All entries for October 2017

October 31, 2017

Pest update from Wellesbourne

Between Friday and today we found the following:

On 3 sticky traps:

  • 13 carrot flies

In 3 water traps in a plot of swedes.

  • 0 male cabbage root fly and 1 female
  • 1 bean seed fly
  • 5 pollen beetles
  • 1 cabbage stem flea beetle

We have stopped sampling for cabbage root fly eggs.

We caught 4 silver Y moths in our pheromone traps. It is unlikely that silver Y moths caught at this time of year will cause any damage to crops. More information on what they do in winter can be found here: http://www.pnas.org/content/109/37/14924.full.pdf


October 30, 2017

AHDB Aphid News

The latest edition of AHDB Aphid News has been published.

  • Peach–potato aphids (Myzus persicae) were caught at eight suction trap sites and increased in number at five. The highest numbers caught were from the suction trap sites at Kirton (29) and Preston (28).
  • No mealy cabbage aphids (Brevicoryne brassicae) were caught this week at the suction trap sites.
  • The willow-carrot aphid (Cavariella aegopodii) was caught in six suction traps this week. Eight male individuals were caught at York suggesting that the autumn migration back to willows is continuing.

October 27, 2017

Pest update from Wellesbourne

Between Tuesday (24th) and Thursday (26th) we found the following:

On 3 sticky traps:

  • 5 carrot flies

In 3 water traps in a plot of swedes.

  • 3 male cabbage root fly and 0 females
  • 11 bean seed flies
  • 5 pollen beetles
  • 5 cabbage stem weevils

We have stopped sampling for cabbage root fly eggs.

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


October 26, 2017

Pest update from Wellesbourne

Between Friday (20th) and Tuesday (24th) we found the following:

On 3 sticky traps:

  • 15 carrot flies

In 3 water traps in a plot of swedes.

  • 1 male cabbage root fly and 1 female
  • 41 bean seed flies
  • 10 pollen beetles
  • 1 flea beetle

We have stopped sampling for cabbage root fly eggs.

We caught 2 silver Y moths and 2 turnip moths n 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

09/10-15/10/2017

Suction trap

12

0%

16/10-23/10/2017

Yellow water traps

2

50%

Kirton, Lincolnshire

09/10-15/10/2017

Suction trap

21

38%

Spalding, Lincolnshire

16/10-23/10/2017

Yellow water traps

3

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.


October 20, 2017

AHDB Aphid News

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

  • Peach–potato aphids (Myzus persicae) were caught at eight suction trap sites and increased in number at five. The highest numbers caught were from Kirton (29) and Preston (28).
  • No mealy cabbage aphids (Brevicoryne brassicae) were caught this week.
  • The willow-carrot aphid (Cavariella aegopodii) was caught in six traps this week. Eight male individuals were caught from York, suggesting that autumn migration back to willows is continuing.

Pest update from Wellesbourne

Between Tuesday and today we found the following:

On 3 sticky traps:

  • 7 carrot flies

In 3 water traps in a plot of swedes.

  • 6 male cabbage root flies and 5 females
  • 10 bean seed flies
  • 4 pollen beetles
  • 1 cabbage stem weevil
  • 1 flea beetle

We have stopped sampling for cabbage root fly eggs.

We caught 1 silver Y moth iand 3 turnip moths n our pheromone traps.


October 19, 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

02/10-08/10/2017

Suction trap

7

TBA

09/10-12/10/2017

Yellow water traps

10

TBA

12/10-16/10/2017

Yellow water traps

1

TBA

Kirton, Lincolnshire

02/10-08/10/2017

Suction trap

2

TBA

Spalding, Lincolnshire

09/10-12/10/2017

Yellow water traps

1

TBA

12/10-16/10/2017

Yellow water traps

8

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.


October 18, 2017

Pest update from Wellesbourne

Between Friday and yesterday we found the following:

On 3 sticky traps:

  • 26 carrot flies

In 3 water traps in a plot of swedes.

  • 12 male cabbage root flies and 0 females
  • 24 bean seed flies
  • 7 pollen beetles
  • 1 cabbage stem weevil
  • 1 cabbage stem flea beetle

We have stopped sampling for cabbage root fly eggs.

We caught 2 silver Y moths iand 2 turnip moths n our pheromone traps.


October 13, 2017

AHDB Aphid News

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

  • Peach–potato aphids (Myzus persicae) were caught at six suction trap sites and increasing in number at the southernmost sites. The highest number caught was at Wye (47).
  • A single Mealy cabbage aphid (Brevicoryne brassicae) was caught at Wye this week.
  • The willow-carrot aphid (Cavariella aegopodii) was caught in seven suction traps, being found additionally at Broom’s Barn, Wellesbourne and Starcross this week. As well as this; four male individuals were caught at Broom’s Barn this week suggesting that the autumn migration back to willows is continuing.

October 2017

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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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