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Preliminary AHDB figures show 35% of aphids tested in autumn 2026 carry barley yellow dwarf virus, up from a 2020-24 average of 22.3% but nearly unchanged from 34% in autumn 2025. AHDB stressed that this measures virus prevalence in aphids, not the share of cereal crops infected.
Elevated virus pressure could cut UK wheat and barley yields if infections occur early, though the impact on global prices is limited since the figures do not show actual crop infection rates.
farminguk.comFarmingUK TeamNov 2, 2026After 14 past disease events, Wheat (SRW) moved a median -0.3% over 5 sessions (29% higher; middle half -0.7% to +0.5%), and -0.8% over 20.
Not enough comparable past events yet for a historical read.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.
