All entries for Friday 04 August 2017
August 04, 2017
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.
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.
The proportion of peach potato aphid (M. persicae) carrying Turnip yellows virus (TuYV)
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.