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Rose Rosette Disease (1771 words) |
 | Rose rosette disease (RRD), a disease believed to be caused by a virus, has been spreading through much of the wild rose population of the midwestern, southern and eastern United States for years, and has now been confirmed in cultivated roses in Virginia. |
| Rose rosette disease is caused by a virus or virus-like pathogen yet to be characterized. |
| The causal agent of rose rosette disease is not soil-borne, so it is possible to successfully plant healthy roses in beds where diseased plants have been removed; however, the pathogen may persist in old root pieces that remain in the soil from previous diseased roses. |
| Rosette Nebula - Wikipedia, the free encyclopedia (157 words) |
| The Rosette Nebula (also known as NGC 2237) is a large, circular H II region located near one end of a giant molecular cloud in the Monoceros constellation. |
| It is believed that stellar winds from a group of O and B stars are exerting pressure on interstellar clouds to cause compression, followed by star formation in the nebula. |
| The Rosette Nebula has an angular diameter of 1.3° and lies some 900 parsecs or 3000 light years from Earth's Solar System. |
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