| 5483097 |
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 |
| 5460046 |
chlorosis (general symptom) |
|
|
| 5454687 |
dieback |
|
Urban tree decline. |
| 5035081 |
spruce decline |
|
Declining spruce |
| 5454785 |
chlorosis (general symptom) |
|
|
| 5454868 |
burl and decay |
|
Burls. |
| 5458613 |
rose rosette disease |
Uncharacterised agent RRD |
Witches' broom of rose rosette disease with bright red shoots emerging in the spring. |
| 5047032 |
witches' broom |
|
A rare witches' broom in red pine |
| 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. |
| 5407871 |
gummosis |
|
Gummy exuduate (gummosis) of unknown cause on plum |
| 5408101 |
fairy rings |
|
|
| 5392955 |
gummosis |
|
|
| 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. |
| 5031065 |
spruce decline |
|
|
| 5382348 |
defoliation due to unknown cause |
|
|
| 5382349 |
defoliation due to unknown cause |
|
Aerial view of aspen defoliation due to unknown agent |
| 5382350 |
defoliation due to unknown cause |
|
Aerial view of aspen defoliation due to unknown agent
|
| 5382351 |
defoliation due to unknown cause |
|
Aerial view of defoliation by an unknown agent |
| 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). |
| 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). |
| 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. |
| 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. |
| 5031048 |
spruce decline |
|
Spruce decline caused by a complex of factors on the Chequamegon-Nicolet National Forest. |
| 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. |
| 1238005 |
galls |
|
Galling on Dead Eastern White Pine. |
| 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. |
