AphidWatch
BBRO AphidWatch
BBRO's 2026 AphidWatch and Yellow Water Pan networks ceased on the 2nd of July.
Most sites in the network had reached the 16+ true leaf stage where it is no longer necessary to apply an aphicide. Sites where the crop was this developed are marked by a purple marker. Most other sites either were not reporting any presence of aphids, or very low numbers (below threshold).
It is believed that the migration of Myzus persicae is complete and beneficial insects and the plant's own resistance mechanisms will control any remaining aphids on most crops. However, remain vigilant and protect any crops which are less developed (i.e. two stage emergence).
Continue regular observations (20 plants/field, 2x a week) to see if/when your crop reaches the threshold for treatment with an aphicide: 5 aphids per 20 plants <12 true leaves, switching to 1 aphid per plant between 12-16 true leaves.
Comply with all timing application restrictions on any product labels. (e.g. Sivanto Prime must not be applied after 13 July)
Further info
Virus Yellows Forecast 2026
Rothamsted Research are forecasting the 2026 VY Risk at 62% (East - Bury St Edmunds, Cantley, Wissington) and 49% (North - Newark).
This risk is higher than 2025 but lower than 2024.
Early prediction of migration dates (as of 1st March) suggest migration as end of April (Eastern areas) or beginning of May (North). These may change due to the impact of weather conditions. Please see the latest Advisory Bulletin for updates.
Further details and guidance can be accessed through the attached forecast for each region and
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We are set up jointly by British Sugar plc and NFU Sugar
