John Hartman's Images
Organization: University of KentuckyCountry: United States
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| 69 Images of 32 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 5427744 | slime mold | Stemonitis spp. | Slime mold fruiting on chrysanthemum leaves |
| 5407846 | leaf spot | Ceratobasidium stevensii | Rhizomorphs and sclerotia of Corticium stevensii on apple fruit |
| 5407847 | leaf spot | Ceratobasidium stevensii | Mid-branch blighting of apples leaves due to thread blight |
| 5407848 | leaf spot | Ceratobasidium stevensii | Blighting of leaves on several apple branches due to Corticium stevensii (thread blight) |
| 5407849 | leaf spot | Ceratobasidium stevensii | Close-up of rhizomorphs and sclerotia of Corticium stevensii on apple branch |
| 5407845 | sooty blotch | Gloeodes pomigena | Sooty blotch (Gloeodes promigena) and flyspeck (Schizothirium pomi) on unsprayed fruit |
| 5430469 | Pseudomonas bacterium | Pseudomonas savastanoi | Olive knot cankers on a European ash branch. |
| 5430471 | ash anthracnose | Gnomoniella fraxini | Close-up of ash foliage showing necrosis due to anthracnose. |
| 5424386 | leaf and flower gall | Exobasidium vaccinii | Leaf or flower parts become infected and galls form. |
| 5424387 | leaf and flower gall | Exobasidium vaccinii | Leaf or flower parts become infected and galls form. |
| 5424388 | bacterial leaf scorch | Xylella fastidiosa | Leaves of boxelder with marginal leaf scorch caused by the bacterium, Xylella fastidiosa. |
| 5424397 | bacterial leaf scorch | Xylella fastidiosa | Leaves of common mulberry showing marginal leaf scorch with dark brown and yellow banded border between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5424398 | bacterial leaf scorch | Xylella fastidiosa | Single leaf of common mulberry showing marginal leaf scorch with dark brown and yellow banded border between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5424399 | snow and ice damage (snow load) | Dogwood buds encapsulated in ice in 2003. | |
| 5424400 | snow and ice damage (snow load) | Dogwood buds encapsulated in ice in 2003. | |
| 5430479 | dogwood anthracnose | Discula destructiva | Foliar symptoms of dogwood anthracnose. |
| 5430482 | powdery mildew | Erysiphe pulchra | Powdery mildew fungal growth on the foliage of dogwood leaves and shoot. |
| 5430486 | American hawthorn rust | Gymnosporangium globosum | Yellow spotting on the upper side of hawthorn leaves infected by the cedar-hawthorn rust fungus, Gymnosporangium globosum. |
| 5424401 | snow and ice damage (snow load) | Dogwood trees bent over due to accumulated ice in 2003. | |
| 5424402 | snow and ice damage (snow load) | Holly leaves coated with ice in 2003. | |
| 5424403 | snow and ice damage (snow load) | A large bur oak toppled due to weight of ice in 2003. | |
| 5424404 | snow and ice damage (snow load) | A line of willow oaks coated with ice in 2003. | |
| 5424405 | snow and ice damage (snow load) | A line of willow oaks coated with ice showing extensive limb breakage in 2003. | |
| 5424406 | snow and ice damage (snow load) | A large silver maple toppled onto a house for sale in 2003. | |
| 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. |
| 5424411 | bacterial leaf scorch | Xylella fastidiosa | Leaf of a maple species showing marginal leaf scorch with broad, distinct bands of discoloration between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5424412 | bacterial leaf scorch | Xylella fastidiosa | Leaves of common mulberry with early symptoms of bacterial leaf scorch caused by the bacterium, Xylella fastidiosa. |
| 5424413 | bacterial leaf scorch | Xylella fastidiosa | Leaf of bur oak showing non-continuous band of colors caused by the bacterium, Xylella fastidiosa. |
| 5424414 | bacterial leaf scorch | Xylella fastidiosa | Leaves of English oak show distinct bands of discoloration between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5424415 | bacterial leaf scorch | Xylella fastidiosa | Leaf of pin oak showing distinct bands of discoloration between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5424416 | bacterial leaf scorch | Xylella fastidiosa | Leaf of pin oak showing mostly scorched tissue but for a small area near the base where there are distinct bands of discolored tissue caused by the bacterium, Xylella fastidiosa. |
| 5424417 | bacterial leaf scorch | Xylella fastidiosa | Leaves of pin oak showing varying degrees of scorched and banded tissue caused by the bacterium, Xylella fastidiosa. |
| 5424418 | bacterial leaf scorch | Xylella fastidiosa | Leaves of pin oak showing varying degrees of scorched and bands of colors caused by the bacterium, Xylella fastidiosa. |
| 5430490 | Nectria canker | Nectria spp. | Nectria canker fungal fruiting bodies on silver maple |
| 5430495 | Verticillium wilt | Verticillium dahliae | Vascular streaking in a maple branch infected with Verticillium dahliae. |
| 5430498 | quince rust | Gymnosporangium clavipes | Telial stage of cedar-quince rust on eastern redcedar. |
| 5427735 | Pyracantha scab | Spilocaea pyracanthae | Symptoms and signs of scab on pyracantha fruit |
| 5427738 | black spot | Diplocarpon rosae | Circular black spots with feathery margins and yellowing typical of black spot of rose |
| 5424444 | black spot | Diplocarpon rosae | Leaves with feathery black spots of similar size with surrounding tissue turning yellow/brown. |
| 5424445 | black spot | Diplocarpon rosae | Leaves with feathery black spots of varying size, some with surrounding tissue turning yellow others not. |
| 5424422 | bacterial leaf scorch | Xylella fastidiosa | Leaves of red oak showing scorching and bands of colors caused by the bacterium, Xylella fastidiosa. |
| 5424423 | bacterial leaf scorch | Xylella fastidiosa | 2 leaves of scarlet oak with distinct bands of discoloration between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5424424 | bacterial leaf scorch | Xylella fastidiosa | Leaf of scarlet oak with some banding of colors between scorched and symptomless tissue but barely any yellow band. |
| 5424425 | bacterial leaf scorch | Xylella fastidiosa | Leaves of shingle oak with distinct bands of discoloration between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5424452 | bacterial leaf scorch | Xylella fastidiosa | Single leaf of sweetgum showing distinct bands of discoloration between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5424453 | bacterial leaf scorch | Xylella fastidiosa | Leaves of sycamore with scorch symptoms caused by the bacterium, Xylella fastidiosa. banding of color is not nearly as distinct as with other tree types. |
| 5407866 | bitter rot and anthracnose | Colletotrichum gloeosporioides | Brown, circular, sunken lesion on peach fruit due to the anthracnose fungus |
| 5424433 | bacterial leaf scorch | Xylella fastidiosa | Large oak tree with decline symptoms in the form of branch dieback and browned leaves. |
| 5407853 | orange rust | Gymnoconia nitens | Blackberry shoots infected with orange rust (right) compared to healthy shoots (left). |
| 5407854 | iron deficiency | Close-up of interveinal chlorosis due to iron deficiency | |
| 5407856 | 2,4-D | Foliar distortion due to growth regulator herbide injury | |
| 5407858 | gray mold | Botrytis cinerea | Bunch rot; Berries in grape cluster covered with Botrytis cinerea |
| 5407859 | crown gall | Rhizobium vitis | Crown gall on grape vine |
| 5407861 | downy mildew | Plasmopara viticola | Downy fungal growth on the underside of grape leaves infected with Plasmopara viticoloa |
| 5407870 | fire blight | Erwinia amylovora | Bacteria (Erwinia amylovora) oozing from infected pear leaf |
| 5407871 | gummosis | Gummy exuduate (gummosis) of unknown cause on plum | |
| 5407873 | anthracnose | Elsinoe veneta | Small roundish anthracnose lesions on young raspberry cane |
| 5407875 | yellow rust | Phragmidium rubi-idaei | Pustules of yellow rust (Phragmidium rubi-idaei) on the upperside of raspberry leaves |
| 5407876 | anthracnose | Colletotrichum acutatum | Ripening strawberry fruit showing the firm, sunken lesions typical of anthracnose fruit rot disease caused by Colletotrichum acutatum |
| 5407877 | red stele | Phytophthora fragariae | Strawberry roots showing the reddish brown stele associated with Phytophthora fragariae (red stele disease) |
| 5407852 | Xylaria root rots | Xylaria spp. | Fruiting bodies of Xylaria sp. at the base of a tree |
| 5407833 | blister spot | Pseudomonas syringae pv. papulans | cv Mutsu Mutsu apple fruit with the small, irregular brown spots typical of blister spot |
| 5407834 | blister spot | Pseudomonas syringae pv. papulans | Close-up of Mutsu apple fruit with the small, irregular brown spots typical of blister spot cv Mutsu |
| 5407836 | cedar-apple rust | Gymnosporangium juniperi-virginianae | Cedar gall with emerging telial horns |
| 5407839 | fire blight | Erwinia amylovora | Flower spur blighted by Erwinia amylovora (fire blight) |
| 5407840 | fire blight | Erwinia amylovora | Widespread fire blight dieback symptoms throughout an apple orchard |
| 5407863 | bacterial leaf scorch | Xylella fastidiosa | Brown, irregular "islands" of necrosis on young grape vines infected with Xylella fastidiosa (Pierce's disease) |
