The maps show where flying aphids (M.persicae ) are currently being detected. Growers should interpret the maps as indicating where extra vigilance is required to reduce the risk of virus yellows. Growers should inspect growing crops regularly and use aphicide sprays when threshold population (1 green wingless aphid per 4 plants) is detected. See BBRO Reference Book for more details.
Aphid numbers for the week commencing 17/6/19:
Total Myzus Persicae: 1558
Total Macrosiphum euphorbiae: 6
Total Ladybirds: 75
One BMYV positive aphid has been found from the 6/6/19 catch at Holbeach Hurn.
Total aphids caught to date: 36, 945
7375 of these aphids have been tested to date, of which 36 have been positive for BMYV.
Please note: traps where more than 20 M.persicae have been identified, only 20 will be randomly selected for virus testing at this stage.