| 5492323 |
leaf spot of maize |
Bipolaris zeicola |
NCLS spores developing from a lesion on a leaf |
| 5492322 |
Rhizosphaera needle cast |
Rhizosphaera spp. |
Fruiting bodies developing from stomates on a spruce needle |
| 5492318 |
early blight |
Alternaria solani |
External and internal view of Early Blight lesions; note symptoms within this tuber are shallow. |
| 5492319 |
early blight |
Alternaria solani |
Large lesion on tuber infected with Early Blight pathogen Alternaria solani |
| 5492320 |
early blight |
Alternaria solani |
Shallow symptoms in potato tuber flesh where skin cut away from lesion of tuber infected with Alternaria solani |
| 5492313 |
rust |
Pucciniastrum americanum |
Rust pustules developing on yellow raspberry fruit |
| 5492303 |
early blight |
Alternaria solani |
Four Alternaria solani isolates growing on acidified potato dextrose agar (APDA) and showing colony variation and yellow pigmentation of the agar. |
| 5492304 |
mycelial neck rot |
Botrytis tulipae |
Rough yellow lesions on surface of an infected bulb |
| 5492336 |
Rhizosphaera needle cast |
Rhizosphaera spp. |
Rhizosphaera pycnidia on spruce |
| 5492338 |
Rhizosphaera needle cast |
Rhizosphaera spp. |
Close-up view of Rhizosphaera fruiting bodies developing from stomates on a spruce needle. White caps of wax and colorless masses of spores visible on top of pycnidia. |
| 5492305 |
mycelial neck rot |
Botrytis tulipae |
Dark fungal sclerotia on roots of infected (potted) plants |
| 5492306 |
mycelial neck rot |
Botrytis tulipae |
Closer view of dark fungal sclerotia on roots of infected (potted) plants. |
| 5484085 |
brown spot needle blight of pine |
Mycosphaerella dearnessii |
Fruiting bodies on Easter white pine needle. |
| 5484086 |
brown spot needle blight of pine |
Mycosphaerella dearnessii |
Olive brown spores. |
| 5484087 |
rust |
Pucciniastrum americanum |
A rust pustule on raspberry fruit with spores. |
| 5484090 |
late blight |
Phytophthora infestans |
Late blight symptom, leaf spot, view of upper and lower leaf surfaces. |
| 5484091 |
late blight |
Phytophthora infestans |
late blight symptom on green fruit surface |
| 5484092 |
late blight |
Phytophthora infestans |
Late blight internal symptom in green fruit |
| 5492339 |
Stigmina leaf spot |
Stigmina lautii |
dark fruiting bodies developing from stomates on a blue spruce needle |
| 5492337 |
Rhizosphaera needle cast |
Rhizosphaera spp. |
Pycnidia of a Rhizosphaera sp. on a spruce needle. |
| 5492321 |
late blight |
Phytophthora infestans |
Cut surface exposing internal symptoms of tuber infected with Phytophthora infestans |
| 5458673 |
Alternaria black molds / stem cankers |
Alternaria spp. |
Alternaria leaf spot. |
| 5458674 |
Alternaria black molds / stem cankers |
Alternaria spp. |
Alternaria leaf spot. |
| 5461615 |
puccinia rusts |
Puccinia spp. |
rust on buckthorn |
| 5461613 |
anthracnose |
Colletotrichum spp. |
hyphopodia |
| 5458656 |
spruce needle rust |
Chrysomyxa weirii |
Individual Chrysomyxa weirii rust pustule swelling and splitting open on a blue spruce needle. |
| 5458599 |
Ploioderma needle cast of pine |
Ploioderma lethale |
Ploioderma needlecast fruiting structure in mid-June in upstate New York. |
| 5457957 |
late blight |
Phytophthora infestans |
Sporangia of Phytophthora infestans. |
| 5457968 |
late blight |
Phytophthora infestans |
Sporangia of Phytophthora infestans. |
| 5458655 |
spruce needle rust |
Chrysomyxa weirii |
Chrysomyxa weirii spores |
| 5457969 |
maple cankers |
Stegonsporium spp. |
Dark fruiting bodies emerging from blighted maple twig |
| 5458657 |
spruce needle rust |
Chrysomyxa weirii |
Immature Chrysomyxa weirii rust pustules on blue spruce needles. Note slight swellings where fruiting bodies are developing within yellow-orange spots on needles. |
| 5458658 |
spruce needle rust |
Chrysomyxa weirii |
Immature Chrysomyxa weirii rust pustules on blue spruce needles. Note slight swellings where fruiting bodies are developing within yellow-orange spots on needles. |
| 5458659 |
spruce needle rust |
Chrysomyxa weirii |
Chrysomyxa weirii rust pustules on blue spruce needles showing the release of masses of infectious spores. |
| 5458665 |
Ploioderma needle cast of pine |
Ploioderma lethale |
Eight mature ascospores |
| 5457972 |
maple cankers |
Stegonsporium spp. |
dark spores |
| 5457973 |
maple cankers |
Stegonsporium spp. |
fruiting body with mature spores |
| 5458688 |
Stigmina leaf spot |
Stigmina lautii |
|
| 5458686 |
downy mildew |
Peronospora sparsa |
Sporangia. |
| 5458685 |
downy mildew |
Peronospora sparsa |
Sporangia. |
| 5458681 |
Impatiens Necrotic Spot Virus |
Tospovirus INSV |
Foliar symptoms. |
| 5458682 |
orange rust |
Arthuriomyces peckianus |
Black raspberry infected with the Orange Rust fungus Arthuriomyces peckianus and exhibiting numerous bright orange pustules developing on the undersides of leaves. |
| 5458683 |
orange rust |
Arthuriomyces peckianus |
Black raspberry infected with the Orange Rust fungus Arthuriomyces peckianus and exhibiting numerous bright orange pustules developing on the undersides of leaves. |
| 5458088 |
mycelial neck rot |
Botrytis tulipae |
Dark fungal sclerotia developing on roots might be mistaken for clumps of media. |
| 5458715 |
downy mildew |
Plasmopara viburni |
Lesions on the underside of a leaf. Note how many individual lesions appear angular as lesions develop between small leaf veins. |
| 5458716 |
downy mildew |
Plasmopara viburni |
Close view of adjacent lesions on the underside of a leaf. Sparser white growth is the least mature. |
| 5458712 |
downy mildew |
Plasmopara viburni |
Close-up view of lesions on the underside of a leaf. |
| 5458713 |
downy mildew |
Plasmopara viburni |
Fruiting bodies developing along a vein on the underside of the leaf. |
| 5458714 |
downy mildew |
Plasmopara viburni |
Lesions on the upper surface of a leaf. |
| 5458711 |
downy mildew |
Plasmopara viburni |
Lesions on the underside of a leaf. |
| 5458079 |
basil downy mildew |
Peronospora belbahrii |
sporangia |
| 5458086 |
basil downy mildew |
Peronospora belbahrii |
Masses of purplish sporangia on the undersurface of a leaf. |
| 5458087 |
basil downy mildew |
Peronospora belbahrii |
Masses of purplish sporangia on the undersurface of a leaf. |
| 5458376 |
rust |
Puccinia pelargonii-zonalis |
Lesions on underside of leaf, close view |
| 5458377 |
rust |
Puccinia pelargonii-zonalis |
a single teliospore |
| 5458378 |
rust |
Puccinia pelargonii-zonalis |
Urediniospores |
| 5458379 |
rust |
Puccinia pelargonii-zonalis |
Close view of one lesion on the underside of an infected leaf. Note the pustules breaking open in the center where spores are being liberated. |
| 5458380 |
rust |
Puccinia pelargonii-zonalis |
Urediniospores and Teliospores. |
| 5458381 |
rust |
Puccinia pelargonii-zonalis |
Numerous urediniospores with a few two celled teliospores also visible. |
| 5458382 |
rust |
Puccinia pelargonii-zonalis |
Foliar lesions as viewed on underside of infected leaf. |
| 5458091 |
basil downy mildew |
Peronospora belbahrii |
Heavy spore production on the undersurface of the leaf may look like dust or dirt on the tissue. |
| 5458092 |
basil downy mildew |
Peronospora belbahrii |
A closer view of a lesion with dense sporulation that looks like a grayish-purple mold on the leaf. |
| 5458383 |
rust |
Puccinia pelargonii-zonalis |
Numerous foliar lesions as viewed on underside of infected leaf. |
| 5458384 |
rust |
Puccinia pelargonii-zonalis |
Underside of severely infected geranium leaf. Note the lesion on the petiole. |
| 5458385 |
rust |
Puccinia pelargonii-zonalis |
Upper surface of severely infected geranium leaf. Note the lesion on the petiole. |
| 5458386 |
rust |
Puccinia pelargonii-zonalis |
A single lesion on the underside of an infected leaf. This lesion looks like a happy face. |
| 5457975 |
anthracnose |
Colletotrichum spp. |
Colletotrichum acervuli with setae developing on butternut squash. |
| 5458353 |
downy spot |
Microstroma juglandis |
The fungus sporulates on lower leaf surfaces in a dense white mat of fungal tissue. |
| 5458596 |
juniper-pear rust |
Gymnosporangium sabinae |
Orangish lesion on the upperside of a pear leaf. |
| 5458603 |
Rhabdocline needlecast |
Rhabdocline weirii |
The fruiting bodies rupture the needle epidermis in spring exposing the spore bearing areas. |
| 5458636 |
Rhabdocline needlecast |
Rhabdocline weirii |
Rhabdocline apothecia are released when flaps of leaf epidermis fold back on either side of the midrib. |
| 5458080 |
basil downy mildew |
Peronospora belbahrii |
Sporangia |
| 5458090 |
mycelial neck rot |
Botrytis tulipae |
general view of symptomatic plant showing decay of bulb |
| 5458337 |
tar spot of maple |
Rhytisma acerinum |
Black tar-like fruiting structures on the upper side of leaves are diagnostic signs of giant tar spot. |
| 5458089 |
mycelial neck rot |
Botrytis tulipae |
Symptoms of Botrytis tulipae, Tulip Fire, on leaves and petioles. |
| 5458101 |
mycelial neck rot |
Botrytis tulipae |
Infected bulb exhibiting rot with dark sclerotia developing on surface. |
| 5458103 |
mycelial neck rot |
Botrytis tulipae |
Black sclerotia and gray mycelium and spores developing on roots of infected plants. |
| 5458104 |
mycelial neck rot |
Botrytis tulipae |
Dieback of leaf tips and neck rot, with dark fungal sclerotia present on rotted tissue of the bulb. |
| 5458105 |
mycelial neck rot |
Botrytis tulipae |
Dark sclerotia developing on an infected bulb. |
| 5458093 |
mycelial neck rot |
Botrytis tulipae |
Tulip Fire: foliar symptoms caused by Botrytis tulipae. |
| 5458066 |
chrysanthemum white rust |
Puccinia horiana |
Chrysanthemum white rust pustules on the lower surface of the leaf. |
| 5458067 |
chrysanthemum white rust |
Puccinia horiana |
Chrysanthemum white rust pustules on the lower surface of the leaf. |
| 5458068 |
chrysanthemum white rust |
Puccinia horiana |
Chrysanthemum white rust pustules on the lower surface of the leaf. |
| 5458069 |
chrysanthemum white rust |
Puccinia horiana |
Chrysanthemum white rust pustules on stems of chrysanthemum sp. |
| 1949049 |
Potato Yellow Dwarf Virus |
Nucleorhabdovirus PYDV |
Potato yellow dwarf rhabdovirus infection showing severe cracking and malformation of potato tubers. |
| 1949048 |
Potato Yellow Dwarf Virus |
Nucleorhabdovirus PYDV |
Later symptoms of potato yellow dwarf rhabdovirus infection in potato showing dwarfing and apical yellowing as it often appears in the field. |
| 1949050 |
Potato Yellow Dwarf Virus |
Nucleorhabdovirus PYDV |
Potato yellow dwarf rhabdovirus infection showing severe internal necrosis, cracking and malformation of potato tubers. |
