File:Varroa destructor on honeybee host.jpg
![File:Varroa destructor on honeybee host.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6a/Varroa_destructor_on_honeybee_host.jpg/800px-Varroa_destructor_on_honeybee_host.jpg?20070725135746)
原始文件 (2,400 × 1,710像素,文件大小:1.26 MB,MIME类型:image/jpeg)
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[编辑]描述Varroa destructor on honeybee host.jpg |
English: "Honey bees are important as honey producers and as pollinators of agricultural crops. They are estimated to provide "value added" pollination worth approximately $14 billion per year in the USA. Varroa mites threaten agricultural pollination directly by weakening and destroying bee colonies. They also mandate more regular management of hives that is both labor intensive and expensive.
"The first varroa species, Varroa jacobsoni, was described from Indonesia in 1904 parasitizing the local bees (Apis cerana). New research studies by Drs. D. L. Anderson and J. W. H. Trueman, (CSIRO, Australia) indicated that V. jacobsoni is a species complex containing 18 different genetic variants that belong to 2, possibly 5 different species of varroa mites. Anderson and Trueman indicated that they were unable to find morphological differences to distinguish the genetic types. The varroa associated with the European honey bee (Apis mellifera) was described as a new species, Varroa destructor by Anderson & Trueman, 2000. The Systematic Entomology Laboratory, Bee Research Laboratory and the Electron Microscopy Unit in the Soybean Genomics and Improvement Laboratory are examining the morphology of varroa mites. They expect that some morphological differences will be found to distinguish the newly discovered species of Varroa. If this is the case, this research will facilitate the scientific community's ability to study the ecology, biology, and control of these important pest mites. |
日期 | 2003年10月22日 (根据EXIF的数据) |
来源 | Source not available online. Reference: http://www.sel.barc.usda.gov/acari/frames/beemites.html |
作者 | Courtesy, Eric Erbe, Christopher Pooley: USDA, ARS, EMU. |
授权 (二次使用本文件) |
"All of the micrographs on the web site are in the public domain and can be freely used." --Christopher Pooley. |
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许可协议
[编辑]Public domainPublic domainfalsefalse |
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此图片处于公有领域,因为它所包含的材料最初来源于美国农业部下属研究机构农业研究服务局。
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日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
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当前 | 2007年7月25日 (三) 13:57 | ![]() | 2,400 × 1,710(1.26 MB) | Brian0918(留言 | 贡献) | rotated 180 |
2007年7月23日 (一) 15:09 | ![]() | 2,400 × 1,710(1.27 MB) | Brian0918(留言 | 贡献) | "Honey bees are important as honey producers and as pollinators of agricultural crops. They are estimated to provide "value added" pollination worth approximately $14 billion per year in the USA. Varroa mites threaten agricultural pollination directly by |
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宽度 | 2,400 px |
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高度 | 1,710 px |
压缩方案 | 未压缩 |
像素构成 | RGB |
图像数据位置 | 11,112 |
色彩组分数 | 3 |
每带行数 | 1,710 |
每压缩带字节数 | 12,312,000 |
数据排布 | 大块格式 |
使用软件 | Adobe Photoshop 7.0 |
文件修改日期时间 | 2003年10月22日 (三) 13:54 |