All entries for Friday 04 August 2017

August 04, 2017

AHDB Aphid News

The latest edition of AHDB News has been published. This summarises captures for the week ending 30th July.

  • Black bean aphids were caught in single figures at four sites this week in the ST as well as across Scotland and Northern England in YWT (yellow-water traps) this week, with the highest number caught in the ST at Newcastle (3).
  • Single peach–potato aphids (Myzus persicae) were caught at Gogarbank, Broom’s Barn and Hereford this week. Tests show that up to 43% of these migrants are carrying Turnip yellows virus. Peach–potato aphids were also found in the YWT across Scotland.
  • A single mealy cabbage aphid (Brevicoryne brassicae) was caught at Wye this week.
  • A single currant-lettuce aphid (Nasonovia ribisnigri) was caught in the ST at Starcross this week.
  • Two willow ̶ carrot aphids (Cavariella aegopodii) were caught at Preston this week.
  • The parsnip aphid (Cavariella pastinacae) was caught at Broom’s Barn (1), Newcastle (4), Preston (2), Rothamsted (4), Wellesbourne (8), Wye (2) and York (4) this week.
  • A single parsnip aphid (Cavariella theobaldi) was caught at Starcross this week.

Pest update from Wellesbourne

Between Tuesday and today we caught:

On 3 sticky traps:

  • 91 carrot flies

In 3 water traps in a plot of swedes.

  • 28 male cabbage root flies and 11 females
  • 13 bean seed flies
  • 19 pollen beetles
  • 19 flea beetles
  • 2 cabbage stem weevils
  • 2 cabbage stem flea beetles

We also recovered 2 cabbage root fly eggs from the soil around 15 cauliflower plants (new plants).

We caught 2 silver Y moths in our pheromone traps.


Brassica aphids and virus news


The proportion of peach potato aphid (M. persicae) carrying Turnip yellows virus (TuYV)

Date Type of trap Numbers of M. persicaecaught % of those tested carrying TuYV
Wellesbourne, Warwickshire
17-23/07/2017 Suction trap 2 50%
24-27/07/2017 Yellow water traps 31 45%
27-31/07/2017 Yellow water traps 1 0%
Kirton, Lincolnshire
17-23/07/2017 Suction trap 1 0%
Spalding, Lincolnshire
24-27/07/2017 Yellow water traps 0 0%
27-31/07/2017 Yellow water traps 0 0%


Turnip yellows virus (TuYV), formerly known as Beet western yellows virus, is a very important pathogen of vegetable brassicas and oilseed rape. It is spread by the peach potato aphid (Myzus persicae).

This data is collected as part of project ‘Developing integrated approaches for pest and disease control in horticultural field crops’ with funding from the BBSRC Horticulture And Potato Initiative (HAPI).

Diana Katschnig and Angela Hambidge, Plant-Virus Interactions Group, University of Warwick; Alex Greenslade, Rothamsted Research & Rothamsted Insect Survey; Carl Sharp, Allium & Brassica Agronomy Ltd.


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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
  • Update Spalding 28/9 02/10/2017 YWT 12 caught, 25% carrying TuYV. by Angela Hambidge on this entry
  • 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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