Black Bean Aphid (Aphis fabae) Forecast 2026

The timing of the migration ofAphis fabaeat any location can be predicted using the mean air temperature and the site’s latitude and longitude. A range of equations were produced in AHDB Project FV 407adescribing the relationships between the dates of first, 10% and 50% capture of aphids in suction traps and the mean air temperature over different periods and site latitude and longitude.

Forecast based on air temperatures (January-April)

	First	10% aphids	50% aphids
Cornwall
Kent
Suffolk
Wellesbourne
Norfolk
South Lincs
Nottingham
Lancashire
York
Scotland