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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: Stem Decays and Cankers(X) Hardwood(X)
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Image Subject Name Scientific Name Description
5490319 Thousand Cankers Disease Geosmithia morbida Beginning of tree removal for black walnut killed by thousand cankers disease
5490216 Thousand Cankers Disease Geosmithia morbida Canker produced by Geosmithia morbida around gallery of walnut twig beetle in southern California walnut
5406048 Thousand Cankers Disease Geosmithia morbida Black walnuts in the end stage of thousand cankers. Photograph taken August 5, 2009. Associated with walnut twig beetle.
5406086 Thousand Cankers Disease Geosmithia morbida Crown thinning symptoms with thousand cankers in advanced stage infestation. Associated with walnut twig beetle.
5406096 Thousand Cankers Disease Geosmithia morbida Canker development around walnut twig beetle gallery in English walnut.
5406094 Thousand Cankers Disease Geosmithia morbida Canker development around walnut twig beetle gallery in English walnut.
5406090 Thousand Cankers Disease Geosmithia morbida Walnut twig beetle galleries and cankers in trunk of hybrid walnut. Associated with walnut twig beetle.
5406091 Thousand Cankers Disease Geosmithia morbida Walnut twig galleries and cankers in branch of hybrid walnut. Associated with walnut twig beetle.
5406088 Thousand Cankers Disease Geosmithia morbida Branch cankers that have developed around twig beetle galleries. Geosmithia can be seen fruiting in the center gallery. Associated with the walnut twig beetle.
5406089 Thousand Cankers Disease Geosmithia morbida branch cankers that have developed around twig beetle galleries. Associated with the walnut twig beetle.
5406085 Thousand Cankers Disease Geosmithia morbida Second in series of two. Black walnuts are showing advanced symptoms of thousand cankers disease in this picture taken September 18, 2009. tree died the following June. Associated with walnut twig beetle.
5408096 gray molds Botrytis spp.
5406044 Thousand Cankers Disease Geosmithia morbida Black walnut in end stage of thouand cankers. Photograph taken June 25, 2009; tree was removed one week later. During previos September symptoms were flaggong on a single branch. Associated with walnut twig beetle.
5406083 Thousand Cankers Disease Geosmithia morbida First in a series of two. Black walnuts that have recently died from thousand cankers disease. Photgraph taken June 11, 2009. Dieback was noted in September 18, 2008.
5406077 Thousand Cankers Disease Geosmithia morbida Canker produced following introduction of Geosmithia(isolate 12-181) into Northern california walnut seedling. Associated with walnut twig beetle.
5406078 Thousand Cankers Disease Geosmithia morbida Canker produced one week following introduction of Geosmithia (isolate 12-181) into southern California walnut seedling. Sporulation of the fungus is occuring at the edges of the wound.Associated with walnut twig beetle.
5406079 Thousand Cankers Disease Geosmithia morbida Canker produced approximately 5 weeks following introduction of Geosmithia (isolate 12-181) into Southern California walnut seedling. Sporulation of the fungus is occuring at the edges of the wound.
5406080 Thousand Cankers Disease Geosmithia morbida Canker produced approximately five weeks following the introduction of Geosmithia (isolate 12-181) into black walnut seedling. Associated with walnut twig beetle.
5406081 Thousand Cankers Disease Geosmithia morbida Canker produced approximately five weeks following introduction of Geosmithia (isolate 12-181) into black walnut seedling. Associated with walnut twig beetle.
5406074 Thousand Cankers Disease Geosmithia morbida Introduction of Geosmithia into wound during evaluation of Juglans susceptability to fungal pathogen of thousand cankers. Assocaited with walnut twig beetle.
5406075 Thousand Cankers Disease Geosmithia morbida Evaluation of Juglans seedlings for susceptibility to Geosmithia, the fungal pathogen of thousand cankers. Associated with walnut twig beetle.
5406076 Thousand Cankers Disease Geosmithia morbida Canker produced by control inoculation (1.2 PDA agar) of Norhtern california walnut. Normal wounds with no canker development results from this inoculation. Associated with walnut twig beetle.
5406068 Thousand Cankers Disease Geosmithia morbida Black walnut recently killed by thousand cankers  disease. Associated with walnut twig beetle.
5406069 Thousand Cankers Disease Geosmithia morbida Black walnuts recently killed by thousand cankers. Symptoms were first noted two years prior and trees recieved multiple applications of soil-applied imidacloprid.associated with walnut twig beetle.
5406070 Thousand Cankers Disease Geosmithia morbida large hybrid walnut fell after succumbing to thousand cankers disease. Associated with walnutt wig beetle.
5406071 Thousand Cankers Disease Geosmithia morbida Large hybrid walnut fell after succumbing to thousand cankers disease.
5406072 Thousand Cankers Disease Geosmithia morbida Wounding of walnut with hollow cone punch to determine susceptibility to Geosnithia fungus. Associated with walnut twig beetle.
5406067 Thousand Cankers Disease Geosmithia morbida Crown thinning and dieback associated with end stage thousand cankers disease. Asociated with walnut twig beetle.
5406054 Thousand Cankers Disease Geosmithia morbida Twig dieback associated with infestation of walnut twig beetle in Arizonia walnut.Associated with walnut twig beetle.
5406066 Thousand Cankers Disease Geosmithia morbida Large trunk cankers commomn in end stage infestations of thousand cankers. Several fungio, including Fusarium solani, can be cultured from these cankers.
5406050 Thousand Cankers Disease Geosmithia morbida Black walnut recently killed by thousand cankers. A healthy pecan is in background. Assocaited with walnut twig beetle.
5406052 Thousand Cankers Disease Geosmithia morbida Black walnut with advanced symptons of cankers. Associated with walnut twig beetle.
5406053 Thousand Cankers Disease Geosmithia morbida Black walnuts recently killed by thousand cankers. trees first showed symptoms two years earlier and had recieved two applications of imidacloprid in attempt to control disease progression. Associated with walnut twig beetle.
5406045 Thousand Cankers Disease Geosmithia morbida Black walnut in end stage of thousand cankers. Photograph June 25, 2009; tree was removed one week later. Associatd with walnut twig beetle.
5406046 Thousand Cankers Disease Geosmithia morbida Black walnut showing first external symptom of thousand cankers. A single flagging branch can be seen in the crown area on the upper right of the photograph. Associated with walnut twig beetle.
5406047 Thousand Cankers Disease Geosmithia morbida Black walnut showing early stage external symptoms of thousand cankers. A few branches in the crown are showing flagging and there is crown thinning. Associatd with walnut twig beetle.
5406049 Thousand Cankers Disease Geosmithia morbida Black walnut recently killed by thousand cankers. A healthy pecan is in the background. Associated with walnutt wig beetle.
5406041 Thousand Cankers Disease Geosmithia morbida Salvaged wlanut log from tree killed by thousand cankers stored in backyard.Associated with walnut twig beetle.
5406042 Thousand Cankers Disease Geosmithia morbida Training session to identify symptoms of thousand cankers.Assocaited with walnut twig beetle.
5406043 Thousand Cankers Disease Geosmithia morbida Training session to identify symptoms of thousand cankers. Associated with walnut twig beetle.
5382048 stem decay of black walnut Phellinus weirianus Fruiting bodies on trunk.  
5366667 Siberian elm canker Botryodiplodia hypodermia Signs and symptoms of Botryodiplodia canker (Botryodiplodia hypodermia) on an elm trunk.
5356715 Cytospora cankers Cytospora spp. Cytosporaspore tendrils on Sycamore

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