All entries for September 2017

September 29, 2017

AHDB Aphid News

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

  • Peach–potato aphids (Myzus persicae) were caught and increasing in number at nine suction trap sites. The highest number caught was from the suction trap at Wellesbourne (23).
  • Mealy cabbage aphids (Brevicoryne brassicae) were caught at Kirton (5) and Writtle (1) suction trap sites.
  • Monitoring brassica crops for aphids would be useful.
  • The willow-carrot aphid (Cavariella aegopodii) was caught in five suction-traps this week. numbers have increased most noticeably at Dundee and to a lesser extent at York suction trap sites. A single male individual was caught from Dundee suggesting that the start of the autumn migration back to willows to overwinter may be occurring.

Pest update from Wellesbourne

Between Tuesday and today we found the following:

On 3 sticky traps:

  • 68 carrot flies

In 3 water traps in a plot of swedes.

  • 37 male cabbage root flies and 13 females
  • 13 bean seed flies
  • 5 pollen beetles
  • 2 flea beetles
  • 2 cabbage stem weevils
  • 1 cabbage seed weevil
  • 7 cabbage stem flea beetles

We recovered 1 cabbage root fly egg from the soil around 15 cauliflower plants.

We caught 2 turnip moths in our pheromone traps.


September 28, 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

11/9-17/9/2017

Suction trap

1

TBA

18/9-21/9/2017

Yellow water traps

0

-

21/9-25/9/2017

Yellow water traps

3

TBA

Kirton, Lincolnshire

11/9-17/9/2017

Suction trap

0

-

Spalding, Lincolnshire

18/9-21/9/2017

Yellow water traps

0

-

21/9-25/9/2017

Yellow water traps

3

TBA

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.


September 26, 2017

Pest update from Wellesbourne

Between Friday and today we found the following:

On 3 sticky traps:

  • 100 carrot flies

In 3 water traps in a plot of swedes.

  • 36 male cabbage root flies and 13 females
  • 26 bean seed flies
  • 10 pollen beetles
  • 2 flea beetles
  • 1 cabbage stem weevil
  • 1 cabbage sten flea beetle

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

We caught no 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. persicae caught

% of those tested carrying TuYV

Wellesbourne, Warwickshire

04/9-10/9/2017

Suction trap

4

0%

11/9-14/9/2017

Yellow water traps

0

-

14/9-18/9/2017

Yellow water traps

1

0%

Kirton, Lincolnshire

04/9-10/9/2017

Suction trap

6

83%

Spalding, Lincolnshire

11/9-14/9/2017

Yellow water traps

1

0%

14/9-18/9/2017

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.


September 23, 2017

AHDB Aphid News

The latest edition of AHDB Aphid News has been published.

Single peach–potato aphids (Myzus persicae) were caught at Wellesbourne and Wye suction trap sites.

Single Mealy cabbage aphids (Brevicoryne brassicae) were caught at Gogarbank and Wye suction trap sites.

The willow-carrot aphid (Cavariella aegopodii) was caught in four suction-traps this week. No male individuals were caught suggesting that the start of the autumn migration back to willows to overwinter has not yet begun.


September 22, 2017

Update from Wellesbourne

Between Tuesday and today we found the following:

On 3 sticky traps:

  • 70 carrot flies

In 3 water traps in a plot of swedes.

  • 14 male cabbage root flies and 9 females
  • 18 bean seed flies
  • 2 pollen beetles
  • 3 flea beetles

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

We caught 1 turnip moth in our pheromone traps.


September 19, 2017

Update from Wellesbourne

Between Friday and today we found the following:

On 3 sticky traps:

  • 50 carrot flies

In 3 water traps in a plot of swedes.

  • 17 male cabbage root flies and 10 females
  • 26 bean seed flies
  • 3 pollen beetles
  • 8 flea beetles
  • 5 cabbage stem flea beetles
  • 1 cabbage stem weevil
  • 1 small white butterfly

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

We caught 1 turnip moth in our pheromone traps.


September 15, 2017

AHDB Aphid News

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


  • Black bean aphids were caught at four sites, with the highest number being caught at Preston (6) this week in the ST (suction traps).
  • Peach・potato aphids (Myzus persicae) were caught at five sites this bulletin week in the ST.
  • Single mealy cabbage aphids (Brevicoryne brassicae) were caught at Kirton and Wellesbourne in the ST this bulletin week.
  • No currant-lettuce aphid (Nasonovia ribisnigri) was caught in the ST this week.
  • Willow ̶ carrot aphids (Cavariella aegopodii) were caught at Dundee (19), Kirton (2) and Wellesbourne (1) this week.
  • The parsnip aphid (Cavariella pastinacae) was caught at Newcastle (5), York (2) and Preston (2) this week.
  • The parsnip aphid (Cavariella theobaldi) was caught at Dundee (1), York (1) and Writtle (1) this week.

Pest update from Wellesbourne

Between Tuesday and today we found the following:

On 3 sticky traps:

  • 21 carrot flies

In 3 water traps in a plot of swedes.

  • 37 male cabbage root flies and 19 females
  • 43 bean seed flies
  • 3 pollen beetles
  • 9 flea beetles
  • 1 small white butterfly

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

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


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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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