All entries for July 2016

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; Simon Jackson, Allium & Brassica Agronomy Ltd.

Angela Hambidge : 12 Jul 2016 13:44 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Update on Rothamsted Suction Trap captures – week ending 3 July

A new edition of the Rothamsted Insect Survey Aphid Bulletin has been published (week ending 3rd July). The latest edition of AHDB APHID News is here.

• The currant-lettuce aphid (Nasonovia ribisnigri) was absent.
• The willow ̶ carrot aphid numbers fell at all sites and nowhere were double figures recorded.
• Numbers of parsnip aphids, Cavariella pastinaceae (Newcastle 2; Preston 2) and Cavariella theobaldi (Newcastle 1), are very low
• Numbers of the peach–potato aphid crashed with many sites not recording any numbers at all.
• The potato aphid was recorded as singletons at three sites.
• The cabbage aphid was only recorded at Wellesbourne. This is proving to be a radically different year to 2015.
• Starcross is no longer a hotspot for the black bean aphid. Across the network low numbers of this aphid were recorded.
• Despite low aphid numbers on the wing, prudence is needed. It might well be the case that healthy aphid populations are present on the host. Crop inspection is still recommended.

Rosemary Collier : 08 Jul 2016 16:45 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Since last Tuesday we have captured:

In pheromone traps (2 per species):

• Turnip moth = 1
• Silver Y moth = 0
• Cabbage moth = 0
• Diamond-back moth = 4

On 3 sticky traps:

• Carrot fly = 1 (in first sowing of carrots) and 8 (in second sowing)

In 3 water traps:

• Cabbage root fly males = 14
• Cabbage root fly females = 40
• Bean seed flies = 96
• Flea beetles = 12
• Pollen beetles = 476
• Cabbage stem weevils = 0
• Small white butterfly = 2

Cabbage root fly eggs = 101 (15 new plants)

Rosemary Collier : 08 Jul 2016 16:37 |  Comments (0) |  Close comments |  Report a problem

Pest update for Wellesbourne on 5th July

Since last Friday we have captured:

In pheromone traps (2 per species):

• Turnip moth = 3
• Silver Y moth = 0
• Cabbage moth = 0
• Diamond-back moth = 0

On 3 sticky traps:

• Carrot fly = 6 (in first sowing of carrots) and 14 (in second sowing)

In 3 water traps:

• Cabbage root fly males = 10
• Cabbage root fly females = 55
• Bean seed flies = 86
• Flea beetles = 67
• Pollen beetles = 1053
• Cabbage stem weevils = 0
• Small white butterfly = 1

Cabbage root fly eggs = 84 (15 new plants)

Rosemary Collier : 06 Jul 2016 14:41 |  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; Simon Jackson, Allium & Brassica Agronomy Ltd.

Diana Katschnig : 05 Jul 2016 12:43 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Latest update on Rothamsted suction trap captures

A new edition of the Rothamsted Insect Survey Aphid Bulletin has been published (week ending 26th June). The latest edition of AHDB APHID News is here.

• Peach-potato aphids were captured at 12 sites but numbers were considerably less than last week at sites towards the south.
• The cabbage aphid was caught at 5 sites, but in low numbers (maximum 8 at Hereford).
• Willow ̶carrot aphids were caught at 12 sites but, compared with the previous week, fewer were caught at all sites - with the exception of Newcastle.
• The pea aphid was caught at 9 sites, with highest numbers at Broom's Barn (14).
• Starcross continues as a hotspot for black bean aphids (28) with few (maximum 2) captured elsewhere.
• A single currant-lettuce aphid (Nasonovia ribisnigri) was caught at Kirton.
• Numbers of parnsip aphids (Cavariella pastinaceae and Cavariella theobaldi) were very low.
  

Rosemary Collier : 01 Jul 2016 20:21 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Since last Tuesday we have captured:

In pheromone traps (2 per species):

• Turnip moth = 3
• Silver Y moth = 1
• Cabbage moth = 0
• Diamond-back moth = 2

On 3 sticky traps per plot:

• Carrot fly = 7 (in first sowing of carrots) and 7 (in second sowing)

In 3 water traps:

• Cabbage root fly males = 2
• Cabbage root fly females = 12
• Bean seed flies = 50
• Flea beetles = 9
• Pollen beetles = 482
• Cabbage stem weevils = 2

Cabbage root fly eggs = 35 (15 plants)

Rosemary Collier : 01 Jul 2016 15:24 |  Comments (0) |  Close comments |  Report a problem