All entries for July 2016

Update on Rothamsted suction trap captures – week ending 24th July

A new edition of the Rothamsted Insect Survey Aphid Bulletin has been published (week ending 24th July). The latest edition of AHDB APHID News is here.

• Numbers of peach–potato aphid (Myzus persicae) increased very slightly on last week, with highest numbers at Hereford. 
• The numbers of willow ̶carrot aphid (Cavariella aegopodii) flying are now very low everywhere. 
• A single currant-lettuce aphid (Nasonovia ribisnigri) was caught at Starcross. 
• Numbers of parsnip aphids are low (Cavariella pastinaceae 2 at Newcastle, 3 at Kirton, 1 at Broom’s Barn and 2 at Starcross, but no Cavariella theobaldi). 
• Numbers of the black bean aphid (Aphis fabae) are conspicuously low, both for the time of year and compared to the large migrations seen in 2015. 
• Numbers of the pea aphid increased a little at 10 sites with highest numbers at Kirton, Broom’s Barn and Starcross.
  

Rosemary Collier : 30 Jul 2016 07:34 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Since Tuesday we captured:

In pheromone traps (2 per species):

• Turnip moth = 0
• Silver Y moth = 0
• Cabbage moth = 0
• Diamond-back moth = 10

On 3 sticky traps:

• Carrot fly = 5 (in first sowing of carrots) and 40 (in second sowing)

In 3 water traps:

• Cabbage root fly males = 3
• Cabbage root fly females = 11
• Bean seed flies = 56
• Flea beetles = 14
• Pollen beetles = 35
• Small white butterfly = 0
• Large white butterfly = 0
• Cabbage stem weevil = 7

Cabbage root fly eggs = 309 (15 plants)

Rosemary Collier : 29 Jul 2016 14:42 |  Comments (0) |  Close comments |  Report a problem

Pest update for Wellesbourne

Since Friday we captured:

In pheromone traps (2 per species):

• Turnip moth = 0
• Silver Y moth = 0
• Cabbage moth = 0
• Diamond-back moth = 5

On 3 sticky traps:

• Carrot fly = 12 (in first sowing of carrots) and 32 (in second sowing)

In 3 water traps:

• Cabbage root fly males = 9
• Cabbage root fly females = 25
• Bean seed flies = 57
• Flea beetles = 44
• Pollen beetles = 32
• Small white butterfly = 7
• Large white butterfly = 0
• Cabbage stem weevil = 8

Cabbage root fly eggs = 519 (15 new plants)

Rosemary Collier : 26 Jul 2016 19:36 |  Comments (0) |  Close comments |  Report a problem

Pest update for Friday, 22nd July

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 = 8

On 3 sticky traps:

• Carrot fly = 27 (in first sowing of carrots) and 32 (in second sowing)

In 3 water traps:

• Cabbage root fly males = 0
• Cabbage root fly females = 63
• Bean seed flies = 15
• Flea beetles = 47
• Pollen beetles = 64
• Small white butterfly = 2
• Large white butterfly = 0
• Cabbage stem weevil = 4

Cabbage root fly eggs = 278 (15 new plants)

Rosemary Collier : 23 Jul 2016 11:39 |  Comments (0) |  Close comments |  Report a problem

Update on Rothamsted suction trap captures – week ending 17th July

A new edition of the Rothamsted Insect Survey Aphid Bulletin has been published (week ending 17th July). The latest edition of AHDB APHID News is here.

• Numbers of peach–potato aphid (Myzus persicae) and the potato aphid (Macrosiphum euphorbiae) remain very low this week.
• The numbers of willow ̶carrot aphid (Cavariella aegopodii) flying are now very low everywhere.
• A single currant-lettuce aphid (Nasonovia ribisnigri) was caught at Rothamsted.
• Numbers of parsnip aphids (Cavariella pastinaceae 1 at Preston and 3 at Starcross but no Cavariella theobaldi), are also very low.
• Numbers of the black bean aphid (Aphis fabae) are conspicuously low, both for the time of year and compared to the large migrations seen in 2015.
  

Rosemary Collier : 22 Jul 2016 22:10 |  Comments (0) |  Close comments |  Report a problem

Pest update for Tuesday, 19th July

Since last Friday we have captured:

In pheromone traps (2 per species):

• Turnip moth = 1
• Silver Y moth = 0
• Cabbage moth = 0
• Diamond-back moth = 8

On 3 sticky traps:

• Carrot fly = 20 (in first sowing of carrots) and 23 (in second sowing)

In 3 water traps:

• Cabbage root fly males = 2
• Cabbage root fly females = 29
• Bean seed flies = 29
• Flea beetles = 10
• Pollen beetles = 61
• Small white butterfly = 4
• Large white butterfly = 0

Cabbage root fly eggs = 257 (15 new plants)

Rosemary Collier : 20 Jul 2016 06:26 |  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; Simon Jackson, Allium & Brassica Agronomy Ltd.

Angela Hambidge : 19 Jul 2016 11:09 |  Tags: Aphid Tuyv |  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 = 4
• Silver Y moth = 0
• Cabbage moth = 0
• Diamond-back moth = 5

On 3 sticky traps:

• Carrot fly = 5 (in first sowing of carrots) and 2 (in second sowing)

In 3 water traps:

• Cabbage root fly males = 0
• Cabbage root fly females = 22
• Bean seed flies = 28
• Flea beetles = 4
• Pollen beetles = 174
• Cabbage stem weevils = 2
• Small white butterfly = 4
• Large white butterfly = 2

Cabbage root fly eggs = 149 (15 new plants)

Rosemary Collier : 15 Jul 2016 16:54 |  Comments (0) |  Close comments |  Report a problem

Update on Rothamsted Suction Trap captures – week ending 10 July

A new edition of the Rothamsted Insect Survey Aphid Bulletin has been published (week ending 10th July). The latest edition of AHDB APHID News is here.

• Numbers of peach–potato aphid (Myzus persicae) and the potato aphid (Macrosiphum euphorbiae) remain very low this week.
• The numbers of willow ̶carrot aphid (Cavariella aegopodii) flying are now very low everywhere.
• Single currant-lettuce aphids (Nasonovia ribisnigri) were caught at Elgin and Starcross.
• Numbers of parsnip aphids, Cavariella pastinaceae (1 at Newcastle) and Cavariella theobaldi (1 at Wellesbourne) are also very low.
• Numbers of the black bean aphid (Aphis fabae) are conspicuously low, both for the time of year and compared to the large migrations seen in 2015. The threshold for black bean aphid (Aphis fabae) in field and broad beans is 10% colonisation at early flowering and 5% infested to prevent virus transmission. There have been no field reports of crops requiring treatment so far.
• Pea aphid (Acyrthosiphon pisum) numbers are low in trap catches compared to 10-year means for this time of year. Field reports indicate natural enemies are doing a good job, especially hoverfly larvae. Combining peas should be sprayed when around 20% of plants are infested and vining peas when 15% are infested. The vining pea harvest has already begun in Lincolnshire.

Rosemary Collier : 15 Jul 2016 15:10 |  Comments (0) |  Close comments |  Report a problem

Update from Wellesbourne

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 = 4

On 3 sticky traps:

• Carrot fly = 5 (in first sowing of carrots) and 6 (in second sowing)

In 3 water traps:

• Cabbage root fly males = 12
• Cabbage root fly females = 87
• Bean seed flies = 124
• Flea beetles = 13
• Pollen beetles = 203
• Cabbage stem weevils = 0
• Small white butterfly = 3

Cabbage root fly eggs = 94 (15 new plants)

Rosemary Collier : 12 Jul 2016 17:07 |  Comments (0) |  Close comments |  Report a problem