August 18, 2017

AHDB Aphid News

The latest edition of AHDB Aphid News has just been released.


  • Single black bean aphids were caught at Dundee and Newcastle this week in the STs (suction traps). However, none was caught in the YWT (yellow water traps).
  • Two peach–potato aphids (Myzus persicae) were caught in England at the Kirton ST this week, as well as a single peach– potato aphid in Scotland at Dundee and Gogarbank STs and a single peach–potato aphid caught in the YWT.
  • A single mealy cabbage aphid (Brevicoryne brassicae) was caught at the Newcastle ST this w
  • A single currant-lettuce aphid (Nasonovia ribisnigri) was caught at the Wye ST this week.
  • Single willow ̶ carrot aphids (Cavariella aegopodii) were caught at Dundee and Newcastle this week.
  • The parsnip aphid (Cavariella pastinacae) was caught at Dundee (2), Broom’s Barn (1), Hereford (1), Kirton (1), Newcastle (1), Starcross (2) and Wye (1) this week.
  • The parsnip aphid (Cavariella theobaldi) was caught at Gogarbank (1), Broom’s Barn (2) and Silwood Park (1) this week.



Pest update from Wellesbourne

Between Tuesday and today we caught:

On 3 sticky traps:

  • 8 carrot flies

In 3 water traps in a plot of swedes.

  • 178 male cabbage root flies and 46 females
  • 33 bean seed flies
  • 1 pollen beetle
  • 48 flea beetles
  • 2 cabbage stem weevils
  • 1 cabbage stem flea beetle

We also recovered 34 cabbage root fly eggs from the soil around 15 cauliflower plants (new plants).

We caught 2 diamond-back moths in our pheromone traps


August 16, 2017

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. persicae caught

% of those tested carrying TuYV

Wellesbourne, Warwickshire

31/7-06/8/2017

Suction trap

1

TBA

07/8-10/8/2017

Yellow water traps

2

TBA

10/8-14/8/2017

Yellow water traps

0

-

Kirton, Lincolnshire

31/7-06/8/2017

Suction trap

1

TBA

Spalding, Lincolnshire

07/8-10/8/2017

Yellow water traps

0

-

10/8-14/8/2017

Yellow water traps

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.


August 15, 2017

Pest update from Wellesbourne

Between Friday and today we caught:

On 3 sticky traps:

  • 11 carrot flies

In 3 water traps in a plot of swedes.

  • 197 male cabbage root flies and 37 females
  • 14 bean seed flies
  • 13 pollen beetles
  • 54 flea beetles
  • 4 cabbage stem weevils
  • 1 cabbage stem flea beetles

We also recovered 10 cabbage root fly eggs from the soil around 15 cauliflower plants (new plants).

We caught 1 diamond-back moth in our pheromone traps


August 12, 2017

AHDB Aphid News

The latest edition of AHDB Aphid News is available.

Monitoring crops is still advised, however the total numbers of aphids have generally decreased this week in the ST (suction trap) network.

  • Black bean aphids were caught in single figures at five sites this week in the ST as well as in low numbers across Scotland and Northern England in YWT (yellow water traps).
  • Single peach–potato aphids (Myzus persicae) were caught at Kirton and Wellesbourne this week, as well as two being caught at Dundee. Peach–potato aphids were also found in low numbers in the YWT across Scotland.
  • No mealy cabbage aphids (Brevicoryne brassicae) were caught at this week.
  • No currant-lettuce aphids (Nasonovia ribisnigri) was caught in the ST this week.
  • Two willow ̶ carrot aphids (Cavariella aegopodii) were caught at Dundee this week.
  • The parsnip aphids (Cavariella pastinacae) were caught at Broom’s Barn (2), Newcastle (1), Preston (2), and Rothamsted (3) this week.
  • The parsnip aphid (Cavariella theobaldi) was caught at Broom’s Barn (2) and Kirton (1) this week.

Pest update from Wellesbourne

Between Tuesday and today we caught:

On 3 sticky traps:

  • 20 carrot flies

In 3 water traps in a plot of swedes.

  • 112 male cabbage root flies and 36 females
  • 40 bean seed flies
  • 15 pollen beetles
  • 45 flea beetles
  • 2 cabbage stem weevils
  • 2 cabbage stem flea beetles

We also recovered 0 cabbage root fly eggs from the soil around 15 cauliflower plants (new plants).

We caught 1 turnip moth and 2 silver Y moths in our pheromone traps


August 10, 2017

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. persicae caught % of those tested carrying TuYV
Wellesbourne, Warwickshire
24-30/07/2017 Suction trap 0 0%
31/07-03/08/2017 Yellow water traps 1 TBA
03-07/08/2017 Yellow water traps 2 TBA
Kirton, Lincolnshire
24-30/07/2017 Suction trap 0 0%
Spalding, Lincolnshire
31/07-03/08/2017 Yellow water traps 0 0%
03-07/08/2017 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.


August 08, 2017

Pest update from Wellesbourne

Between Friday and today we caught:

On 3 sticky traps:

  • 40 carrot flies

In 3 water traps in a plot of swedes.

  • 80 male cabbage root flies and 21 females
  • 24 bean seed flies
  • 49 pollen beetles
  • 45 flea beetles
  • 7 cabbage stem weevils
  • 3 cabbage stem flea beetles

We also recovered 1 cabbage root fly eggs from the soil around 15 cauliflower plants (new plants).

We caught 1 silver Y moth in our pheromone traps.


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.


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