Aphid News

AHDB Aphid News provides regional information on aphid species and numbers. Download the latest edition below.

AHDB Aphid News provides regional information on aphid species and numbers. It is emailed weekly (Friday) during the aphid flight period (typically, April to November). The information can be used to help time treatments better, reduce harm to beneficial insects and lower the risk of selection for insecticide resistance by reducing unnecessary or poorly timed sprays.

The aphid data is gathered by the Rothamsted/SASA suction-trap network and the FERA yellow water-pan trap network.

The suction trap network focuses on aphid species of importance to cereals and oilseeds crops. The 12.2m tall traps suck in air continuously and are emptied daily in spring, summer and autumn (weekly in winter). Aphid species are then identified and counted at Rothamsted Research and SASA (Gogarbank suction trap).

The data published within Aphid News is based on aphids trapped in a particular ‘Bulletin Week’ (which runs from Monday to Sunday). For each aphid species, tables are used to show the total number caught at each suction trap site – both for the current Bulletin Week and the accumulated totals for the year. For selected species, numbers for the same period last year are also shown, along with the long-term (10-year) average. Data can also be viewed at insectsurvey.com. The yellow water-pan trap network looks at a wider set of aphid species, including those that affect potato and field vegetable crops.

As Aphid News is based on data collected in the previous week, information should only be used to supplement in-field observations.

March forecasts

Suction trap aphid data and weather data can be used to forecast the start of aphid flights. Although there is considerable uncertainty associated with actual first flight dates at specific sites, the forecasts provide an indication of how early or late flights will take place, compared with an ‘average’ season. It is important to note that some aphids overwinter in crops and are likely to be present before aphid flights commence.

2019 forecasts

First aphid flights could be around two weeks earlier than average. This is mainly due to the period of unseasonably warm weather at the end of February.

Aphid News – Cereal aphid forecasts 2019

Aphid News – Brassica and potato aphid forecasts 2019

Sign up

To sign up to receive AHDB Aphid News, visit ahdb.org.uk/keeping-in-touch


Historic aphid data can be accessed from the Rothamsted Research Insect Survey page.

Further information

AHDB Cereals & Oilseeds aphid page AHDB Horticulture Pest Bulletin AHDB Potatoes yellow water traps Insecticide Resistance Action Group (includes aphid sampling protocol) Other AHDB aphid information

How aphids are caught and counted

Suction trap locations

(IV) Inverness. (D) Dundee. (G) Gogarbank. (Ay) Ayr. (N) Newcastle. (Y) York. (P) Preston. (KII) Kirton. (BB) Broom's Barn. (We) Wellesbourne. (H) Hereford. (RT) Rothamsted Tower. (Wr) Writtle. (SP) Silwood Park. (EM) East Malling. (SX) Starcross.

Virus management

The key period for virus transmission by aphids to cereals and oilseed rape is in the autumn. Find out more about virus transmission risk.