| 5492330 |
Ploioderma fungi |
Ploioderma spp. |
Appearance of immature fruiting bodies as observed on needles in spring |
| 5492332 |
Ploioderma fungi |
Ploioderma spp. |
Immature Ploioderma fruiting bodies appearing as thin black lines on the needle surface; as fruiting bodies mature and swell, the needle epidermis will split along these lines. |
| 5457956 |
Camarosporium fungi |
Camarosporium spp. |
Spores |
| 5492322 |
Rhizosphaera needle cast |
Rhizosphaera spp. |
Fruiting bodies developing from stomates on a spruce needle |
| 5492323 |
leaf spot of maize |
Bipolaris zeicola |
NCLS spores developing from a lesion on a leaf |
| 5492327 |
Phytophthora blight |
Phytophthora capsici |
Phytophthora capsici infection of ripe zucchini fruit |
| 5492324 |
oak wilt |
Ceratocystis fagacearum |
Dark streaking on wood of oak branch |
| 5492325 |
oak wilt |
Ceratocystis fagacearum |
Endoconidia and conidia of Ceratocystis fagacearum from culture |
| 5492326 |
oak wilt |
Ceratocystis fagacearum |
Appearance of Ceratocystis fagacearum grown on acidified potato dextrose agar (APDA) at 18 degrees C. (at 3-4 weeks) |
| 5492313 |
rust |
Pucciniastrum americanum |
Rust pustules developing on yellow raspberry fruit |
| 5492314 |
Cytospora cankers |
Cytospora spp. |
Cytospora/spruce canker: cross section of Cytospora pycnidial stroma |
| 5492315 |
Cytospora cankers |
Cytospora spp. |
The tip of a pycnidial stroma just visible breaking through the bark on a spruce branch with Cytospora canker |
| 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 |
| 5492317 |
Cytospora cankers |
Cytospora spp. |
yellow tendrils of conidia oozing from pycnidial stromata of a Cytospora sp. developing in an infected spruce branch |
| 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. |
| 5492309 |
Cytospora cankers |
Cytospora spp. |
Tendril of spores (conidia) oozing from pycnidial stroma of a Cytospora sp. |
| 5492312 |
Cytospora cankers |
Cytospora spp. |
Pycnidial stromata of Cytospora sp. showing yellowish spores oozing from fruiting bodies after bark cut away and tissue moistened. |
| 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. |
| 5492341 |
white rot |
Stromatinia cepivora |
small dark sclerotia on garlic |
| 5492307 |
Cytospora cankers |
Cytospora spp. |
Pycnidial stromata of Cytospora exposed in bark of a spruce branch |
| 5492308 |
Cytospora cankers |
Cytospora spp. |
Cross section through a pycnidial stroma in bark of a blue spruce branch |
| 5484087 |
rust |
Pucciniastrum americanum |
A rust pustule on raspberry fruit with spores. |
| 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. |
| 5484088 |
Boxwood blight |
Calonectria pseudonaviculata |
Twigs with view of leaf spots. |
| 5484089 |
Boxwood blight |
Calonectria pseudonaviculata |
Small twigs with view of leaf spots from underside of leaves. |
| 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. |
| 5492331 |
Ploioderma fungi |
Ploioderma spp. |
Appearance of immature fruiting bodies as observed on needles in spring |
| 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 |
| 5492311 |
Cytospora cankers |
Cytospora spp. |
Pycnidial stromata of Cytospora sp. showing yellowish spores oozing from fruiting bodies after bark was cut away and tissue moistened. |
| 5461622 |
|
Uncinula sp. |
Asci with spores |
| 5461624 |
|
Uncinula sp. |
Asci |
| 5461625 |
|
Uncinula sp. |
Asci with spores |
| 5461626 |
|
Uncinula sp. |
cleistothecium with appendages |
| 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 |
| 5492316 |
Cytospora cankers |
Cytospora spp. |
Close up of a pycnidial stroma of Cytospora in cross section |
| 5492310 |
Cytospora cankers |
Cytospora spp. |
Pycnidial stromata exposed when bark cut away from spruce canker |
| 5461627 |
|
Uncinula sp. |
|
| 5458673 |
Alternaria black molds / stem cankers |
Alternaria spp. |
Alternaria leaf spot. |
| 5458679 |
Dermea |
Dermea sp. |
conidia |
| 5458674 |
Alternaria black molds / stem cankers |
Alternaria spp. |
Alternaria leaf spot. |
| 5458664 |
Plectosporium blight |
Plectosporium tabacinum |
diamond shaped lesions on petiole |
| 5458666 |
black root rot |
Thielaviopsis basicola |
Wilting of plant with Black Root Rot. |
| 5457964 |
Dothiostroma fungus |
Dothistroma spp. |
Conidia |
| 5458084 |
Japanese apple rust |
Gymnosporangium yamadae |
|
| 5461615 |
puccinia rusts |
Puccinia spp. |
rust on buckthorn |
| 5461613 |
anthracnose |
Colletotrichum spp. |
hyphopodia |
| 5461612 |
gray molds |
Botrytis spp. |
conidiophores and spores |
| 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. |
| 5461609 |
gray molds |
Botrytis spp. |
Botrytis condidiophores with spores |
| 5457957 |
late blight |
Phytophthora infestans |
Sporangia of Phytophthora infestans. |
| 5457968 |
late blight |
Phytophthora infestans |
Sporangia of Phytophthora infestans. |
| 5458707 |
Japanese apple rust |
Gymnosporangium yamadae |
Aeciospores and peridial cells. |
| 5458708 |
Japanese apple rust |
Gymnosporangium yamadae |
Close view of aeciospores |
| 5458709 |
Japanese apple rust |
Gymnosporangium yamadae |
Aeciospores and peridial cells |
| 5458710 |
Japanese apple rust |
Gymnosporangium yamadae |
Teliospores from gall on juniper |
| 5458680 |
Japanese apple rust |
Gymnosporangium yamadae |
Gall on juniper. |
| 5458655 |
spruce needle rust |
Chrysomyxa weirii |
Chrysomyxa weirii spores |
| 5458663 |
Plectosporium blight |
Plectosporium tabacinum |
Close up of symptoms on fruit. |
| 5458661 |
Plectosporium blight |
Plectosporium tabacinum |
symptoms on upper leaf surface |
| 5457969 |
maple cankers |
Stegonsporium spp. |
Dark fruiting bodies emerging from blighted maple twig |
| 5458705 |
Japanese apple rust |
Gymnosporangium yamadae |
Close-up of surface of gall on Juniper. |
| 5458706 |
Japanese apple rust |
Gymnosporangium yamadae |
Close view of the spore producing surface of a gall. |
| 5458099 |
Boxwood blight |
Cylindrocladium buxicola |
vesicles and spores. |
| 5458085 |
Japanese apple rust |
Gymnosporangium yamadae |
Upper leaf surface |
| 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. |
| 5457974 |
Inonotus cankers |
Inonotus spp. |
View through fungal pores showing setae. Image is a composite of several photos layered together. |
| 5458675 |
Armillaria root rots |
Armillaria spp. |
Dark shoe-string like rhizomorphs (lower left) and mycelial mat/fan (center & upper right) |
| 5458662 |
Plectosporium blight |
Plectosporium tabacinum |
diamond shaped lesions on leaf veins |
| 5458665 |
Ploioderma needle cast of pine |
Ploioderma lethale |
Eight mature ascospores |
| 5458095 |
Boxwood blight |
Cylindrocladium buxicola |
fruiting bodies on leaf surface |
| 5458096 |
Boxwood blight |
Cylindrocladium buxicola |
Dense production of fruiting bodies on leaf surface with vesicles emerging above spore masses. |
| 5457972 |
maple cankers |
Stegonsporium spp. |
dark spores |
| 5457973 |
maple cankers |
Stegonsporium spp. |
fruiting body with mature spores |
| 5458300 |
black stem, stalk rot |
Thielaviopsis spp. |
dark aleuriospores from a holly root |
| 5458676 |
Armillaria root rots |
Armillaria spp. |
A rhizomorph (top) compared to a root of the host plant bottom). |
| 5458667 |
bacterial leaf scorch |
Xylella fastidiosa |
Bacterial Leaf Scorch symptoms on maple leaves. |
| 5458672 |
leaf scorch of shade trees |
Xylella fastidiosa ssp. multiplex |
Bacterial Leaf Scorch symptoms on oak leaves. |
| 5458678 |
Dutch elm disease (novi-ulmi) |
Ophiostoma novo-ulmi |
Synnemata |
| 5458688 |
Stigmina leaf spot |
Stigmina lautii |
|
| 5458668 |
bacterial leaf scorch |
Xylella fastidiosa |
Bacterial Leaf Scorch and Black Spot on an elm leaf. |
| 5458669 |
bacterial leaf scorch |
Xylella fastidiosa |
Bacterial Leaf Scorch symptoms on elm. |
| 5458670 |
bacterial leaf scorch |
Xylella fastidiosa |
Symptoms of Bacterial Leaf Scorch on maple leaves. Note distinct bands between green and brown foliage on some leaves. |
| 5458671 |
bacterial leaf scorch |
Xylella fastidiosa |
Bacterial Leaf Scorch symptoms on maple leaves. |
| 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. |
| 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. |
| 5458088 |
mycelial neck rot |
Botrytis tulipae |
Dark fungal sclerotia developing on roots might be mistaken for clumps of media. |
| 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. |
| 5458301 |
black stem, stalk rot |
Thielaviopsis spp. |
Chalara state showing conidiophores and a few pale single-cell endospores |
| 5458711 |
downy mildew |
Plasmopara viburni |
Lesions on the underside of a leaf. |
| 5457979 |
Inonotus cankers |
Inonotus spp. |
Fruiting body removed from the base of a living tree |
| 5458593 |
Russula mushroom |
Russula spp. |
Russula spp. at Echo Lake-Cathedral Ledge State Park, Bartlett, New Hampshire. |
| 5458594 |
Russula mushroom |
Russula spp. |
Russula spp. at Echo Lake-Cathedral Ledge State Park, Bartlett, New Hampshire. |
| 5458592 |
Russula mushroom |
Russula spp. |
Russula spp. at Echo Lake-Cathedral Ledge State Park, Bartlett, New Hampshire. |
| 5458094 |
Boxwood blight |
Cylindrocladium buxicola |
vesicles of the fungus with diamond shaped tips |
| 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 |
| 5458081 |
Japanese apple rust |
Gymnosporangium yamadae |
Aecia on the underside of a crabapple leaf. |
| 5457980 |
Inonotus cankers |
Inonotus spp. |
Underside of fruiting structure collected from the base of a tree. |
| 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. |
| 5458302 |
black stem, stalk rot |
Thielaviopsis spp. |
dark aleuriospores breaking up into individual chlamydospores |
| 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. |
| 5458597 |
Rimosus decay |
Phellinus robiniae |
Fruiting body on trunk. |
| 5458596 |
juniper-pear rust |
Gymnosporangium sabinae |
Orangish lesion on the upperside of a pear leaf. |
| 5458601 |
quince rust |
Gymnosporangium clavipes |
Cedar-quince rust aecia on hawthorn fruit. |
| 5458602 |
quince rust |
Gymnosporangium clavipes |
|
| 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. |
| 5458100 |
Boxwood blight |
Cylindrocladium buxicola |
Vesicles and cylindrical conidia. |
| 5458080 |
basil downy mildew |
Peronospora belbahrii |
Sporangia |
| 5458047 |
protozoa |
Spongospora subterranea f.sp. subterranea |
Spores balls or cystosori collected from lesions. |
| 5458090 |
mycelial neck rot |
Botrytis tulipae |
general view of symptomatic plant showing decay of bulb |
| 5457978 |
Boxwood blight |
Cylindrocladium buxicola |
Boxwood blight pathogen showing vesicles extending above spore clusters. |
| 5457981 |
Boxwood blight |
Cylindrocladium buxicola |
Conidiophores developing on a leafspot. |
| 5457958 |
brown rots |
Monilinia spp. |
fruiting bodies on leaf tissue |
| 5457959 |
brown rots |
Monilinia spp. |
fruiting bodies on twig |
| 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. |
| 5458358 |
rust |
Puccinia malvacearum |
Hollyhock rust pustules on lower surface of hollyhock leaf. |
| 5458359 |
Insolibasidium fungus |
Insolibasidium deformans |
White bloom of basidia and basidiospores on lower leaf surface. |
| 5458324 |
Thousand Cankers Disease |
Geosmithia morbida |
Thousand cankers disease showing walnut twig beetle galleries and Geosmithia morbida cankers on black walnut. |
| 5458329 |
Thousand Cankers Disease |
Geosmithia morbida |
Thousand cankers disease symptoms of flagging on a mature black walnut. |
| 5458330 |
Thousand Cankers Disease |
Geosmithia morbida |
Thousand cankers disease symptoms on a mature black walnut. |
| 5458331 |
Thousand Cankers Disease |
Geosmithia morbida |
Thousand cankers disease symptoms of flagging on a mature black walnut. |
| 5458332 |
Thousand Cankers Disease |
Geosmithia morbida |
Thousand cankers disease symptoms of flagging on a mature black walnut. |
| 5458333 |
Thousand Cankers Disease |
Geosmithia morbida |
Thousand cankers disease symptoms of advanced decline on a mature black walnut. |
| 5458334 |
Thousand Cankers Disease |
Geosmithia morbida |
Thousand cankers disease symptoms of advanced decline on a mature black walnut. |
| 5458335 |
Thousand Cankers Disease |
Geosmithia morbida |
Thousand cankers disease symptoms of advanced decline on a mature black walnut. |
| 5458350 |
beefsteak fungus |
Fistulina hepatica |
|
| 5458044 |
protozoa |
Spongospora subterranea |
Tuber exhibiting Powdery Scab (Spongospora subterranea) lesions. |
| 5458045 |
protozoa |
Spongospora subterranea |
Powdery Scab (Spongospora subterranea) lesions. |
| 5458046 |
protozoa |
Spongospora subterranea |
Close view of Powdery Scab (Spongospora subterranea) lesions. |
| 5458048 |
protozoa |
Spongospora subterranea |
Cytosori or spore balls of Spongospora subterranea. |
| 5457955 |
bacterial leaf scorch |
Xylella fastidiosa |
Bacterial leaf scorch on Ulmus spp. |
| 5458089 |
mycelial neck rot |
Botrytis tulipae |
Symptoms of Botrytis tulipae, Tulip Fire, on leaves and petioles. |
| 5457963 |
Dutch elm disease (novi-ulmi) |
Ophiostoma novo-ulmi |
Synemmata developing within a wound on an elm branch. |
| 5457966 |
bacterial blight of geranium |
Xanthomonas hortorum pv. pelargonii |
Wilting symptom without characteristic wedge-shaped leaf spots readily apparent. |
| 5457967 |
gummy stem blight (vine decline) |
Didymella bryoniae |
Symptoms developing on fruit post harvest. |
| 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. |
| 5458051 |
quince rust |
Gymnosporangium clavipes |
Gelatinous telial mass oozing out of small branch swelling. |
| 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. |
| 0656059 |
Elm yellows |
Phytoplasma N/A |
Necrotic rootlets on Ulmus americana caused by elm phloem necrosis MLO infection. |
| 0656057 |
Elm yellows |
Phytoplasma N/A |
Early foliar symptoms caused by elm phloem necrosis phytoplasma; healthy (left) and diseased (right) branches, showing epinasty of leaves. |
| 0656058 |
Elm yellows |
Phytoplasma N/A |
Phloem discoloration in Ulmus americana caused by elm phloem necrosis phytoplasma infection; healthy (top) and diseased (bottom). |
| 5357466 |
Dutch elm disease |
Ophiostoma ulmi |
Elm tree aflicted with Dutch elm disease (Ophiostoma ulmi). |
| 1949050 |
Potato Yellow Dwarf Virus |
Nucleorhabdovirus PYDV |
Potato yellow dwarf rhabdovirus infection showing severe internal necrosis, cracking and malformation of potato tubers. |
| 0177045 |
Elm yellows |
Phytoplasma N/A |
Phloem discoloration in Ulmus americana, caused by elm phloem necrosis phytoplasma, close-up |
