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Colorado State University

Colorado State University is one of our nation's leading research universities with world-class research in infectious disease, atmospheric science, clean energy technologies, and environmental science. It was founded in 1870 as the Colorado Agricultural College, six years before the Colorado Territory became a state.

Colorado State University, located in Fort Collins, Colorado, is situated on nearly 5,000 acres of land, including the main campus, a foothills campus, an agricultural campus, and a mountain campus (Pingree Park). Colorado State also has 4,600 acres for research centers, Cooperative Extension offices, and Colorado State Forest Service stations.
Remove Filters: Foliage Diseases(X) Research(X) Field(X) Onions(X) Howard F. Schwartz(X)
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Image Subject Name Scientific Name Description
5362222 downy mildew Peronospora destructor Agricultural Research Demonstration Education Center (ARDEC), Fort Collins, Colorado onion trial, Onion Disease, Onion Downy Mildew, Pesticide application
5362218 downy mildew Peronospora destructor Agricultural Research Demonstration Education Center (ARDEC), Fort Collins, Colorado onion trial, 09/10/1997, Onion Disease, Onion Downy Mildew, Pesticide application
5365292 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant showing blight sypmtoms caused by the bacteria Xanthomonas axonopodis pv. allii in the field.
5365293 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant showing blight sypmtoms caused by the bacteria Xanthomonas axonopodis pv. allii in the field.
5365294 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant showing blight sypmtoms caused by the bacteria Xanthomonas axonopodis pv. allii in the field.
5365295 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant showing blight sypmtoms caused by the bacteria Xanthomonas axonopodis pv. allii in the field.
5365296 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant showing blight sypmtoms caused by the bacteria Xanthomonas axonopodis pv. allii in the field.
5365297 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant showing blight sypmtoms caused by the bacteria Xanthomonas axonopodis pv. allii in the field.
5365298 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant showing blight sypmtoms caused by the bacteria Xanthomonas axonopodis pv. allii in the field.
5365862 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant showing blight sypmtoms caused by the bacteria Xanthomonas axonopodis pv. allii in the field.
5365861 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant showing blight sypmtoms caused by the bacteria Xanthomonas axonopodis pv. allii in the field.
5365859 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant leaves showing blight sypmtoms caused by the bacteria Xanthomonas campestris in the field.
5365860 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant leaves showing blight sypmtoms caused by the bacteria Xanthomonas campestris in the field.
5365278 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plants showing blight sypmtoms caused by the bacteria Xanthomonas campestris in the field.
5365280 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plants showing blight sypmtoms caused by the bacteria Xanthomonas campestris in the field.
5365281 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plants showing blight sypmtoms caused by the bacteria Xanthomonas campestris in the field.
5365279 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plants showing blight sypmtoms caused by the bacteria Xanthomonas campestris in the field.
5365277 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plants showing blight sypmtoms caused by the bacteria Xanthomonas campestris in the field.
5365284 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant leaves showing blight sypmtoms caused by the bacteria Pantoea ananitas and Xanthomonas campestris in the field.
5365282 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plant leaves showing blight sypmtoms caused by the bacteria Pantoea ananitas and Xanthomonas campestris in the field.
5365283 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plants showing blight sypmtoms caused by the bacteria Pantoea ananitas and Xanthomonas campestris in the field.
5365267 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii An onion plant leaf showing blight sypmtoms caused by the bacteria Xanthomonas campestris in the field.
5361700 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plants showing sypmtoms of bacterial leaf blight caused by Xanthomonas axonopodis pv. allii in the field.
5361699 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plants showing sypmtoms of bacterial leaf blight caused by Xanthomonas axonopodis pv. allii in the field.
5361698 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii A close-up view of an onion plant leaf showing sypmtoms of bacterial leaf blight caused by Xanthomonas axonopodis pv. allii on the field.
5361697 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii A close-up view of an onion plant leaf showing sypmtoms of bacterial leaf blight caused by Xanthomonas axonopodis pv. allii on the field.
5361696 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plants showing sypmtoms of bacterial leaf blight caused by Xanthomonas axonopodis pv. allii on the field.
5361589 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii A close-up view of onion plant leaves showing sypmtoms of bacterial leaf blight caused by Xanthomonas axonopodis pv. allii on a field at Granada.
5361588 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii A close-up view of onion plant leaves showing sypmtoms of bacterial leaf blight caused by Xanthomonas axonopodis pv. allii on a field at Granada.
5361586 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plants showing sypmtoms of bacterial leaf blight caused by Xanthomonas axonopodis pv. allii on a field at Granada.
5361587 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii Onion plants showing sypmtoms of bacterial leaf blight caused by Xanthomonas axonopodis pv. allii in a field at Granada.
5361590 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii A close-up view of onion plant leaves showing sypmtoms of bacterial leaf blight caused by Xanthomonas axonopodis pv. allii on a field at Granada.
5364058 purple blotch Alternaria porri Purple blotch lesion on the neck region of an onion plant caused by Alternaria porri.
5364057 downy mildew Peronospora destructor A close-up shot of downy mildew Peronospora destructor on an onion leaf.
5364056 purple blotch Alternaria porri An onion fungicide test plot at Vineland used in the study of onion purple blotch caused by Alternaria porri.
5362948 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii A scenic view of an onion field with symptoms of Xanthomonas leaf blight caused by Xanthomonas axonopodis pv. allii.
5362947 Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii A scenic view of an onion field with symptoms of Xanthomonas leaf blight caused by Xanthomonas axonopodis pv. allii.
5362946 purple blotch Alternaria porri A field trial of onions for the purple blocth disease caused by Alternaria porri.
5362945 purple blotch Alternaria porri A field trial of onions for the purple blocth disease caused by Alternaria porri.
5362944 purple blotch Alternaria porri An onion field during the mid stages of the purple blocth disease caused by Alternaria porri trial in the field.
5362943 purple blotch Alternaria porri An onion field during the mid stages of the purple blocth disease caused by Alternaria porri trial in the field.
5362942 purple blotch Alternaria porri An onion field during the early stages of the purple blocth disease caused by Alternaria porri trial in the field.
5362941 purple blotch Alternaria porri An onion plant with the purple blocth disease caused by Alternaria porri in the field.
5362939 purple blotch Alternaria porri An onion plant with the purple blocth disease caused by Alternaria porri in the field.
5362940 purple blotch Alternaria porri An onion plant with the purple blocth disease caused by Alternaria porri in the field.
5362926 purple blotch Alternaria porri A volunteer onion plant with the purple blocth disease caused by Alternaria porri in a winter wheat field as identified by Dave Herrera.
5362925 purple blotch Alternaria porri A volunteer onion plant with the purple blocth disease caused by Alternaria porri in a winter wheat field
5361488 purple blotch Alternaria porri An in-filed focus on the symptoms of purple blotch Alternaria porri on a field of onion plants.
5361487 purple blotch Alternaria porri Advanced symptoms of onion purple blotch Alternaria porri on a field of onion plants.
5361486 purple blotch Alternaria porri Early leaf symptoms of onion purple blotch Alternaria porri on onion.
5361485 downy mildew Peronospora destructor An in-filed focus of onion downy mildew, Peronospora destructor.
5361484 downy mildew Peronospora destructor Advanced leaf symptoms of downy mildew, Peronospora destructor on a field of onion plants
5361483 downy mildew Peronospora destructor Advanced leaf symptoms of downy mildew, Peronospora destructor on a field of onion plants.
5361482 downy mildew Peronospora destructor Early leaf symptoms of downy mildew, Peronospora destructor on a field onion plants.
5361481 downy mildew Peronospora destructor Early leaf symptoms of downy mildew, Peronospora destructor on a field onion plant leaf.
5361480 downy mildew Peronospora destructor Early leaf symptoms of downy mildew, Peronospora destructor on a field onion plant leaf.
5361476 onion smudge Colletotrichum circinans A matured onion bulb showing the onion smudge disease.
5357389 downy mildew Peronospora destructor Onions in a field plot, research on downy mildew.
5357388 downy mildew Peronospora destructor Field plot, research on downy mildew in onions.
5357387 downy mildew Peronospora destructor Field plot, research conducted on downy mildew in onions.

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