All entries for June 2015

Aphid and TuYV News

Brassica virus and peach potato aphid update from Wellesbourne, Warwickshire:

• 04–08/06/2015, high numbers of M. persicae were caught (12 yellow water traps), 73% of those tested were carrying TuYV.
• 08-11/06/2015, 60 M. persicae were caught (12 yellow water traps), 73% of those tested were carrying TuYV.
• From the Rothamsted Insect Survey suction trap catch, 03-07/06/2015, 15 M. persicae were identified, 60% of these were carrying TuYV.

Brassica virus and peach potato aphid update from Kirton, Lincolnshire:

• 04–08/06/2015, 74 M. persicae were caught (12 yellow water traps), 76% of those tested were carrying TuYV.
• 08-11/06/2015, 13 M. persicae were caught (12 yellow water traps), 31% of these were carrying TuYV.
• From the Rothamsted Insect Survey suction trap catch, 03-07/06/2015, 14 M. persicae were identified, 71% of these were carrying 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 with funding from the BBSRC Horticulture And Potato Initiative (HAPI).

Diana Katschnig and Angela Hambidge, Plant-Virus Interactions Group, University of Warwick

Diana Katschnig : 19 Jun 2015 10:04 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Today we found:

• 0 male and 11 female cabbage root flies (3 water traps)
• 34 bean seed flies (3 traps)
• 10 carrot flies (3 traps) in our new carrots
• 5 cabbage root fly eggs (15 cauliflower plants)
• 7 turnip moths (2 traps)
• 4 diamond-back moths (2 traps)
• 1 silver Y moth (1 trap)
• 1 flea beetle (3 traps)

Rosemary Collier : 15 Jun 2015 16:53 |  Comments (0) |  Close comments |  Report a problem

Aphid bulletins

The latest editions of the Rothamsted Suction Trap Bulletin and AHDB Aphid News are attached. The information of interest to vegetable and salad growers is as follows. The information below relates to suction-trap samples collected during Bulletin Week 9: 01/6 – 07/6. The weather this bulletin week was several degrees warmer and aphid numbers in the suction-traps have significantly increased in response.

• Numbers of the peach–potato aphid (Myzus persicae) are building with highest numbers in eastern England.
• The potato aphid (Macrosiphum euphorbiae) was caught at eight sites this week in low numbers.
• Field reports indicate both peach–potato aphid and potato aphid in potatoes in Essex.
• Numbers of the willow ̶ carrot aphid (Cavariella aegopodii) have increasedat 12/14 sites this week, with highest numbers in eastern England.
• The mealy cabbage aphid (Brevicoryne brassicae) was caught at eight sites this week, with a first arrival at Wye (3/6). There were hotspots atWellesbourne (63), Kirton (35) and Writtle (28).
• The pea aphid (Acyrthosiphon pisum) was caught at seven sites this week,with a first arrival at Hereford (5/6), and a hotspot at Starcross (18), plus field reports of pea aphids in Kent and some PGRO field trials.
• The black bean aphid (Aphis fabae) has been caught at six sites this week, with field reports from beans and courgettes in Kent and Warwickshire.
• A single currant-lettuce aphid (Nasonovia ribisnigri) was caught at Kirton(1/6).

ahdb-aphid-news-120615.pdf bulletin_09_2015.pdf

Rosemary Collier : 12 Jun 2015 15:50 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Today we found:

• 0 male and 6 female cabbage root flies (3 water traps)
• 21 bean seed flies (3 traps)
• 48 carrot flies (3 traps) in our new carrots
• 2 cabbage root fly eggs (15 cauliflower plants)
• 10 turnip moths (2 traps)
• 10 diamond-back moths
• 2 flea beetles (3 traps)
• 1 pollen beetle (3 traps)
• 1 cabbage stem weevil (3 traps)

Rosemary Collier : 12 Jun 2015 14:20 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Today we found:

• 0 male and 12 female cabbage root flies (3 water traps)
• 23 bean seed flies (3 traps)
• 64 carrot flies (3 traps) in our new carrots
• 12 cabbage root fly eggs (15 cauliflower plants)
• 1 turnip moth (2 traps)
• 4 flea beetles (3 traps)
• 1 pollen beetle (3 traps)
• 1 cabbage stem weevil (3 traps)

Rosemary Collier : 08 Jun 2015 15:46 |  Comments (0) |  Close comments |  Report a problem

Aphid bulletins

The latest editions of the Rothamsted Suction Trap Bulletin and AHDB Aphid News are attached. The information of interest to vegetable and salad growers is as follows:

• Numbers of the peach–potato aphid (Myzus persicae) are increasing with highest numbers in eastern England.

• The potato aphid (Macrosiphum euphorbiae) was caught at three sites this week in low numbers.

• Numbers of the willow ̶ carrot aphid (Cavariella aegopodii) have increased at 9/13 sites this week, with highest numbers in southern and eastern England.

• The mealy cabbage aphid (Brevicoryne brassicae) was caught at seven sites this week, with first arrivals at Kirton (30/5), Broom’s Barn (26/5) and Rothamsted (30/5). Accumulated numbers are well below the 10-year means.

• The pea aphid (Acyrthosiphon pisum) was caught at four sites this week, with first arrivals at Broom’s Barn (30/5) and Rothamsted (27/5), plus a field report of pea aphids in a crop in eastern England.

• The black bean aphid (Aphis fabae) has been caught at seven sites this week, with highest numbers at Broom’s Barn. Field reports from East Anglia indicate big colonies on both spring (10-20%) and winter beans (<10%).

ahdb_aphid_news_20150605.pdf bulletin_08_2015.pdf

Rosemary Collier : 05 Jun 2015 17:06 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Today we found:

• 0 male and 27 female cabbage root flies (3 water traps)
• 69 bean seed flies (3 traps)
• 87 carrot flies (3 traps) in our new carrots
• 24 cabbage root fly eggs (15 cauliflower plants)
• 2 turnip moths (2 traps)
• 2 silver Y moths (2 traps)

Rosemary Collier : 05 Jun 2015 17:06 |  Comments (0) |  Close comments |  Report a problem

FV 416b – cabbage root fly egg counts in Cornwall

The egg counts up to Monday 1st June are as follows - they show the mean numbers of eggs per week found around a sample of 20 plants per location:

Rosemary Collier : 02 Jun 2015 11:22 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Today we found:

• 0 male and 11 female cabbage root flies (3 water traps)
• 40 bean seed flies (3 traps)
• 73 carrot flies (3 traps) in our new carrots
• 6 cabbage root fly eggs (15 cauliflower plants)
• 3 turnip moths (2 traps)
• 2 silver Y moths (2 traps)

Rosemary Collier : 01 Jun 2015 17:50 |  Comments (0) |  Close comments |  Report a problem