| 0176074 |
citrus greening |
Candidatus Liberibacter asiaticus |
Nymph and adult stages of the two vectors of greening: Diaphorina citri and Trioza erytreae. Citrus greening can be caused by two species: L. asiaticum and L. africanum. |
| 0176025 |
Squash Mosaic Virus |
Comovirus SqMV |
Symptoms on a melon seedling following seed transmission. |
| 0660023 |
bacterial blight |
Xanthomonas arboricola pv. corylina |
On a layered hazel shoot in the process of rooting, dieback after necrosis of a new lateral shoot, due to Xanthomonas campestris pv. corylina. |
| 0660024 |
bacterial blight |
Xanthomonas arboricola pv. corylina |
In orchard, on a 3-year-old hazel tree, dieback of several 1- and 2-year-old shoots starting from localized necrosis on buds or new lateral shoots, due to Xanthomonas campestris pv. corylina |
| 0176033 |
black rot |
Guignardia bidwellii |
Section through pycnidium in a mummified grapevine berry (diameter 80-100 µm) containing numerous conidia, in summer. |
| 0656033 |
Tomato Spotted Wilt Virus |
Tospovirus TSWV |
Tomato fruit infected by tomato spotted wilt tospovirus, with large paler areas. |
| 0656035 |
Tomato Spotted Wilt Virus |
Tospovirus TSWV |
Coalesced paler ring spots with necrotic border induced by tomato spotted wilt tospovirus on mature fruit of capsicum. |
| 0656077 |
citrus greening |
Candidatus Liberibacter asiaticus |
Citrus greening bacterium: brown necrotic or aborted seeds in infected mandarin. |
| 0176030 |
black rot |
Guignardia bidwellii |
Symptoms on grapevine bunches: mummification of infected berries. |
| 0454060 |
Chrysanthemum Stunt Viroid |
Pospiviroid CSVd |
Chrysanthemum stunt viroid infection of chrysanthemum cv. Soleil d'Armor (Sport de Sirocco) showing later stages of symptom development. |
| 0454024 |
white ear rot and seedling blight of maize |
Stenocarpella maydis |
Stalk rot symptoms of maize caused by Sternocarpella maydis. |
| 0454028 |
bean angular leaf spot |
Phaeoisariopsis griseola |
Lower surface of Phaseolus vulgaris leaflet severely infected by Phaeoisariopsis griseola showing coalescence of lesions. |
| 0656076 |
citrus greening |
Candidatus Liberibacter asiaticus |
Leaf mottle on grapefruit, a characteristic symptom caused by citrus greening bacterium but also seen on trees infected by Spiroplasma citri. |
| 0656075 |
citrus greening |
Candidatus Liberibacter asiaticus |
Greening-affected sweet orange showing yellow shoot symptoms. |
| 0176031 |
black rot |
Guignardia bidwellii |
Detail of grapevine berries infected by Guignardia bidwellii: browning, bluing and desiccation of berries; presence of numerous black dots (pycnidia or young perithecia). |
| 0454027 |
Anthracnose, pink boll rot or seedling blight of cotton |
Colletotrichum gossypii |
Immature cotton boll infected by Glomerella gossypii, showing round, sunken lesions. |
| 0176093 |
apricot chlorotic leafroll |
Phytoplasma N/A |
Precocious leaf emergence in apricot in spring, due to European stone fruit yellows phytoplasma. |
| 0656036 |
Tomato Spotted Wilt Virus |
Tospovirus TSWV |
Chlorotic spots on young leaves of gloxinia due to tomato spotted wilt tospovirus. |
| 0454061 |
Chrysanthemum Stunt Viroid |
Pospiviroid CSVd |
Symptoms of chrysanthemum stunt viroid infection on flowers of chrysanthemum cv. Gillglow, showing yellow coloration of petals (on right) compared with the healthy red bloom (on left). |
| 0454029 |
bean angular leaf spot |
Phaeoisariopsis griseola |
Close-up of lower surface of Phaseolus vulgaris lamina infected by Phaeoisariopsis griseola, showing angular lesions delimited by the veins. |
| 0176028 |
black rot |
Guignardia bidwellii |
Symptomson a grapevine leaf: necrotic circular lesions scattered over lamina. |
| 0176092 |
bacterial dieback of peach |
Pseudomonas syringae pv. persicae |
Superficial necrotic spot on young peach fruit. Presence of a gummy mass |
| 0656034 |
Tomato Spotted Wilt Virus |
Tospovirus TSWV |
Chlorotic sinuous lines and concentric rings on leaf of capsicum due to tomato spotted wilt tospovirus. |
| 0454059 |
Chrysanthemum Stunt Viroid |
Pospiviroid CSVd |
Chrysanthemum stunt viroid infection of chrysanthemum cv. Soleil d'Armor showing stunting and earlier blooming of affected plants; healthy plants in middle. |
| 5430469 |
Pseudomonas bacterium |
Pseudomonas savastanoi |
Olive knot cankers on a European ash branch. |
| 5430490 |
Nectria canker |
Nectria spp. |
Nectria canker fungal fruiting bodies on silver maple |
| 0454011 |
bacterial blight |
Pseudomonas savastanoi pv. glycinea |
Symptoms of Pseudomonas syringae pv. glycinea on soybean leaf later in the season, showing necrotic lesions with chlorotic halos. |
| 0656037 |
Tomato Spotted Wilt Virus |
Tospovirus TSWV |
Tomato spotted wilt tospovirus damage on New Guinea impatiens plants (right). |
| 0454010 |
bacterial blight |
Pseudomonas savastanoi pv. glycinea |
Early symptoms of Pseudomonas syringae pv. glycinea on soybean leaflet. |
| 0454021 |
white ear rot and seedling blight of maize |
Stenocarpella maydis |
White ear rot symptoms of maize caused by Stenocarpella maydis. |
| 0176034 |
black rot |
Guignardia bidwellii |
Section through young undifferentiated perithecia in a mummified grapevine berry, in autumn or winter (diameter 80-100 µm). |
| 0176032 |
black rot |
Guignardia bidwellii |
Damage on grapevine shoots: long brown-bordered cankers, more or less sunken, generally carrying fruiting bodies. |
| 0176036 |
black rot |
Guignardia bidwellii |
Pure culture of Guignardia bidwellii on malt agar medium, after 18 d incubation at 20°C, with pycnidia grouped in masses of black sclerotia. |
| 0746054 |
lime witches’ broom phytoplasma |
Candidatus Phytoplasma aurantifolia |
Lime trees (Citrus aurantifolia) affected by lime witches' broom phytoplasma. |
| 0746051 |
stubborn, little leaf |
Spiroplasma citri |
Sweet orange tree infected by Spiroplasma citri (left), causal agent of stubborn, showing stunting as compared to the healthy tree (right). Note the rounded shape of the infected tree. |
| 0746052 |
stubborn, little leaf |
Spiroplasma citri |
Lobsided fruit from a sweet orange tree infected by Spiroplasma citri. Thickening of the albedo at the peduncular end can be observed while the albedo at the stylar end is very thin. |
| 0746031 |
lime witches’ broom phytoplasma |
Candidatus Phytoplasma aurantifolia |
Close up of a witches' broom on a lime tree (Citrus aurantifolia) affected by lime witches' broom phytoplasma. |
| 0746032 |
lime witches’ broom phytoplasma |
Candidatus Phytoplasma aurantifolia |
Lime shoot from a healthy tree (right); shoots from a tree affected by lime witches' broom phytoplasma; from right to left: shoots with early symptoms (leaves are still large), witches' broom before and after leaf drying. |
| 0746033 |
stubborn, little leaf |
Spiroplasma citri |
Sweet orange tree infected by Spiroplasma citri. Note rosettes of cup-shaped leaves and the presence of off season flowers and fruit at all stages of maturation. |
| 0746034 |
stubborn, little leaf |
Spiroplasma citri |
Normal seeds from a healthy fruit (upper row); partially aborted seeds from a Spiroplasma citri infected fruit (lower row). |
| 0746027 |
lime witches’ broom phytoplasma |
Candidatus Phytoplasma aurantifolia |
Lime trees (Citrus aurantifolia) affected by lime witches' broom phytoplasma. |
| 0746001 |
chrysanthemum white rust |
Puccinia horiana |
Symptoms of Puccinia horiana on chrysanthemum. |
| 0725027 |
Peach X-disease |
Phytoplasma N/A |
Dieback and partial yellowing of a peach tree affected by peach X disease phytoplasma. |
| 0725028 |
Peach X-disease |
Phytoplasma N/A |
Symptoms of peach X disease phytoplasma on peach by artificial transmission. Note the rolled leaves, swollen veins and yellowing. |
| 0725024 |
potato stolbur phytoplasma |
Phytoplasma SMLO |
Symptoms of potato stolbur phytoplasma on potato. Note the presence of aerial tubers. |
| 0725025 |
Peach X-disease |
Phytoplasma N/A |
Cherry tree affected by peach X disease phytoplasma. Note the small fruit with shorten peduncles, small leaves and dieback of the tree. |
| 0725026 |
Peach X-disease |
Phytoplasma N/A |
Cherry tree affected by peach X disease phytoplasma. Note the heteroginous maturity and dieback of the tree. |
| 0725023 |
Hypoxylon canker of aspen |
Entoleuca mammata |
Canker of Populus tremula caused by Hypoxylon mammatum. |
| 0725008 |
chrysanthemum white rust |
Puccinia horiana |
Symptoms of Puccinia horiana on chrysanthemum. |
| 0725009 |
downy mildew |
Plasmopara halstedii |
Green and chlorotic mottling along the main veins due to Plasmopara halstedii on sunflower. |
| 0725010 |
bacterial wilt |
Burkholderia caryophylli |
Stem canker in carnation caused by Burkholderia (Pseudomonas) caryophylli. |
| 0725011 |
Phialophora wilt |
Phialophora cinerescens |
Discoloration of the vascular zone caused by Phialophora cinerescens on a carnation stem. Healthy stem (left), affected stem (right). |
| 0725007 |
bacterial wilt |
Curtobacterium flaccumfaciens pv. flaccumfaciens |
Leaf symptoms of Curtobacterium flaccumfaciens pv. flaccumfaciens on French beans (Phaseolus vulgaris). |
| 0660100 |
Bayoudh disease |
Fusarium oxysporum f.sp. albedinis |
Yellowing and wilting of date palm crown caused by Fusarium oxysporum f.sp. albedinis. |
| 0660095 |
ring rot of potato |
Clavibacter michiganensis ssp. sepedonicus |
Positive eggplant test for bacterial ringrot due to Clavibacter michiganensis subsp. sepedonicus |
| 0660094 |
Tomato Ringspot Virus |
Nepovirus ToRSV |
Abnormalities of the graft union and stem pitting in peach, due to tomato ringspot nepovirus. Black and white image |
| 0660078 |
Plum Pox Virus |
Potyvirus PPV |
Plum pox potyvirus: spots on apricot stones. |
| 0660072 |
Plum Pox Virus |
Potyvirus PPV |
Plum pox potyvirus: yellow rings on a yellow-fleshed peach cultivar. |
| 0660073 |
Potato Spindle Tuber Viroid |
Pospiviroid PSTVd |
Potato spindle tuber viroid: reduced size and yield of potato tubers (healthy tubers on right). |
| 0660074 |
Beet Necrotic Yellow Vein Virus |
Benyvirus BNYVV |
Beet necrotic yellow vein furovirus: abnormal root development (rhizomania) in beet. |
| 0660052 |
Beet Necrotic Yellow Vein Virus |
Benyvirus BNYVV |
Systemic symptoms of beet necrotic yellow vein furovirus infection on sugar beet leaves. |
| 0660054 |
bacterial leaf scorch |
Xylella fastidiosa |
Yellowing and desiccation of grapevine leaves, and wilting of bunches, due to Xylella fastidiosa in the Napa Valley, California (US) |
| 0660055 |
bacterial leaf scorch |
Xylella fastidiosa |
Uneven ripening of grapevine shoots, a very characteristic symptom of Pierce's disease, due to Xylella fastidiosa |
| 0660051 |
Beet Necrotic Yellow Vein Virus |
Benyvirus BNYVV |
Longitudinal section of sugar beet root infected by beet necrotic yellow vein furovirus, showing browning of the vascular tissues. |
| 0660038 |
apricot chlorotic leafroll |
Phytoplasma N/A |
Browning and necrosis of the middle layer of apricot bark (phloem) after a severe winter, due to apricot chlorotic leafroll phytoplasma. |
| 0660039 |
apricot chlorotic leafroll |
Phytoplasma N/A |
Characteristic leafroll symptoms on apricot, due to apricot chlorotic leafroll phytoplasma. |
| 0660036 |
bacterial dieback of peach |
Pseudomonas syringae pv. persicae |
Typical necrosis, due to Pseudomonas syringae pv. persicae, developing in early winter around dormant buds on young peach shoots |
| 0660037 |
bacterial dieback of peach |
Pseudomonas syringae pv. persicae |
Leaf spots on peach in spring, due to Pseudomonas syringae pv. persicae. |
| 0660027 |
Ceratocystis canker - stain of sycamore |
Ceratocystis fimbriata f.sp. platani |
Section of infected plane branch, showing dark streaks due to Ceratocystis fimbriata f.sp. platani. |
| 0660028 |
Ceratocystis canker - stain of sycamore |
Ceratocystis fimbriata f.sp. platani |
Plane tree showing advanced dieback after 2-3 years, after infection by Ceratocystis fimbriata f.sp. platani. |
| 0660029 |
Ceratocystis canker - stain of sycamore |
Ceratocystis fimbriata f.sp. platani |
Invasion of plane wood by Ceratocystis fimbriata f. sp. platani. |
| 0177012 |
Chrysanthemum Stunt Viroid |
Pospiviroid CSVd |
Chrysanthemum stunt viroid; :flower breaking and deformation in chrysanthemum (healthy flower on left). |
| 0177046 |
Bayoudh disease |
Fusarium oxysporum f.sp. albedinis |
Cross section of data palm trunk |
| 0177049 |
hemlock rust |
Melampsora farlowii |
Binucleate teliospores |
| 0177050 |
hemlock rust |
Melampsora farlowii |
Uninucleate teliospores |
| 0177004 |
Beet Necrotic Yellow Vein Virus |
Benyvirus BNYVV |
Characteristic rootlet proliferation, or rhizomania, due to beet necrotic yellow vein furovirus in sugar beet. |
| 0176029 |
black rot |
Guignardia bidwellii |
Detail of leaf lesions on grapevine: note dark border and numerous black dots (pycnidia). |
| 0176035 |
black rot |
Guignardia bidwellii |
Section through perithecium in a mummified grapevine berry in spring (diameter 80-100 µm), containing numerous asci. |
