Milder autumns may increase risk for infection of crops with turnip yellows virus
Climate change has increased the risk for infection of crops with insect-transmitted viruses. Mild autumns provide prolonged active periods to insects, which may spread viruses to winter crops. In autumn 2018, green peach aphids ( ) were found in suction traps in southern Sweden that presented infec...
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| Published in: | Phytopathology Vol. 113; no. 9; p. 1788 |
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| Main Authors: | , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
United States
01.09.2023
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| Subjects: | |
| ISSN: | 0031-949X |
| Online Access: | Get more information |
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| Summary: | Climate change has increased the risk for infection of crops with insect-transmitted viruses. Mild autumns provide prolonged active periods to insects, which may spread viruses to winter crops. In autumn 2018, green peach aphids (
) were found in suction traps in southern Sweden that presented infection risk for winter oilseed rape (OSR;
) with turnip yellows virus (TuYV). A survey was carried out in spring 2019 with random leaf samples from 46 OSR fields in southern and central Sweden using DAS-ELISA resulting in TuYV being detected in all fields except one. In the counties of Skåne, Kalmar and Östergötland, the average incidence of TuYV-infected plants was 75% and the incidence reached 100% for nine fields. Sequence analyses of the coat protein gene revealed a close relationship between TuYV isolates from Sweden and other parts of the world. High-throughput sequencing for one of the OSR samples confirmed the presence of TuYV and revealed co-infection with TuYV-associated RNAs. Molecular analyses of seven sugar beet (
) plants with yellowing, collected in 2019, revealed that two of them were infected by TuYV together with two other poleroviruses: beet mild yellowing virus and beet chlorosis virus. The presence of TuYV in sugar beet suggests a spillover from other hosts. Poleroviruses are prone to recombination, and mixed infection with three poleroviruses in the same plant poses a risk for the emergence of new polerovirus genotypes. |
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| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 0031-949X |
| DOI: | 10.1094/PHYTO-11-22-0446-V |