All entries for May 2017

Pest update from Wellesbourne

Between Friday and today we caught:

On 3 sticky traps in each of our carrot plots:

• 33 carrot flies - overwintered carrots
• 153 carrot flies - spring-sown carrots

In 3 water traps in a new plot of swedes.

• 0 male cabbage root flies and 1 female
• 15 bean seed flies
• 230 pollen beetles
• 142 flea beetles
• 15 cabbage stem weevils
• 39 cabbage seed weevils
• 2 cabbage stem flea beetles

We also recovered 28 cabbage root fly eggs from the soil around 15 cauliflower plants.

We set up pheromone traps for silver Y moth, diamond-back moth and turnip moth on 18th April and caught 1 diamond-back moth, 1 silver Y moth and 4 turnip moths (2 traps per species).

We have also caged some areas planted with narcissus in order to record emergence of large narcissus fly - four more caught today!

Rosemary Collier : 30 May 2017 18:55 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Between Tuesday and today we caught:

On 3 sticky traps in each of our carrot plots:

• 38 carrot flies - overwintered carrots
• 303 carrot flies - spring-sown carrots

In 4 water traps - 3 near our overwintered swede plot and 1 near some oil seed rape:

• 0 male cabbage root flies and 3 females
• 5 bean seed flies
• 467 pollen beetles
• 179 flea beetles
• 40 cabbage stem weevils
• 51 cabbage seed weevils
• 3 cabbage stem flea beetles

We also recovered 6 cabbage root fly eggs from the soil around 15 cauliflower plants.

We set up pheromone traps for silver Y moth, diamond-back moth and turnip moth on 18th April and caught 1 diamond-back moth and 5 turnip moths (2 traps per species).

We have also caged some areas planted with narcissus in order to record emergence of large narcissus fly - two more caught today!

Rosemary Collier : 26 May 2017 22:13 |  Comments (0) |  Close comments |  Report a problem

AHDB Aphid News

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

• Peach–potato aphids (Myzus persicae) have been caught throughout much of England in both the suction traps and the yellow water traps. Tests show these migrants are carrying high levels of Turnip yellows virus.
• Low numbers of the mealy cabbage aphid were caught less widely in both suction traps and the yellow water traps.
• Currant-lettuce aphids (Nasonovia ribisnigri) were caught at Writtle and Wye this week.
• The willow–carrot aphid is flying throughout England, with numbers increasing significantly at most suction-trap sites and with highest numbers at York (208), Kirton (184), Broom’s Barn (162) and Hereford (245).
• Numbers of parsnip aphids also increased, particularly in central England
• A few black bean aphids have been caught, but no field reports yet.

Rosemary Collier : 26 May 2017 15:26 |  Comments (0) |  Close comments |  Report a problem

Brassica aphids and virus News

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.

Angela Hambidge : 25 May 2017 12:40 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Between Friday and today we caught:

On 3 sticky traps in each of our carrot plots:

• 39 carrot flies - overwintered carrots
• 200 carrot flies - spring-sown carrots

In 4 water traps - 3 near our overwintered swede plot and 1 near some oil seed rape:

• 15 male cabbage root flies and 9 females
• 41 bean seed flies
• 1088 pollen beetles
• 99 flea beetles
• 8 cabbage stem weevils
• 6 cabbage seed weevils
• 4 cabbage stem flea beetles

We also recovered 9 cabbage root fly eggs from the soil around 15 cauliflower plants.

We set up pheromone traps for silver Y moth, diamond-back moth and turnip moth on 18th April and caught 1 diamond-back moth and 1 turnip moth (2 traps per species).

We have also caged some areas planted with narcissus in order to record emergence of large narcissus fly - two caughts today!

Rosemary Collier : 23 May 2017 16:29 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Between Tuesday and today we caught:

On 3 sticky traps in each of our carrot plots:

• 45 carrot flies - overwintered carrots
• 104 carrot flies - spring-sown carrots

We also recovered 16 cabbage root fly eggs from the soil around 15 cauliflower plants.

In the yellow water traps we caught:

• 17 male cabbage root flies and 13 females
• 45 bean seed flies
• 400 pollen beetles
• 56 flea beetles
• 9 cabbage stem weevils
• 4 cabbage seed weevils
• 1 cabbage stem flea beetle

Rosemary Collier : 19 May 2017 17:40 |  Comments (0) |  Close comments |  Report a problem

New edition of AHDB News published

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

• Peach・potato aphids (Myzus persicae) have been caught throughout much of England in the suction-traps and in the Midlands, East Anglia and the South West in the yellow water-pan traps. Tests show these migrants are carrying high levels of Turnip yellows virus.
• Low numbers of the mealy cabbage aphid were caught less widely in both suction and yellow water traps.
• Single currant-lettuce aphids (Nasonovia ribisnigri) were caught at Hereford and Rothamsted this week.
• The willow ̶carrot aphid was caught at twelve sites this week, with numbers increasing at 11 sites and highest numbers at Kirton (60) and Hereford (53).
• Numbers of parsnip aphids, particularly Cavariella theobaldi, also increased.



Rosemary Collier : 19 May 2017 16:29 |  Comments (0) |  Close comments |  Report a problem

Brassica aphids and virus News

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.

Angela Hambidge : 18 May 2017 12:36 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Between Friday and today we caught:

On 3 sticky traps in each of our carrot plots:

• 24 carrot flies - overwintered carrots
• 177 carrot flies - spring-sown carrots

In 4 water traps - 3 near our overwintered swede plot and 1 near some oil seed rape:

• 84 male cabbage root flies and 11 females
• 60 bean seed flies
• 561 pollen beetles
• 11 flea beetles
• 4 cabbage seed weevils

We also recovered 36 cabbage root fly eggs from the soil around 15 cauliflower plants.

We set up pheromone traps for silver Y moth, diamond-back moth and turnip moth on 18th April and caught 1 silver Y moth (2 traps).

We have also caged some areas planted with narcissus in order to record emergence of large narcissus fly - none so far.

Rosemary Collier : 16 May 2017 21:19 |  Comments (0) |  Close comments |  Report a problem

Small moth migration in the last few days

As predicted on Twitter by @MigrantMothUK there has been a small inward migration of silver Y moth and diamond-back moth during the last few days. Most sightings were in southern England but one diamond-back moth at least made it to Orkney. There might be another influx on Monday night.

Rosemary Collier : 14 May 2017 21:04 |  Comments (0) |  Close comments |  Report a problem