are mature, especially in early plantings, but also with injury from growth regulators such as 2,4-d. Pruning and high nitrogen can also aggravate the problem. |
| 5368974 |
yellow shoulder disorder |
|
Internal white tissue, Yellow eye, Yellow shoulder, and Green shoulder appear to represent a range of symptom severity for a single problem, Yellow shoulder disorder (YSD). |
| 5368975 |
yellow shoulder disorder |
|
Internal white tissue, Yellow eye, Yellow shoulder, and Green shoulder appear to represent a range of symptom severity for a single problem, Yellow shoulder disorder (YSD). |
| 5368976 |
yellow shoulder disorder |
|
Internal white tissue, Yellow eye, Yellow shoulder, and Green shoulder appear to represent a range of symptom severity for a single problem, Yellow shoulder disorder (YSD). |
| 5368977 |
catfacing |
|
Symptoms at stem end. Catfacing symptoms are associated with adverse growing conditions during blossoming; the adverse conditions result in poor pollination, which leads to irregularly shaped fruit. Catface symptoms are most often seen in large-fruited, fresh market varieties (although other varieties can also be affected) and are associated with disturbances in flower production such as low temperature injury 3 weeks before flowers are mature, especially in early plantings, but also with injury from growth regulators such as 2,4-d. Pruning and high nitrogen can also aggravate the problem. |
| 5362219 |
peach wart |
Uncharacterised agent N/A |
Peach wart symptoms on Elberta peach fruits in an orchard. |
| 5362217 |
peach wart |
Uncharacterised agent N/A |
Elberta peach with fruit symptoms of peach wart in an orchard. |
| 0725069 |
citrus blight disease |
|
A more advanced stage of blight. Note wilting and loss of leaves and some early twig dieback. This is a Valencia sweet orange on rough lemon in the Dominican Republic. |
| 0725071 |
citrus blight disease |
|
Valencia sweet orange on rough lemon in Florida in the first stages of blight. A sector of the canopy is showing zinc deficiency symptoms and a slight wilt. Sectoring is common, but may not always occur, and symptoms soon spread to the whole canopy. |
| 0725045 |
citrus blight disease |
|
Close up of zinc defficiency associated with citrus blight. |
| 0725046 |
citrus blight disease |
|
Zinc defficiency associated with citrus blight. Normal flow of water and zinc from root to canopy is disrupted by blight, and zinc actually accumulates in the wood of blighted trees. In areas where soil zinc levels are relatively low blighted trees |
| 0725047 |
citrus blight disease |
|
Advanced wilting. |
| 0725021 |
citrus blight disease |
|
Typical citrus blight symptoms in Florida on Valencia sweet orange. Note wilting in leaves and presence of off season bloom. |
| 0725020 |
citrus blight disease |
|
Zinc defficiency associated with citrus blight. Normal flow of water and zinc from root to canopy is disrupted by blight, and zinc actually accumulates in the wood of blighted trees. |
| 0725019 |
citrus blight disease |
|
Advanced symptoms of citrus blight. Tree has extensive dieback and is now producing interior shoot of new growth. Blighted trees usually do not die, but remain in this chronic stage. |
| 5359208 |
unknown virus |
|
An expanding summer squash leaf showing symptoms of an unknown virus infection in the field. |
| 5357108 |
fairy rings |
|
Lawn showing symptoms of infection with fairy ring fungi. Lens cap provided for scale. |
| 5359207 |
unknown virus |
|
Young summer squash leaf showing symptoms of an unknown virus in the field. |
| 5357029 |
fairy rings |
|
Lawn showing necrotic areas typical of Type 1 infection with fairy ring fungi. |
| 5359684 |
peach wart |
Uncharacterised agent N/A |
Small peach fruits showing symptoms of infection with Peach Wart Virus. |
| 1473264 |
needle droop |
|
unknown cause, needle fasical droops and needles fade; 7/1/1956 site Coconino Co., Fort Valley |
| 5357027 |
fairy rings |
|
Fairway of a golf course with dark green areas typical of Type 2 infection with fairy ring fungi. |
| 5356890 |
witches' broom |
|
Jujube tree with witches' brooms, caused by infection with a phytoplasma. |
| 5356889 |
witches' broom |
|
Jujube tree with witches' brooms, caused by infection with a phytoplasma. |
| 5356888 |
witches' broom |
|
Jujube tree with witches' brooms, caused by infection with a phytoplasma. |
| 5356667 |
unknown virus |
|
Pumpkin leaves showing symptoms of infection with an unknown virus. |
| 5357123 |
Rice yellow dwarf |
|
Potted rice plants displaying symptoms of infection with Rice Yellow Dwarf phytoplasma. |
| 5357057 |
citrus blight disease |
|
Citrus leaf showing symptoms of infection with bacterial blight. |
| 5359205 |
unknown virus |
|
Jalapeno pepper fruits showing symptoms of a viral infection in the field. |
| 5359204 |
unknown virus |
|
Jalapeno pepper leaves showing symptoms of a viral infection in the field. |
| 5359202 |
unknown virus |
|
Jalapeno pepper leaves showing symptoms of a viral infection in the field. |
| 5359203 |
unknown virus |
|
A Jalapeno pepper leaf showing symptoms of a viral infection in the field. |
| 5359201 |
unknown virus |
|
A bell pepper fruit showing symptoms of a viral infection. |
| 5358920 |
unknown virus |
|
A bell pepper leaf showing symptoms of virus ring spot infection. |
| 5358919 |
unknown virus |
|
A bell pepper plant showing symptoms of virus ring spot infection in the field. |
| 5359206 |
unknown virus |
|
Bell pepper plants showing symptoms of a viral infection in the field. |
| 5362920 |
unknown virus |
|
Underside of pepper leaves showing symptoms of infection with an unknown virus. |
| 5362919 |
unknown virus |
|
Pepper plants showing symptoms of infection with an unknown virus. |
| 5362918 |
unknown virus |
|
Pepper plants showing symptoms of infection with an unknown virus. |
| 5356796 |
unknown virus |
|
Pepper transplants showing symptoms of infection with an unknown virus. |
| 5357110 |
unknown virus |
|
African violet plant (Saintpaulia sp.) with leaves showing symptoms of viral infection. |
| 5359564 |
unknown virus |
|
Symptoms of curly top virus, as displayed in a bean plant. |
| 5359565 |
unknown virus |
|
Symptoms of curly top virus, as displayed in a bean plant. |
| 5357313 |
unknown virus |
|
Potato plants showing symptoms of infection with an unknown virus. |
| 5367206 |
unknown fungi |
|
Root collar rot on a honeylocust tree (Gleditsia triacanthos). |
| 5367205 |
unknown fungi |
|
Root collar rot on a honeylocust tree (Gleditsia triacanthos). |
| 5367203 |
unknown fungi |
|
Root collar rot on a honeylocust tree (Gleditsia triacanthos). |
| 5367204 |
unknown fungi |
|
Root collar rot on a honeylocust tree (Gleditsia triacanthos). |
| 5366764 |
unknown virus |
|
Leaf of green ash (Fraxinus pennsylvanica) showing symptoms of either Tomato Ringspot Virus or Tobacco Mosaic Virus. |
| 5366763 |
unknown virus |
|
Leaf of green ash (Fraxinus pennsylvanica) showing symptoms of either Tomato Ringspot Virus or Tobacco Mosaic Virus. |
| 5366644 |
unknown virus |
|
Corn leaf displaying symptoms of Maize Pellucid Ringspot Virus. |
| 5356703 |
Grapevine Vein Yellows and Leaf Roll |
|
Leaf Roll Virus in a grape leaf, and a beetle of unknown species. Note coloration of the leaf veins. |
| 5364342 |
unknown virus |
|
Symptoms of an unknown presumptive viral disease of dry bean. |
| 5364341 |
unknown virus |
|
Symptoms of an unknown presumptive viral disease of dry bean - yellowing on the upper surface of the leaf. |
| 5364340 |
unknown virus |
|
Symptoms of an unknown presumptive viral disease of dry bean. |
| 5364339 |
unknown virus |
|
Symptoms of an unknown presumptive viral disease of dry bean. |
| 5364338 |
unknown virus |
|
Symptoms of an unknown presumptive viral disease of dry bean. |
| 1473055 |
burl and decay |
|
front view |
| 1473056 |
burl and decay |
|
side view |
| 1473057 |
burl and decay |
|
cross-sectional view |
| 1473007 |
burl and decay |
|
tree 368 |
| 5191002 |
rhododendron shoot proliferation |
|
|
| 5191003 |
rhododendron shoot proliferation |
|
|
| 5191004 |
rhododendron shoot proliferation |
|
|
| 5191005 |
rhododendron shoot proliferation |
|
|
| 5191006 |
rhododendron shoot proliferation |
|
|
| 5031057 |
spruce decline |
|
Severe symptoms of spruce decline on the Chequamegon-Nicolet National Forest. The disease is caused by a complex set of factors that result in decline and death of the tree. |
| 5031048 |
spruce decline |
|
Spruce decline caused by a complex of factors on the Chequamegon-Nicolet National Forest. |
| 5032001 |
spruce decline |
|
|
| 5036032 |
spruce decline |
|
crown symptoms |
| 5036033 |
spruce decline |
|
crown symptoms |
| 5036034 |
spruce decline |
|
|
| 5036035 |
spruce decline |
|
crown symptoms |
| 5036036 |
spruce decline |
|
crown symptoms |
| 5036037 |
spruce decline |
|
crown symptoms |
| 5036038 |
spruce decline |
|
crown symptoms |
| 5036041 |
spruce decline |
|
crown symptoms |
| 5036042 |
spruce decline |
|
|
| 5036044 |
spruce decline |
|
crown symptoms |
| 5036045 |
spruce decline |
|
|
| 5036047 |
spruce decline |
|
crown symptoms |
| 5036048 |
spruce decline |
|
|
| 5036049 |
spruce decline |
|
|
| 5036050 |
spruce decline |
|
|
| 5036051 |
spruce decline |
|
|
| 5036053 |
spruce decline |
|
|
| 5036054 |
spruce decline |
|
|
| 5036055 |
spruce decline |
|
|
| 5036056 |
spruce decline |
|
|
| 5036057 |
spruce decline |
|
|
| 5036058 |
spruce decline |
|
|
| 1467024 |
burl and decay |
|
February, 1979 |
| 2122025 |
leaf scorches |
|
Leaf scorch on aspen foliage, South Park, CO |
| 2122026 |
leaf scorches |
|
|
| 2122024 |
leaf scorches |
|
Aerial view of leaf scorch of quaking aspen, Colorado |
| 1241740 |
fir and spruce canker |
|
Valsa and Leucostoma occasionally cause cankers on large stems. |
| 1241741 |
fir and spruce canker |
|
Canker progressing from a branch into the stem. |
| 1241742 |
fir and spruce canker |
|
Fir and spruce cankers are usually on branches, causing flagging. |
| 0590026 |
galls |
|
unknown etiology; caused by bact./virus/mycoplasma |
