All entries for Friday 21 June 2019

June 21, 2019

AHDB Aphid News

The latest edition of AHDB Aphid Newshas been released for the week ending 16th June.

  • Peach–potato aphids decreased to half of that of last week, but with numbers still rising at sites in Northern Britain, as well as at Starcross.
  • Potato aphid numbers also halved across much of Britain, apart from Dundee, Newcastle and Kirton
  • Cabbage aphid numbers increased at five sites, but total numbers are down to a third of last week.
  • Single currant–lettuce aphids were captured at Rothamsted and Starcross.
  • Willow–carrot aphid numbers declined to around 40% of last week across all sites, except Starcross
  • Pea aphid numbers increased at seven sites, reaching double figures at three.
  • Black bean aphid numbers have increased substantially at seven sites, with a hotspot at Silwood Park.

Pest update from Wellesbourne

When the water traps in the swede plot were checked today there were:

  • 4 male and 3 female cabbage root flies
  • 25 bean seed flies
  • 0 flea beetles
  • 3650 pollen beetles
  • 25 cabbage stem weevils
  • 0 cabbage stem flea beetles
  • 0 cabbage seed weevils

There were 15 carrot flies on the 3 sticky traps in the new plot for 2019.

59 cabbage root fly eggs were laid between 18 and 21 June (around 15 plants).

6 diamond-back moths and 1 turnip moth were captured. No moths were captured in our other pheromone traps (silver Y moth, cabbage moth, diamond-back moth). There are 2 traps for each species.

We also caught 12 diamond-back moths on 6 carrot fly traps, 3 of which are in our carrots (above) and 3 are in the swede plot and are baited with a pheromone lure (experimental).


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  • Update – Wellesbourne, 09–15/10/2017, Suction, 12 caught, 0% carrying TuYV Kirton, 09–15/10/2017, Su… by Angela Hambidge on this entry
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  • Update – Wellesbourne 02 – 08/10/2017 Suction, 11 caught, 14% carrying TuYV 09 – 12/10/2017 YWT, 1 c… by Angela Hambidge on this entry
  • Update – Wellesbourne 11/9 – 17/9/2017 Suction trap 1 aphid 0% carrying TuYV Wellesbourne 21/9 – 25/… by Angela Hambidge on this entry
  • Update – Kirton, Lincolnshire 28/8–03/09/2017 Suction trap 4 aphids 33% carrying TuYV Spalding, Linc… by Angela Hambidge on this entry

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