| Image |
Descriptor |
Description |
Photographer |
| 5039091 |
Asexual Spore |
Graphium-type spores, also know as coremia or synnema, in gallery |
Joseph O'Brien |
| 1455146 |
Control |
Girdling cut made upon detection to prevent root graft transmission |
Whitney Cranshaw |
| 3036044 |
Control |
Accumulated wood in firewood cut area DED Atlanta |
Robert L. Anderson |
| 5359732 |
Culture |
Dutch elm disease fungus (described here as Ceratocystis ulmi) growing in a petri dish in the laboratory. |
Lester E. Dickens |
| 5359733 |
Culture |
Dutch elm disease fungus (described here as Ceratocystis ulmi) growing in a petri dish in the laboratory. |
Lester E. Dickens |
| 5359734 |
Damage |
Portion of an elm tree suffering from Dutch Elm Disease, with bark beetle galleries underneath the bark. |
William M. Brown Jr. |
| 5357466 |
Damage |
Elm tree aflicted with Dutch elm disease (Ophiostoma ulmi). |
George Hudler |
| 1458055 |
Feature(s) |
streaking of vascular tissue |
North Carolina Forest Service Archive |
| 5366740 |
Fruiting Bodies |
Very close-up view of the coremia (asexual fruiting structures) of Dutch elm disease (Ophiostoma ulmi). |
William Jacobi |
| 4822041 |
Infestation |
trees killed along road in Vermont, USA |
Edward L. Barnard |
| 1400174 |
Management |
American elm tree removal |
Linda Haugen |
| 5368708 |
Sign |
Characteristic asexual stage or "synnemata", conidiophores with clusters of colorless conidia at the top. |
Paul Bachi |
| 5368586 |
Sign |
Characteristic asexual stage or "synnemata", conidiophores protruding from the end of an infected branch. |
Paul Bachi |
| 5368587 |
Sign |
Characteristic asexual stage or "synnemata", conidiophores protruding from the end of an infected branch. |
Paul Bachi |
| 5368588 |
Sign |
Characteristic asexual stage or "synnemata", conidiophores protruding from the end of an infected branch. |
Paul Bachi |
| 5368589 |
Sign |
Characteristic asexual stage or "synnemata", conidiophores protruding from the end of an infected branch. |
Paul Bachi |
| 5359735 |
Sign |
Portion of elm wood afflicted with Dutch elm disease showing galleries created by the European elm bark beetle, which vectors the disease. |
William M. Brown Jr. |
| 1301078 |
Sign |
Coremia (spore-bearing bodies) of Ophiostoma ulmi in a Scolytus multistriatus gallery |
Joseph O'Brien |
| 5368710 |
Sign |
Tree limbs and leaves shown symptoms of dieback. |
Paul Bachi |
| 5383056 |
Symptoms |
|
Fabio Stergulc |
| 1388032 |
Symptoms |
Flagging branches throughout the crown. Westerville, Ohio. |
Steven Katovich |
| 1396136 |
Symptoms |
|
USDA Forest Service - Northeastern Area Archive |
| 1396138 |
Symptoms |
Wildcat Mountain Park |
USDA Forest Service - Northeastern Area Archive |
| 1396139 |
Symptoms |
|
USDA Forest Service - Northeastern Area Archive |
| 1396140 |
Symptoms |
Wildcat Mountain Park |
USDA Forest Service - Northeastern Area Archive |
| 1398052 |
Symptoms |
|
USDA Forest Service - Northeastern Area Archive |
| 1398053 |
Symptoms |
Advanced crown symptoms. Westerville, Ohio |
Steven Katovich |
| 1400152 |
Symptoms |
|
Linda Haugen |
| 1400153 |
Symptoms |
Dying elm, marked for removal. July. Minnesota. |
Linda Haugen |
| 0176077 |
Symptoms |
Elm shoots variously attacked by Dutch elm disease (Ophiostoma ulmi); note yellowing and browning of foliage and formation of crozier-like hooks at twig ends. |
UK Forestry Commission Archive |
| 0355036 |
Symptoms |
advanced symptoms on American elm |
Robert L. Anderson |
| 0454016 |
Symptoms |
Elm tree severely attacked by Ophiostoma ulmi in late summer, showing a range of foliar symptoms. |
UK Forestry Commission Archive |
| 0454017 |
Symptoms |
Cross section of an Ophiostoma ulmi-infected elm branch, showing characteristic dark spots in the wood. |
UK Forestry Commission Archive |
| 0488108 |
Symptoms |
|
John H. Ghent |
| 0534066 |
Symptoms |
|
Petr Kapitola |
| 1247039 |
Symptoms |
Covington, GA. 1978. |
Terry Price |
| 1247182 |
Symptoms |
|
Terry Price |
| 1301073 |
Symptoms |
Early wilt symptoms |
Joseph O'Brien |
| 1301074 |
Symptoms |
Large specimen elm tree killed |
Joseph O'Brien |
| 1301076 |
Symptoms |
Crown symptoms of Dutch elm disease on a large street tree. |
Joseph O'Brien |
| 1501032 |
Symptoms |
Dutch elm disease, vascular streak |
Paul H. Peacher |
| 1501033 |
Symptoms |
Dutch elm disease, Natchez Trace Pkwy. |
Paul H. Peacher |
| 2110077 |
Symptoms |
late-stage crown symptoms; May 1999 |
Petr Kapitola |
| 2110078 |
Symptoms |
dead trees with sprouts; July 1999 |
Petr Kapitola |
| 2110079 |
Symptoms |
branch symptoms; July 1999 |
Petr Kapitola |
| 2110080 |
Symptoms |
branch symptoms |
Frantisek Soukup |
| 2111018 |
Symptoms |
"branch symptoms (in the foreground)
and killed trees (in the background); July 1999" |
Petr Kapitola |
| 2111019 |
Symptoms |
vascular staining in the wood of an affected branch; 1996 |
Petr Kapitola |
| 2251098 |
Symptoms |
crown symptoms |
USDA Forest Service Archive |
| 2252001 |
Symptoms |
vascular discoloration in winged elm |
USDA Forest Service Archive |
| 2252006 |
Symptoms |
sapwood stain |
Jane Taylor |
| 2252007 |
Symptoms |
branch dieback |
Jane Taylor |
| 2733033 |
Symptoms |
Initial flagging (yellowing) of branches in crown. |
Edward L. Barnard |
| 2733034 |
Symptoms |
small stem split to show vascular discoloration. |
Edward L. Barnard |
| 3227027 |
Symptoms |
in winged elm |
R. Scott Cameron |
| 3227028 |
Symptoms |
with bark peeled showing cambuim streaking |
R. Scott Cameron |
| 3227029 |
Symptoms |
cut stems showing staining |
R. Scott Cameron |
| 4213093 |
Symptoms |
dead and dying trees |
Minnesota Department of Natural Resources Archive |
| 4213094 |
Symptoms |
close-up view of wilting leaves |
Minnesota Department of Natural Resources Archive |
| 4213095 |
Symptoms |
old infection center |
Minnesota Department of Natural Resources Archive |
| 4213096 |
Symptoms |
wilt symptoms |
Minnesota Department of Natural Resources Archive |
| 4215047 |
Symptoms |
vascular staining |
Fred Baker |
| 4215048 |
Symptoms |
early wilt symptoms |
Fred Baker |
| 4554043 |
Symptoms |
|
Petr Kapitola |
| 4822040 |
Symptoms |
Foliage wilting, flagging (yellow), defoliation, and crown dieback |
Edward L. Barnard |
| 5366738 |
Symptoms |
Flagging of foliage in an elm tree afflicted with Dutch elm disease (Ophiostoma ulmi). |
William Jacobi |
| 5366739 |
Symptoms |
Elm tree afflicted with Dutch elm disease (Ophiostoma ulmi). |
William Jacobi |
| 5357037 |
Symptoms |
Elm tree aflicted with Dutch elm disease (described here as Ceratocystis ulmi), Fort Morgan, Colorado, 1970. |
William M. Brown Jr. |
| 5038038 |
Symptoms |
|
Joseph O'Brien |
| 5038044 |
Symptoms |
crown symptoms |
Joseph O'Brien |
| 5368707 |
Symptoms |
Characteristic asexual stage or "synnemata", conidiophores with clusters of colorless conidia at the top. |
Paul Bachi |
| 5366741 |
Symptoms |
Discoloration of elm wood due to the presence of Dutch elm disease (Ophiostoma ulmi). |
William Jacobi |
| 1407052 |
Symptoms |
Like all living things, trees eventually die and decay, victims of many living and manmade agents. The agent here is Dutch elm disease. To ward off this widespread infection, keep elm trees well pruned. If they do become infected, cut and destroy the diseased trees as soon as possible. |
USDA Forest Service - Northeastern Area Archive |
| 1442052 |
Symptoms |
Ceratacystid ulmi dying tree Ulmus americana Milliken ,CO7-16-74 |
USDA Forest Service - Rocky Mountain Region Archive |
| 1458054 |
Symptoms |
1999 |
North Carolina Forest Service Archive |
| 5334062 |
Symptoms |
|
Roland J. Stipes |
| 5334064 |
Symptoms |
|
Roland J. Stipes |
| 4912014 |
Symptoms |
|
Petr Kapitola |
| 5029008 |
Symptoms |
Early wilt symptoms of Dutch elm disease. |
Joseph O'Brien |
| 5029009 |
Symptoms |
discoloration in wood; Vascular streaks caused by Ophiostoma ulmi in elm wood. |
Joseph O'Brien |
| 5033075 |
Symptoms |
|
Joseph O'Brien |
| 5033081 |
Symptoms |
crown symptoms |
Joseph O'Brien |
| 5033082 |
Symptoms |
branch symptoms |
Joseph O'Brien |
| 5033083 |
Symptoms |
crown symptoms |
Joseph O'Brien |
| 5033084 |
Symptoms |
crown symptoms |
Joseph O'Brien |
| 5033085 |
Symptoms |
|
Joseph O'Brien |
| 5033086 |
Symptoms |
|
Joseph O'Brien |
| 5368709 |
Testing |
Incubation of symptomatic pieces of elm branches, surface sterilized and placed in an incubation chamber. |
Paul Bachi |
| 5334066 |
Treatment |
Dutch Elm Disease Treatment, Penn. State Campus |
Mary Ann Hansen |
| 5037070 |
Tree(s) |
American elm killed by Dutch elm disease |
Joseph O'Brien |
