Howard F. Schwartz's Images
Title: Professor of Plant Pathology & Assoc. Dept. HeadOrganization: Colorado State University
Unit: Plant Pathology
Country: United States
Web: http://www.alliumnet.com/index.htm
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Howard F. Schwartz is a Professor of Plant Pathology & Associate Department Head in the Department of Bioagricultural Sciences and Pest Management at Colorado State University. His Research and Extension Interests include Integrated Pest Management (IPM) - particularly of rust and white mold of dry bean as well as bacterial diseases and Iris Yellow Spot Virus of onion. Specific areas include management by disease survey, a reporting network supported by GPS/GIS technology, disease resistance, cultural practices, and timely applications of pesticides in response to environmental monitoring and crop/pest modeling. He is also interested in making sure the delivery of time-sensitive information on Integrated Pest Management and Crop Production Systems is coordinated via traditional methods (newsletters, bulletins, alerts, meetings, field days) and via the internet (Legume Pipe, VegNet, Allium Net). He is also the person leading and coordinating the CSU Node of the Bugwood Network. |
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| 136 Images of 33 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 5359599 | puccinia rusts | Puccinia spp. | Aecia of rust (Puccinia sp.) on a thistle leaf. |
| 5362785 | powdery mildew | Podosphaera fuliginea | A pumpkin field with signs of advanced powdery mildew infection caused by the fungus Sphaerotheca fuliginea. |
| 5362784 | powdery mildew | Podosphaera fuliginea | A pumpkin field with signs of initial powdery mildew infection caused by the fungus Sphaerotheca fuliginea. |
| 5362783 | powdery mildew | Podosphaera fuliginea | A pumpkin leaf infected by the powdery mildew fungus Sphaerotheca fuliginea in the field. |
| 5361071 | loose smut | Ustilago avenae | An oat head infected with the loose smut fungus Ustilago avenae in the field. |
| 5359185 | Sclerotinia rot | Sclerotinia sclerotiorum | A carrot field with white mold infection caused by the fungus Sclerotinia sclerotiorum at Lucerne. Please note the white mold sclerotia (black bodies) beneath the carrot canopy. |
| 5359184 | Sclerotinia rot | Sclerotinia sclerotiorum | A carrot field with white mold infection caused by the fungus Sclerotinia sclerotiorum at Lucerne. |
| 5358921 | powdery mildew | Podosphaera fuliginea | A cucumber plant showing signs of powdery mildew infection in the field. |
| 5365251 | bacterial blight | Pseudomonas syringae pv. aptata | Signs of bacterial leaf spot (Pseudomonas syringae pv. aptata) on a beet leaf. |
| 5365249 | bacterial blight | Pseudomonas syringae pv. aptata | Signs of bacterial leaf spot (Pseudomonas syringae pv. aptata) on a beet leaf. |
| 5365250 | bacterial blight | Pseudomonas syringae pv. aptata | Signs of bacterial leaf spot (Pseudomonas syringae pv. aptata) on a beet leaf. |
| 5365248 | bacterial blight | Pseudomonas syringae pv. aptata | Signs of bacterial leaf spot (Pseudomonas syringae pv. aptata) on a beet leaf. |
| 5365247 | bacterial blight | Pseudomonas syringae pv. aptata | Signs of bacterial leaf spot (Pseudomonas syringae pv. aptata) on a beet leaf. |
| 5357376 | Sclerotinia rot | Sclerotinia sclerotiorum | A sunflower plant with white mold infection caused by Sclerotinia sclerotiorum in the field. The fungus mycellia are the white mass around the base of the stem. |
| 5357375 | Sclerotinia rot | Sclerotinia sclerotiorum | Sunflower plants with white mold infection caused by Sclerotinia sclerotiorum in the field. The fungus mycellia are the white mass around the base of the stem. |
| 5357461 | oat stem rust | Puccinia graminis f.sp. avenae | An oat plant infected with the oat stem rust fungus (Puccinia graminis f.sp. avenae) in the field. |
| 5357460 | covered smut | Ustilago hordei | An oat head infected with covered smut caused by Ustilago hordei in the field. |
| 5357459 | loose smut | Ustilago avenae | Seed head of oats showing signs of infection with loose smut (Ustilago avenae). |
| 5357456 | crown rust | Puccinia coronata | Evidence of infection with crown rust (Puccinia coronata) on oat leaves. |
| 5362700 | bacterial spot | Xanthomonas vesicatoria | Leaves of a pepper plant showing signs and symptoms of bacterial leaf spot (Xanthomonas vesicatoria). |
| 5362699 | bacterial spot | Xanthomonas vesicatoria | Bell pepper showing signs of infection with Xanthomonas vesicatoria (bacterial leaf spot). |
| 5359195 | genetic abnormalities | A vegetative chimera of a pepper plant due to a genetic abnormality. | |
| 5357476 | ergot | Claviceps purpurea | A rye head showing the honeydew stage of the ergot fungus Claviceps purpurae in the field. |
| 5361120 | powdery mildews | Sugar beet leaves showing signs of infection with powdery mildew. | |
| 5358911 | unknown | Soybean leaves in Puerto Rico, with pustules caused by infection with an unknown bacterium. | |
| 5357204 | Rhizoctonia damping-off, blight and rot | Rhizoctonia solani | Close-up view of sugar beet root sliced open to show signs of infection with Rhizoctonia crown rot (Rhizoctonia solani). |
| 5357203 | Rhizoctonia damping-off, blight and rot | Rhizoctonia solani | Sugar beet plant pulled up and sliced open to show signs of infection with Rhizoctonia crown rot (Rhizoctonia solani) in the root. |
| 5357588 | powdery mildew | Erysiphe betae | Sugar beet leaf showing signs of powdery mildew (Erysiphe polygoni). |
| 5357587 | powdery mildew | Erysiphe betae | Leaves of sugar beets showing signs of powdery mildew (Erysiphe polygoni). |
| 5357586 | powdery mildew | Erysiphe betae | Leaves of sugar beets showing signs of powdery mildew (Erysiphe polygoni). |
| 5357585 | powdery mildew | Erysiphe betae | Sugar beet plants showing signs of infection with powdery mildew (Erysiphe polygoni). |
| 5357584 | powdery mildew | Erysiphe betae | Sugar beet plants showing signs of infection with powdery mildew (Erysiphe polygoni). |
| 5357583 | powdery mildew | Erysiphe betae | Sugar beet plants showing signs of infection with powdery mildew (Erysiphe polygoni). |
| 5357582 | powdery mildew | Erysiphe betae | Sugar beet plants showing signs of infection with powdery mildew (Erysiphe polygoni). |
| 5365336 | dry bean rust | Uromyces appendiculatus | Rust pycnia (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5357529 | Sclerotinia rot | Sclerotinia sclerotiorum | Some bean pods showing signs of the white mlod fungus Sclerotinia sclerotiorum in the field. |
| 5359553 | white rust | Albugo tragopogonis | Pigweed (Amaranthus retroflexus) leaves harboring the white rust pathogen Albugo tragopogonis. |
| 5359552 | white rust | Albugo tragopogonis | Pigweed (Amaranthus retroflexus) leaves harboring the white rust pathogen Albugo tragopogonis. |
| 5362505 | early blight | Alternaria solani | Signs and symptoms of early blight (Alternaria solani), a disease of potatoes, on the leaf of a weedy nightshade (Solanum sp.). |
| 5362981 | rust | Puccinia aristidae | Lambsquarters (Chenopodium album) showing symptoms of spinach red rust (Puccinia aristidae). |
| 5362980 | rust | Puccinia aristidae | Lambsquarters (Chenopodium album) showing symptoms of spinach red rust (Puccinia aristidae). |
| 5359598 | rusts | Rust pycnia on musk thistle, Carduus nutans. | |
| 5357458 | puccinia rusts | Puccinia spp. | Thistle showing signs of rust. |
| 5357248 | rust | Puccinia helianthi | Close-up view of the aecium of sunflower red rust (Puccinia helianthi) on a volunteer sunflower plant (Helianthus annuus). |
| 5357247 | rust | Puccinia helianthi | Close-up view of the pycnium of sunflower red rust (Puccinia helianthi) on a volunteer sunflower plant (Helianthus annuus). |
| 5357245 | rust | Puccinia helianthi | Sexual spores of sunflower red rust (Puccinia helianthi) on a volunteer sunflower plant (Helianthus annuus). |
| 5357244 | rust | Puccinia helianthi | Sexual spores of sunflower red rust (Puccinia helianthi) on a volunteer sunflower plant (Helianthus annuus). |
| 5362587 | head smut | Sphacelotheca reiliana | Signs and symptoms of head smut (Sphacelotheca reiliana) on field corn. |
| 5359955 | Gibberella stalk rot | Gibberella zeae | Evidence of scab (Fusarium graminearum) on a head of winter wheat. |
| 5359956 | Gibberella stalk rot | Gibberella zeae | Evidence of scab (Fusarium graminearum) on a head of winter wheat. |
| 5359954 | Gibberella stalk rot | Gibberella zeae | Evidence of scab (Fusarium graminearum) on a head of winter wheat. |
| 5362128 | stripe rust | Puccinia striiformis | Close-up view of spring wheat leaves showing signs and symptoms of stripe rust (Puccinia striiformis). |
| 5362126 | stripe rust | Puccinia striiformis | Close-up view of spring wheat leaves showing signs and symptoms of stripe rust (Puccinia striiformis). |
| 5362124 | stripe rust | Puccinia striiformis | Close-up view of a spring wheat leaf showing signs and symptoms of stripe rust (Puccinia striiformis). |
| 5362122 | stripe rust | Puccinia striiformis | Close-up view of spring wheat leaves showing signs and symptoms of stripe rust (Puccinia striiformis). |
| 5362118 | stripe rust | Puccinia striiformis | Close-up view of spring wheat leaves showing signs and symptoms of stripe rust (Puccinia striiformis). |
| 5362120 | stripe rust | Puccinia striiformis | Close-up view of spring wheat leaves showing signs and symptoms of stripe rust (Puccinia striiformis). |
| 5359591 | rust | Puccinia hordei | Leaf rust (Puccinia recondita f.sp. tritici) on winter wheat. |
| 5359590 | wheat stem rust | Puccinia graminis | Stem rust (Puccinia graminis f.sp. tritici) on winter wheat. |
| 5357242 | rust | Puccinia helianthi | Sexual spores of rust (Puccinia helianthi) on a volunteer sunflower plant growing as a weed in a field of winter wheat. |
| 5360612 | Sclerotinia rot | Sclerotinia sclerotiorum | The colonization of a drybeans leaf by the white mold fungus Sclerotinia sclerotiorum in the field. |
| 5360613 | Sclerotinia rot | Sclerotinia sclerotiorum | The colonization of a drybeans leaf by the white mold fungus Sclerotinia sclerotiorum in the field. |
| 5365363 | Fusarium wilt | Fusarium oxysporum f.sp. phaseoli | Symptoms of fusarium wilt (Fusarium oxysporum f. sp. phaseoli) on dry bean plants in the field. |
| 5365362 | dry bean rust | Uromyces appendiculatus | Blisters (young uredia) on bean leaves, due to infection with bean rust (Uromyces appendiculatus). |
| 5365361 | dry bean rust | Uromyces appendiculatus | Blisters (young uredia) on a bean leaf, due to infection with bean rust (Uromyces appendiculatus). |
| 5365360 | dry bean rust | Uromyces appendiculatus | Uredia and necrosis on a bean leaf, due to infection with bean rust (Uromyces appendiculatus). |
| 5365359 | dry bean rust | Uromyces appendiculatus | Telia and uredia of bean rust (Uromyces appendiculatus) on the leaves of a bean plant. |
| 5365358 | dry bean rust | Uromyces appendiculatus | Telia of bean rust (Uromyces appendiculatus) on the leaf of a bean plant. |
| 5365357 | dry bean rust | Uromyces appendiculatus | Telia of bean rust (Uromyces appendiculatus) on the leaf of a bean plant. |
| 5365356 | dry bean rust | Uromyces appendiculatus | Telia of bean rust (Uromyces appendiculatus) on the stem of a bean plant. |
| 5365355 | dry bean rust | Uromyces appendiculatus | Aecia of bean rust (Uromyces appendiculatus) on the stem of a dry bean plant inoculated in the greenhouse. |
| 5365354 | dry bean rust | Uromyces appendiculatus | Aecia of bean rust (Uromyces appendiculatus) on the stem of a dry bean plant inoculated in the greenhouse. |
| 5365353 | dry bean rust | Uromyces appendiculatus | Aecia of bean rust (Uromyces appendiculatus) on the stem of a dry bean plant inoculated in the greenhouse. |
| 5365352 | dry bean rust | Uromyces appendiculatus | Pycnia and aecia of bean rust (Uromyces appendiculatus) on the stems of dry bean plants inoculated in the greenhouse. |
| 5365351 | dry bean rust | Uromyces appendiculatus | Close-up view of aecia of bean rust (Uromyces appendiculatus) on the stem of a dry bean plant inoculated in the greenhouse. |
| 5365350 | dry bean rust | Uromyces appendiculatus | Aecia of bean rust (Uromyces appendiculatus) on the stem of a dry bean plant inoculated in the greenhouse. |
| 5365349 | dry bean rust | Uromyces appendiculatus | Aecia of bean rust (Uromyces appendiculatus) on the petiole of a dry bean plant inoculated in the greenhouse. |
| 5365348 | dry bean rust | Uromyces appendiculatus | Pycnia of rust (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5365346 | dry bean rust | Uromyces appendiculatus | Aecia of bean rust (Uromyces appendiculatus) on the stems of volunteer dry bean plants. |
| 5365347 | dry bean rust | Uromyces appendiculatus | Rust pycnium (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5365345 | dry bean rust | Uromyces appendiculatus | Aecia of bean rust (Uromyces appendiculatus) on the leaves of volunteer dry bean plants. |
| 5365344 | dry bean rust | Uromyces appendiculatus | Aecium of bean rust (Uromyces appendiculatus) on the petiole of a volunteer dry bean plant. |
| 5365343 | dry bean rust | Uromyces appendiculatus | Aecia and pycnia of bean rust (Uromyces appendiculatus) on the leaves and stem of a volunteer dry bean plant. |
| 5365342 | dry bean rust | Uromyces appendiculatus | Rust (Uromyces appendiculatus) aecia and pycnia on the leaves of a volunteer dry bean plant. |
| 5365341 | dry bean rust | Uromyces appendiculatus | Rust pycnia (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5365340 | dry bean rust | Uromyces appendiculatus | Rust pycnia (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5365339 | dry bean rust | Uromyces appendiculatus | Rust pycnia (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5365338 | dry bean rust | Uromyces appendiculatus | Rust pycnia (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5365337 | dry bean rust | Uromyces appendiculatus | Rust pycnium (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5365334 | dry bean rust | Uromyces appendiculatus | Rust pycnia (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5365335 | dry bean rust | Uromyces appendiculatus | Rust pycnia (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5365332 | dry bean rust | Uromyces appendiculatus | Rust aecium (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5365333 | dry bean rust | Uromyces appendiculatus | Rust aecia (Uromyces appendiculatus) on the leaf of a volunteer dry bean plant. |
| 5364350 | spider mites | Underside of a bean leaf, showing spider mites and the damage they have caused. | |
| 5364351 | spider mites | Underside of a bean leaf, showing spider mites and the damage they have caused. | |
| 5363979 | Sclerotinia rot | Sclerotinia sclerotiorum | Mycelium and sclerotia of white mold (Sclerotinia sclerotiorum) on the branch of a dry bean plant. |
| 5363975 | Sclerotinia rot | Sclerotinia sclerotiorum | Fallen blossoms of dry bean that have been colonized by white mold (Sclerotinia sclerotiorum). |
| 5363974 | Sclerotinia rot | Sclerotinia sclerotiorum | Apothecia of white mold (Sclerotinia sclerotiorum) and fallen leaves of dry bean that have been colonized by white mold. |
| 5363973 | Sclerotinia rot | Sclerotinia sclerotiorum | Apothecia of white mold (Sclerotinia sclerotiorum) and fallen blossoms of dry bean that have been colonized by white mold. |
| 5363950 | dry bean rust | Uromyces appendiculatus | Rust telia (Uromyces appendiculatus) on bean pods in the field. |
| 5363949 | dry bean rust | Uromyces appendiculatus | Rust telia (Uromyces appendiculatus) on stems and pods of bean plants in the field. |
| 5363948 | dry bean rust | Uromyces appendiculatus | Rust uredia and telia (Uromyces appendiculatus) on the surface of a bean leaf. |
| 5363947 | dry bean rust | Uromyces appendiculatus | Rust uredia (Uromyces appendiculatus) on the underside of bean leaflets. |
| 5363946 | dry bean rust | Uromyces appendiculatus | Rust uredia (Uromyces appendiculatus) on the upper surface of bean leaflets. |
| 5363945 | dry bean rust | Uromyces appendiculatus | Aecia of rust (Uromyces appendiculatus) on the leaf of a volunteer bean plant. |
| 5363944 | dry bean rust | Uromyces appendiculatus | Telia of rust (Uromyces appendiculatus) on the stem of a bean plant. |
| 5361410 | dry bean rust | Uromyces appendiculatus | Uredinia of bean rust (Uromyces appendiculatus) on a bean pod. |
| 5361409 | dry bean rust | Uromyces appendiculatus | Uredinia of bean rust (Uromyces appendiculatus) on plants, causing wilting of the bean canopy in the field. |
| 5361408 | dry bean rust | Uromyces appendiculatus | Defoliation of bean plants due to bean rust (Uromyces appendiculatus), with telia on the plants. |
| 5361407 | dry bean rust | Uromyces appendiculatus | Uredinia of bean rust (Uromyces appendiculatus) on the leaves of plants in the field. |
| 5361405 | dry bean rust | Uromyces appendiculatus | Uredinia of rust (Uromyces appendiculatus) on the upper surface of a bean leaf. |
| 5361404 | dry bean rust | Uromyces appendiculatus | Leaves of volunteer bean plants infected with young and mature uredia of bean rust. |
| 5361403 | dry bean rust | Uromyces appendiculatus | Stem of a volunteer bean plant infected with the pycnia and aecia of bean rust. |
| 5361402 | dry bean rust | Uromyces appendiculatus | Leaves of volunteer bean plants infected with the pycnia, aecia, and uredia of bean rust. |
| 5361399 | dry bean rust | Uromyces appendiculatus | "Harvesting" the urediniospores of bean rust (Uromyces appendiculatus) from bean leaves in the greenhouse. |
| 5361398 | dry bean rust | Uromyces appendiculatus | Telia of bean rust (Uromyces appendiculatus) on a bean leaf. |
| 5361396 | Sclerotinia rot | Sclerotinia sclerotiorum | Debris from screenings of culled beans, with sclerotia of white mold (Sclerotinia sclerotiorum) mixed among them. |
| 5361391 | Sclerotinia rot | Sclerotinia sclerotiorum | Fallen bean blossom colonized by white mold (Sclerotinia sclerotiorum), with apothecia of white mold in the soil nearby. |
| 5361390 | Sclerotinia rot | Sclerotinia sclerotiorum | White mold (Sclerotinia sclerotiorum) apothecia. |
| 5361389 | Sclerotinia rot | Sclerotinia sclerotiorum | Bean pod and a bean blossom that have been colonized by white mold (Sclerotinia sclerotiorum). |
| 5361388 | Sclerotinia rot | Sclerotinia sclerotiorum | White mold (Sclerotinia sclerotiorum) apothecia. |
| 5361387 | Sclerotinia rot | Sclerotinia sclerotiorum | White mold (Sclerotinia sclerotiorum) apothecia. |
| 5360404 | aphids | Winged aphids, the vectors of Bean Common Mosaic Virus (BCMV), on a bean leaflet. | |
| 5360406 | leafhoppers | A leafhopper on a drybean leaflet in the field. | |
| 5360385 | southern blight | Sclerotium rolfsii | Bean plants with the sclerotia of Athelia rolfsii (Sclerotium rolfsii), the causal fungus of beans southern blight in the field. |
| 5358997 | fungus | Sclerotium delphinii | Evidence of southern blight (Sclerotium rolfsii) on the roots of dry beans. |
| 5365868 | rusts | weed, yellow nutsedge, Cyperus esculentus, disease, rust, onion | |
| 5365867 | rusts | weed, yellow nutsedge, Cyperus esculentus, disease, rust, onion | |
| 5362728 | purple blotch | Alternaria porri | onion purple blotch, disease, Alternaria porri |
| 5362726 | purple blotch | Alternaria porri | onion purple blotch, disease, Alternaria porri |
| 5362725 | purple blotch | Alternaria porri | onion purple blotch, disease, Alternaria porri |
| 5362724 | purple blotch | Alternaria porri | onion purple blotch, disease, Alternaria porri |
| 5362723 | purple blotch | Alternaria porri | onion purple blotch, disease, Alternaria porri |
| 5362722 | purple blotch | Alternaria porri | onion purple blotch, disease, Alternaria porri |
| 5362721 | purple blotch | Alternaria porri | onion, purple blotch, disease, Alternaria porri |
| 5362720 | purple blotch | Alternaria porri | disease, onion, purple blotch, Alternaria porri |
