File:1440035-PPT.jpg
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Summary
[edit]Description1440035-PPT.jpg |
English: Descriptor: Symptoms of tobacco vein mottling virus (TVMV) (Potyvirus TVMV)
Description:The initial symptom of TVMV infection is a slight, barely visible clearing on expanding leaves. Subsequently, leaves develop irregular green patterns of mottling adjacent to the veins; this is most evident on the ruffles at the base of older leaves. Chlorosis of infected leaves is extensive, giving the plants a pale green or yellow appearance which may be evident from a distance. Necrotic spotting of the leaf, indistinguishable from weather fleck, may develop and become increasingly prevalent as plants mature. The earlier that plants are infected with the virus, the greater the damage. The virus overwinters in perennial solanaceous weeds and is transmitted to tobacco by aphids. The virus is often found in combination with TEV. TVMV is also one of the most prevalent viruses in burley. Image type:Field Host:burley tobacco (Nicotiana tabacum (burley type) L.) |
Date | |
Source |
R.J. Reynolds Tobacco Company, Bugwood.org https://www.invasive.org/browse/detail.cfm?imgnum=1440035 |
Author | R.J. Reynolds Tobacco Company |
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current | 23:55, 12 July 2021 | 768 × 512 (91 KB) | Guest2625 (talk | contribs) | Uploaded a work by R.J. Reynolds Tobacco Company from R.J. Reynolds Tobacco Company, Bugwood.org https://www.invasive.org/browse/detail.cfm?imgnum=1440035 with UploadWizard |
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Orientation | Normal |
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Horizontal resolution | 2,400 dpi |
Vertical resolution | 2,400 dpi |
Software used | ACD Systems Digital Imaging |
File change date and time | 12:31, 19 November 2002 |
Y and C positioning | Centered |
Exif version | 2.1 |
DateTime subseconds | 258 |