Water beet yellowing virus
| Water beet yellowing virus | ||||||||||||||||||
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Discolored winter rape in Thuringia, October 2017 |
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| Turnip yellows virus | ||||||||||||||||||
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| TuYV (BrYV / BWYV) | ||||||||||||||||||
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The water beet yellowing virus ( English Turnip yellows virus , TuYV). also beet yellowing virus, like the (barley) yellow dwarfing virus , belongs to the family Luteoviridae . In the past, the names Beet western yellows virus (BWYV), Beet mild yellows virus (BMYV), Turnip mild yellows virus (TuMYV), Malva yellows virus , Radish yellows virus and Brassica yellows virus (BrYV) were used. On the basis of sequence comparisons, these different isolates could all be assigned to the same virus species. The yellow beet mosaic virus (also beet yellow mosaic virus ), namely Turnip yellow mosaic virus (TYMV), has a similar English name .
biology
The virus sits in the phloem of the plant and occurs primarily as a rape pest, but also affects other cruciferous vegetables (Brassicaceae) such as rape , oil radish , mustards and cabbage vegetables . Peas , lupine , field beans , phacelia , spinach , dandelion , corn poppy , ragwort , zinnia , tobacco and others can also be considered as host plants .
It is spread by aphids and, in rapeseed, often by the green peach aphid Myzus persicae .
In winter rape, the leaf margins of the rape plant turn reddish to purple in autumn. Since leaf discoloration can also be triggered by waterlogging, cold, soil compaction, straw mats in the soil or lack of nutrients, the virus should be detected by further tests.
The infected plants show weaker growth and a lower yield.
Footnotes
- ↑ ICTV Master Species List 2018b v2 MSL # 34v, March 2019
- ↑ a b c d ICTV: ICTV Master Species List 2019.v1 , New MSL including all taxa updates since the 2018b release, March 2020 (MSL # 35)
- ↑ a b c d Dr. A. Habekuss: The water beet yellowing virus - a threat to rapeseed cultivation? , Julius Kühn Institute, Institute for Resistance Research and Stress Tolerance, Quedlinburg
- ↑ a b Mareike Schaardt: Significance of the water beet yellowing virus in winter rape - biology of the pathogen and evaluation of studies from nationwide variety trials , diploma thesis in phytomedicine, May 2007, Kiel University of Applied Sciences - Agriculture Department, Osterrönfeld
- ↑ Monitoring of the occurrence of the turnip yellows virus (TuYV) in winter rape in Germany , research program 2017 of the Research Information System for Agriculture and Food (FISA) - information portal of the federal and state governments