| 5472312 |
walnut scale |
Diaspidiotus juglansregiae |
|
| 5454691 |
dieback |
|
Urban tree decline. |
| 1580564 |
Botryosphaeria rots and cankers |
Botryosphaeria spp. |
bot canker |
| 1580565 |
Botryosphaeria rots and cankers |
Botryosphaeria spp. |
bot canker |
| 1580569 |
Botryosphaeria rots and cankers |
Botryosphaeria spp. |
bot canker |
| 5458364 |
leaf blister |
Taphrina spp. |
Leaf cross-section with asci on surface |
| 5458366 |
leaf blister |
Taphrina spp. |
Leaf cross-section with asci on surface. |
| 5458361 |
leaf blister |
Taphrina spp. |
Infected leaves. |
| 5454603 |
decay |
|
Basal decay with girdling roots. |
| 5458362 |
leaf blister |
Taphrina spp. |
Infected leaf |
| 5458363 |
leaf blister |
Taphrina spp. |
Infected leaf. |
| 5458367 |
leaf blister |
Taphrina spp. |
Leaf cross-section with asci on surface. |
| 5458365 |
leaf blister |
Taphrina spp. |
Leaf cross-section with asci on surface |
| 5458356 |
ocellate gall midge |
Acericecis ocellaris |
Eyespot gall on a red maple leaf caused by the larvae of a midge. |
| 1398058 |
galls |
|
caused by mites |
| 1580556 |
Phyllosticta leaf spots |
Phyllosticta spp. |
|
| 1580705 |
iron deficiency |
|
Acer rubrum 'October Glory ™'
|
| 1580706 |
iron deficiency |
|
Acer rubrum 'October Glory ™'
|
| 1580707 |
iron deficiency |
|
Acer rubrum 'October Glory ™'
|
| 1580572 |
greenstriped mapleworm |
Dryocampa rubicunda |
|
| 1580577 |
greenstriped mapleworm |
Dryocampa rubicunda |
|
| 1580578 |
greenstriped mapleworm |
Dryocampa rubicunda |
|
| 1580579 |
greenstriped mapleworm |
Dryocampa rubicunda |
|
| 5110083 |
olive scale |
Parlatoria oleae |
Col. by J.A. Davidson; Date of photograph or collection: 07/1990 |
| 1398057 |
leafhopper |
Typhlocyba albicans |
Stippling damage on leaf in early summer. Hiawatha National Forest, MI |
| 3057090 |
gallmaking maple borer |
Xylotrechus aceris |
adult exit hole over attack site |
| 4822078 |
Phytophthora basal canker |
Phytophthora palmivora |
Droplets of discolored sap exuding from infected bark tissues. |
| 4822082 |
Phytophthora basal canker |
Phytophthora palmivora |
canker initially 30 inches off ground, 6 months later - 11 feet off ground as infection progresses into tree stem and scaffold branches |
| 4822077 |
Phytophthora basal canker |
Phytophthora palmivora |
Basal canker (6 feet off the ground) with dark staining and discoloration of infected bark. Naples, Florida, USA |
| 1198009 |
eye spot |
Phyllosticta minima |
This image shows spots that are more purple than usual. Often the center of the lesion falls out, resulting in the shot-hole symptom that is common with this disease. |
| 1396127 |
leafhopper |
Typhlocyba albicans |
Hiawatha National Forest |
| 3057089 |
gallmaking maple borer |
Xylotrechus aceris |
|
| 5424407 |
bacterial leaf scorch |
Xylella fastidiosa |
Leaves of red maple showing marginal leaf scorch with diffuse yellow border between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5424408 |
bacterial leaf scorch |
Xylella fastidiosa |
Single leaf of red maple showing marginal leaf scorch with diffuse yellow border between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5424409 |
bacterial leaf scorch |
Xylella fastidiosa |
Leaves of red maple showing marginal leaf scorch with distinct bands of discoloration between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5123024 |
walnut scale |
Diaspidiotus juglansregiae |
|
| 5395243 |
maple bladdergall mite |
Vasates quadripedes |
|
| 4822080 |
Phytophthora basal canker |
Phytophthora palmivora |
Distinctive coffee-brown or dark rusty reddish-brown to black discoloration of bark. |
| 4822079 |
Phytophthora basal canker |
Phytophthora palmivora |
zone line between infected vs. uninfected bark |
| 1388033 |
leafhopper |
Typhlocyba albicans |
Michigan's Upper Peninsula |
| 1580064 |
iron deficiency |
|
|
| 1580052 |
flatheaded appletree borer |
Chrysobothris femorata |
|
| 1580054 |
magnesium deficiency |
|
Norflurazon damage |
| 5050081 |
decay |
|
Decay column in red maple. |
| 5051074 |
Eriophyid mite |
|
Eriophyid mites on red maple leaves |
| 5298025 |
decay |
|
Failed decayed branch. |
| 5034082 |
dieback |
|
Small branch dieback in red maple in an urban landscape |
| 5033062 |
cracks or splits |
|
A red maple with a crack resulting from a bad branch union. |
| 5368678 |
Verticillium wilts |
Verticillium spp. |
Shortly after transplanting, potted trees showed poor growth. |
| 5368679 |
Verticillium wilts |
Verticillium spp. |
Top dieback at junction between tissue infected by a secondary fungus and healthy tissue. |
| 5368680 |
Verticillium wilts |
Verticillium spp. |
Bark stripped off top portion of trunk and branches to show dead vascular tissue. |
| 5368681 |
Verticillium wilts |
Verticillium spp. |
Lower portion of trunk with outer tissue stripped off to reveal discolored xylem tissue. |
| 5368682 |
Verticillium wilts |
Verticillium spp. |
Trunk portion near ground level with outer tissue cut away to reveal discolored xylem tissue. |
| 5368684 |
Verticillium wilts |
Verticillium spp. |
Cross and tangential sections of the lower trunk of one of the nursery trees showing characteristic olive green color of Verticillium-infected xylem. |
| 5368685 |
Verticillium wilts |
Verticillium spp. |
Trunk section with outer tissue cut away to reveal characteristic olive green color of Verticillium-infected xylem. |
| 5373640 |
camellia flower blight |
Ciborinia camelliae |
|
| 5373638 |
camellia flower blight |
Ciborinia camelliae |
|
| 5373637 |
camellia flower blight |
Ciborinia camelliae |
|
| 5373634 |
camellia flower blight |
Ciborinia camelliae |
|
| 5373635 |
camellia flower blight |
Ciborinia camelliae |
|
| 5264079 |
camellia flower blight |
Ciborinia camelliae |
|
| 5258066 |
tar spot of maple |
Rhytisma acerinum |
|
| 5031031 |
fall color |
|
|
| 1504059 |
Irpex canker |
Spongipellis pachyodon |
|
| 1484017 |
yellow cap fungi |
Pholiota spp. |
|
| 1484018 |
yellow cap fungi |
Pholiota spp. |
|
| 1484019 |
yellow cap fungi |
Pholiota spp. |
|
| 1484020 |
yellow cap fungi |
Pholiota spp. |
|
| 1238219 |
site selection mistakes |
|
These planted red maples are on the decline since they were planted in full sun. SC. |
| 1397103 |
tree anatomy |
|
Red maple with stable, u-shaped crotch |
| 2167004 |
ocellate gall midge |
Acericecis ocellaris |
|
| 5057080 |
eye spot |
Phyllosticta minima |
|
| 5057082 |
eye spot |
Phyllosticta minima |
|
| 5057083 |
eye spot |
Phyllosticta minima |
|
| 5016001 |
frost and winter injury (general) |
|
frost damage, picture taken in July |
| 5016008 |
snow and ice damage (snow load) |
|
ice encrusted twig, photo taken in February |
| 1398056 |
ocellate gall midge |
Acericecis ocellaris |
Eyespot galls. |
| 1238160 |
snow and ice damage (snow load) |
|
Stem failure due to ice storm 2002. Mauldin, SC. |
| 0016329 |
herbicides (general) |
|
Cut stumps 6-months after treatment with Garlon 4 thinline to cambium layer on cut surface. |
| 0016330 |
herbicides (general) |
|
Red maple stumps 6-months after cutting but without herbicide treatment. Note sprout development. |
| 4822081 |
Phytophthora basal canker |
Phytophthora palmivora |
diagnostic culture from infected tree |
