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Virginia Polytechnic Institute and State University is a public land-grant university serving the Commonwealth of Virginia, the nation, and the world community. The discovery and dissemination of new knowledge are central to its mission. Through its focus on teaching and learning, research and discovery, and outreach and engagement, the university creates, conveys, and applies knowledge to expand personal growth and opportunity, advance social and community development, foster economic competitiveness, and improve the quality of life. |
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Biological Control(X)
| 18 Images of 3 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 0580015 | musk thistle head weevil | Rhinocyllus conicus | site before release |
| 0580017 | musk thistle head weevil | Rhinocyllus conicus | tufts of hair rising from infested thistle head |
| 0580005 | musk thistle head weevil | Rhinocyllus conicus | adult and eggs on thistle head |
| 0580024 | thistle crown weevil | Trichosirocalus horridus | neocrosis of rosette due to feeding |
| 0580019 | musk thistle head weevil | Rhinocyllus conicus | |
| 0580014 | musk thistle head weevil | Rhinocyllus conicus | feeding on receptacle of thistle head |
| 0580020 | musk thistle head weevil | Rhinocyllus conicus | |
| 0580032 | thistle crown weevil | Trichosirocalus horridus | |
| 0580021 | musk thistle head weevil | Rhinocyllus conicus | on thistle head |
| 0580022 | musk thistle head weevil | Rhinocyllus conicus | thistle head showing pupation chambers |
| 0580027 | thistle crown weevil | Trichosirocalus horridus | close up of third instar |
| 0580028 | thistle crown weevil | Trichosirocalus horridus | stand before release of weevil |
| 0580030 | thistle crown weevil | Trichosirocalus horridus | collapse of thistle rosette infested by larvae |
| 0580031 | thistle crown weevil | Trichosirocalus horridus | stand 8 years after release |
| 0580018 | musk thistle head weevil | Rhinocyllus conicus | site five years after release |
| 0580006 | puccinia rust | Puccinia carduorum | infested thistle leaf |
| 0580007 | puccinia rust | Puccinia carduorum | close up of infection |
| 0580008 | puccinia rust | Puccinia carduorum | urendiniospores and teliospores |
