Bruce Watt's Images
Title: Plant DiagnosticianOrganization: University of Maine
Unit: Pest Management
Country: United States
| 135 Images of 35 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 5486046 | maple cankers | Stegonsporium spp. | Acervuli on branch |
| 5486042 | maple cankers | Stegonsporium spp. | Acervuli on branch |
| 5488300 | Sarea fungus | Sarea resinae | Vertical section of apothecium. (secondary invader on resin). |
| 5486074 | Entomosporium leaf spot | Diplocarpon mespili | Acervulus in leaf spot |
| 5486118 | leaf spot | Tubakia dryina | Conidiomal shield (scutellum) viewed from above. Detached conidiophores and conidia at upper left. |
| 5486116 | leaf spot | Tubakia dryina | Partial view of conidiomal shield (scutellum) viewed from above. |
| 5486115 | leaf spot | Tubakia dryina | Conidiomal shield (scutellum) viewed from below. Conidia obvious. |
| 5486076 | Entomosporium leaf spot | Diplocarpon mespili | Vertical section of acervulus with macroconidia and microconidia |
| 5486075 | Entomosporium leaf spot | Diplocarpon mespili | Vertical section of acervulus |
| 5486047 | Prosthecium fungus | Prosthecium pyriforme | Transverse section of acervulus on branch |
| 5488238 | Ploioderma fungi | Ploioderma spp. | Tips of asci surrounded by paraphyses |
| 5486113 | leaf spot | Tubakia dryina | Side view of conidioma (pycnotherium) projecting above leaf. |
| 5486114 | leaf spot | Tubakia dryina | Side view of conidioma (pycnotherium) projecting above leaf. |
| 5488282 | needlecasts | Davisomycella spp. | Mature ascus with spores |
| 5488288 | needlecasts | Davisomycella spp. | Mature ascospore with gelatinous sheath |
| 5488283 | needlecasts | Davisomycella spp. | Mature asci with spores and surrounding paraphyses |
| 5488299 | Sarea fungus | Sarea resinae | Apothecium. (growing secondarily on resin exudate) |
| 5488298 | Sarea fungus | Sarea resinae | Apothecia. (growing secondarily on resin exudate) |
| 5488297 | Sarea fungus | Sarea resinae | Apothecium. (growing secondarily on resin exudate) |
| 5490453 | crown rust | Puccinia coronata | Vertical section of aecium |
| 5488371 | Truncatella fungi | Truncatella spp. | Vertical section of conidioma (Infection secondary to Sphaeropsis) |
| 5488370 | Truncatella fungi | Truncatella spp. | Vertical section of conidioma (Infection secondary to Sphaeropsis) |
| 5488369 | Truncatella fungi | Truncatella spp. | Vertical section of conidioma (Infection secondary to Sphaeropsis) |
| 5485220 | Ojibwaya fungus | Ojibwaya perpulchra | Conidia emerging from conidioma |
| 5488325 | Diplodia blight | Sphaeropsis sapinea | Pycnidia emerging from stem |
| 5488296 | Lophodermium needle casts | Lophodermium spp. | Vertical section of apothecium |
| 5488254 | pine needle rusts | Coleosporium spp. | Vertical section of aecium |
| 5488251 | pine needle rusts | Coleosporium spp. | Aecium on needle |
| 5488255 | pine needle rusts | Coleosporium spp. | Vertical section of aecium |
| 5488257 | pine needle rusts | Coleosporium spp. | Vertical section of aecium |
| 5488202 | powdery mildew | Golovinomyces cichoracearum | Ruptured chasmothecium with multiple asci |
| 5488330 | Diplodia blight | Sphaeropsis sapinea | Vertical section of pycnidium showing conidial production |
| 5488329 | Diplodia blight | Sphaeropsis sapinea | Vertical section of pycnidia |
| 5488328 | Diplodia blight | Sphaeropsis sapinea | Vertical section of pycnidia |
| 5488327 | Diplodia blight | Sphaeropsis sapinea | Pycnidium emerging from stem |
| 5488326 | Diplodia blight | Sphaeropsis sapinea | Pycnidia emerging from stem |
| 5488280 | tar spot needlecast | Davisomycella ampla | Vertical section of hysterothecium with mature asci surrounded by paraphyses |
| 5488278 | tar spot needlecast | Davisomycella ampla | Vertical section of hysterothecium showing asci and paraphyses |
| 5488277 | tar spot needlecast | Davisomycella ampla | Hysterothecia on needle |
| 5488276 | tar spot needlecast | Davisomycella ampla | Hysterothecium on needle |
| 5485018 | anthracnose | Colletotrichum spp. | Vertical section of acervulus showing conidiophores and conidia |
| 5488234 | Ploioderma needle cast of pine | Ploioderma lethale | Vertical section of apothecium |
| 5488231 | Ploioderma needle cast of pine | Ploioderma lethale | Vertical section of apothecium |
| 5488230 | Ploioderma needle cast of pine | Ploioderma lethale | Vertical section of apothecium showing asci and paraphyses |
| 5488229 | Ploioderma needle cast of pine | Ploioderma lethale | Vertical section of apothecia |
| 5488227 | Ploioderma needle cast of pine | Ploioderma lethale | Apothecium |
| 5488248 | Cyclaneusma needle cast | Cyclaneusma minus | Paraphyses with oil droplets |
| 5488245 | Cyclaneusma needle cast | Cyclaneusma minus | Vertical section of apothecium with trapped air bubble |
| 5488244 | Cyclaneusma needle cast | Cyclaneusma minus | Apothecium in needle |
| 5488243 | Cyclaneusma needle cast | Cyclaneusma minus | Apothecium in needle |
| 5486064 | tar spot of maple | Rhytisma acerinum | Apothecia in tar spot with hymenia evident (Spring) |
| 5486063 | tar spot of maple | Rhytisma acerinum | Apothecia in tar spots (Spring) |
| 5486062 | tar spot of maple | Rhytisma acerinum | Apothecia in tar spots (Spring) |
| 5486056 | tar spot of maple | Rhytisma acerinum | Vertical cross-section of apothecium with asci and paraphyses apparent |
| 5486055 | tar spots | Rhytisma spp. | Vertical cross-section of apothecium with ascospores emerging |
| 5486054 | tar spot of maple | Rhytisma acerinum | Vertical cross-section of apothecium with ascospores emerging |
| 5486053 | tar spot of maple | Rhytisma acerinum | Vertical cross-section of apothecium with ascospores emerging |
| 5486052 | tar spot of maple | Rhytisma acerinum | Apothecia in tar spot with hymenia evident (Spring) |
| 5484550 | Phomopsis cankers and twig blights | Phomopsis spp. | Vertical section of pycnidium showing conidiophores.(Secondary to Dutch elm disease) |
| 5484549 | Phomopsis cankers and twig blights | Phomopsis spp. | Vertical section of pycnidium.(Secondary to Dutch elm disease) |
| 5484548 | Phomopsis cankers and twig blights | Phomopsis spp. | Vertical section of pycnidium.(Secondary to Dutch elm disease) |
| 5485632 | anthracnose | Colletotrichum spp. | Acervuli on leaf surface. |
| 5485266 | Monochaetia fungi | Monochaetia spp. | Black acervuli in Taphrina caerulescens lesion. |
| 5485265 | Monochaetia fungi | Monochaetia spp. | Black acervuli in Taphrina caerulescens lesion. |
| 5485212 | Phyllosticta leaf spots | Phyllosticta spp. | Vertical section of pycnidium. |
| 5485243 | Phomopsis cankers and twig blights | Phomopsis spp. | Vertical section of pycnidium with alpha conidia on conidiophores. Beta spores absent. |
| 5485241 | Phomopsis blight | Phomopsis juniperivora | Vertical section of pycnidium with alpha conidia on conidiophores. Beta spores absent. |
| 5485240 | Phomopsis blight | Phomopsis juniperivora | Vertical section of pycnidium. Beta spores absent. |
| 5485239 | Phomopsis blight | Phomopsis juniperivora | Vertical section of pycnidium. Beta spores absent. |
| 5485238 | Phomopsis blight | Phomopsis juniperivora | Vertical section of pycnidium. Beta spores absent. |
| 5485217 | Phyllosticta leaf spots | Phyllosticta spp. | Vertical section of pycnidium. |
| 5485216 | Phyllosticta leaf spots | Phyllosticta spp. | Vertical section of pycnidium. |
| 5485215 | Phyllosticta leaf spots | Phyllosticta spp. | Vertical section of pycnidium. |
| 5485214 | Phyllosticta leaf spots | Phyllosticta spp. | Vertical section of pycnidium. |
| 5485213 | Phyllosticta leaf spots | Phyllosticta spp. | Vertical section of pycnidia. |
| 5485019 | anthracnose | Colletotrichum spp. | Vertical section of acervulus showing conidiophores and conidia. |
| 5485017 | anthracnose | Colletotrichum spp. | Vertical section of acervulus showing conidiophores and conidia. |
| 5485014 | anthracnose | Colletotrichum spp. | Vertical section of acervuli. |
| 5485015 | anthracnose | Colletotrichum spp. | Vertical section of acervulus. |
| 5485013 | anthracnose | Colletotrichum spp. | Vertical section of acervuli. |
| 5484506 | Blumeriella leaf spot of cherry and plum | Blumeriella jaapii | Vertical section of acervulus of Phloeosporella anamorph. |
| 5484505 | Blumeriella leaf spot of cherry and plum | Blumeriella jaapii | Vertical section of acervulus of Phloeosporella anamorph. |
| 5476461 | Japanese apple rust | Gymnosporangium yamadae | Peridial cells |
| 5476460 | Japanese apple rust | Gymnosporangium yamadae | Peridial cells |
| 5476459 | Japanese apple rust | Gymnosporangium yamadae | Aecia with conical peridia |
| 5476457 | Japanese apple rust | Gymnosporangium yamadae | Aecia with conical peridia |
| 5458796 | Eastern filbert blight | Anisogramma anomala | Vertical section of ascal stroma showing embedded perithecia |
| 5458843 | powdery mildew | Phyllactinia spp. | Chasmothecium |
| 5459236 | Entomosporium fungus | Entomosporium spp. | Cross-section of acervuli in leaf tissue |
| 5459239 | Entomosporium fungus | Entomosporium spp. | Cross-section of floor of acervulus |
| 5459235 | Entomosporium fungus | Entomosporium spp. | Cross-section of acervulus in leaf tissue |
| 5459234 | Entomosporium fungus | Entomosporium spp. | Unruptured acervuli on leaf surface |
| 5458724 | Septoria leaf spot and cankers | Septoria spp. | Ruptured pycnidium with conidia |
| 5458723 | Septoria leaf spot and cankers | Septoria spp. | Leaf spot with pycnidia extruding conidia |
| 5458721 | Septoria leaf spot and cankers | Septoria spp. | Leaf spot with pycnidia extruding conidia |
| 5458722 | Septoria leaf spot and cankers | Septoria spp. | Leaf spot with pycnidia extruding conidia |
| 5458720 | Septoria leaf spot and cankers | Septoria spp. | Leaf spot with pycnidia extruding conidia |
| 5459257 | Ascochyta fungi | Ascochyta spp. | Top view of pycnidium in leaf tissue showing ostiole |
| 5459255 | Ascochyta fungi | Ascochyta spp. | Pycnidium side view |
| 5459256 | Ascochyta fungi | Ascochyta spp. | Top view of pycnidium in leaf tissue showing ostiole |
| 5459283 | Guignardia blotch of buckeyes and horsechestnuts | Guignardia aesculi | Top of pycnidium showing ostiole |
| 5459284 | Guignardia blotch of buckeyes and horsechestnuts | Guignardia aesculi | Top of pycnidia showing ostioles |
| 5459281 | Guignardia blotch of buckeyes and horsechestnuts | Guignardia aesculi | Top of pycnidium showing ostiole |
| 5459282 | Guignardia blotch of buckeyes and horsechestnuts | Guignardia aesculi | Top of pycnidium showing ostiole |
| 5459279 | Guignardia blotch of buckeyes and horsechestnuts | Guignardia aesculi | Cross-section of pycnidium |
| 5459277 | Guignardia blotch of buckeyes and horsechestnuts | Guignardia aesculi | Cross-section of pycnidium in leaf tissue |
| 5459278 | Guignardia blotch of buckeyes and horsechestnuts | Guignardia aesculi | Cross-section of pycnidium |
| 5459276 | Guignardia blotch of buckeyes and horsechestnuts | Guignardia aesculi | Leaf spot with pycnidia evident |
| 5458842 | powdery mildew | Phyllactinia spp. | Chasmothecium |
| 5458838 | powdery mildew | Phyllactinia spp. | Chasmothecium |
| 5458839 | powdery mildew | Phyllactinia spp. | Chasmothecium |
| 5458836 | powdery mildew | Phyllactinia spp. | Chasmothecia |
| 5458837 | powdery mildew | Phyllactinia spp. | Chasmothecia |
| 5458841 | powdery mildew | Phyllactinia spp. | Chasmothecia |
| 5458840 | powdery mildew | Phyllactinia spp. | Chasmothecia |
| 5458834 | powdery mildew | Erysiphe spp. | Chasmothecium |
| 5458833 | powdery mildew | Erysiphe spp. | Tip of chasmothecial appendages |
| 5458832 | powdery mildew | Erysiphe spp. | Chasmothecial appendages |
| 5458831 | powdery mildew | Erysiphe spp. | Chasmothecium |
| 5458830 | powdery mildew | Erysiphe spp. | Chasmothecium |
| 5458829 | powdery mildew | Erysiphe spp. | Tip of chasmothecial appendages |
| 5458828 | powdery mildew | Erysiphe spp. | Chasmothecia on leaf surface |
| 5459121 | Marssonina leaf spot | Marssonina betulae | Acervuli evident in leaf spot |
| 5459118 | Marssonina leaf spot | Marssonina betulae | Acervulus side view |
| 5459117 | Marssonina leaf spot | Marssonina betulae | Acervulus side view |
| 5459128 | Marssonina leaf spot | Marssonina betulae | Cross-section of acervulus in leaf tissue |
| 5459127 | Marssonina leaf spot | Marssonina betulae | Cross-section of acervulus in leaf tissue |
| 5459125 | Marssonina leaf spot | Marssonina betulae | Cross-section of acervulus in leaf tissue |
| 5459123 | Marssonina leaf spot | Marssonina betulae | Acervuli evident in leaf spot |
| 5459124 | Marssonina leaf spot | Marssonina betulae | Acervuli evident in leaf spot |
| 5458794 | Eastern filbert blight | Anisogramma anomala | Sectioned ascal stromata showing embedded perithecia. |
| 5458795 | Eastern filbert blight | Anisogramma anomala | Ascal stroma |
| 5458835 | powdery mildew | Phyllactinia spp. | Chasmothecia on leaf underside |
| 5458367 | leaf blister | Taphrina spp. | Leaf cross-section with asci on surface. |
| 5458365 | leaf blister | Taphrina spp. | Leaf cross-section with asci on surface |
