Written by Charlotte Cunningham
OSR growers are being urged to be aware of the risk from TuYV as results from a recent survey confirmed that a third of susceptible UK crops are infected, with severe implications on yields, according to plant breeders, Limagrain. Charlotte Cunningham reports. Turnips yellows virus (TuYV) is transmitted by aphids and it is believed that 70% of the most common aphid, peach potato aphids (Myzus persicae) carry it. Work carried out at Brooms Barn a decade ago, showed a 30% yield penalty where levels of the virus were high and infection occurred early in the crop’s life. Since 2015, plant breeders Limagrain has been monitoring levels of TuYV in non-resistant or susceptible crops across the whole of Europe, including the UK. Leaf samples are taken both in the spring and autumn and tested using the standard Elisa test. “We’ve mapped the incidence of TuYV from the UK to Ukraine and seen it build over the years,” notes William Charlton, arable marketing manager for Limagrain. “We’re getting to a situation where TuYV is now endemic across Europe, and no longer confined to hotspots.” Sampling is carried out twice during the growing season, with an initial small-scale survey conducted in the autumn,…
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