All entries for June 2015

Aphid and Turnip yellow virus News

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

• 18-22/06/2015, lots M. persicae were caught (12 yellow water traps), 88% of those tested were carrying TuYV.
• 22-25/06/2015, lots M. persicae were caught (12 yellow water traps), 85% of those tested were carrying TuYV.
• From the Rothamsted Insect Survey suction trap catch, 15-21/6/2015, 107 M. persicae were identified, 93% of those tested were carrying TuYV.

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

• 18-22/06/2015, lots M. persicae were caught (12 yellow water traps), 75% of those tested were carrying TuYV.
• 22-25/06/2015, lots M. persicae were caught (12 yellow water traps), 65% of those tested were carrying TuYV.
• From the Rothamsted Insect Survey suction trap catch, 15-21/6/2015, 152 M. persicae were identified, 86% of those tested 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).

Press release on the new round of HAPI projects involving the University of Warwick

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

Diana Katschnig : 30 Jun 2015 16:39 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Today we found:

• 18 male and 33 female cabbage root flies (3 water traps)
• 24 bean seed flies (3 traps)
• 13 carrot flies (3 traps) in our new carrots
• 45 cabbage root fly eggs (15 cauliflower plants)
• 2 turnip moths (2 traps)
• 13 brassica flea beetles (3 traps)
• 20 pollen beetles (3 traps)

Rosemary Collier : 29 Jun 2015 17:17 |  Comments (0) |  Close comments |  Report a problem

Updated 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 11: 15/6 – 21/6. Aphid numbers in the suction-traps this bulletin week have increased as the warm weather continues. However, the forecast heatwave next week may be too hot for some!

• Numbers of the peach–potato aphid (Myzus persicae) have increased substantially through much of England, with highest numbers in central and eastern England. Field reports from eastern England of peach–potato aphids beginning to appear in many potato crop canopies suggest crops should be closely monitored.
• The potato aphid (Macrosiphum euphorbiae) was caught at eleven sites this week in low numbers, with small hotspots at Kirton (28), Preston (11) and Wellesbourne (11).
• The willow ̶carrot aphid (Cavariella aegopodii) was caught in all our traps this week, and numbers have revived a little in response to the good weather. Numbers were highest at Kirton (416) and Broom’s Barn (403).
• The mealy cabbage aphid (Brevicoryne brassicae) was caught at ten sites this week, with a big hotspot at Wellesbourne (552), and smaller hotspots at Hereford (104) and Writtle (118). The pea aphid (Acyrthosiphon pisum) was caught at seven sites this week, with hotspots at Writtle (22) and Wye (11).
• The black bean aphid (Aphis fabae) has been caught at eight sites this week, with a hotspot at Writtle (80).
• No currant-lettuce aphids (Nasonovia ribisnigri) were captured.

ahdb-aphid-news-11-.pdf bulletin_11_2015.pdf

Rosemary Collier : 27 Jun 2015 09:23 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Yesterday we found:

• 6 male and 10 female cabbage root flies (3 water traps)
• 43 bean seed flies (3 traps)
• 36 carrot flies (3 traps) in our new carrots
• 7 cabbage root fly eggs (15 cauliflower plants)
• 4 turnip moths (2 traps)
• 26 brassica flea beetles (3 traps)
• 6 pollen beetles (3 traps)
• 3 cabbage stem weevil
  

Rosemary Collier : 27 Jun 2015 09:03 |  Comments (0) |  Close comments |  Report a problem

FV 416b – cabbage root fly egg counts in Cornwall

The egg counts up to Monday 22nd June are as follows - they show the mean numbers of eggs per week found around a sample of 20 plants per location:

Rosemary Collier : 25 Jun 2015 17:58 |  Comments (0) |  Close comments |  Report a problem

Aphid and Turnip yellow virus News

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

• 11-15/06/2015, high numbers of M. persicae were caught (12 yellow water traps), 91% of those tested were carrying TuYV.
• 15-18/06/2015, high numbers of M. persicae were caught (12 yellow water traps), 80% of those tested were carrying TuYV.
• From the Rothamsted Insect Survey suction trap catch, 08-14/06/2015, 51 M. persicae were identified, 67% of those tested were carrying TuYV.

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

• 11-15/06/2015, 1 M. persicae was caught (12 yellow water traps), but this individual did not carry TuYV.
• 15-18/06/2015, high numbers of M. persicae were caught (12 yellow water traps), 68% of those tested were carrying TuYV.
• From the Rothamsted Insect Survey suction trap catch, 08-14/06/2015, 0 M. persicae were identified.

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).

Press release on the new round of HAPI projects involving the University of Warwick

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

Diana Katschnig : 23 Jun 2015 14:11 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Today we found:

• 3 male and 14 female cabbage root flies (3 water traps)
• 30 bean seed flies (3 traps)
• 18 carrot flies (3 traps) in our new carrots
• 6 cabbage root fly eggs (15 cauliflower plants)
• 10 turnip moths (2 traps)
• 1 diamond-back moth (2 traps)
• 9 flea beetles (3 traps)
• 3 pollen beetles (3 traps)

Rosemary Collier : 22 Jun 2015 13:15 |  Comments (0) |  Close comments |  Report a problem

More on Aphid and TuYV News!

The data on Aphid and TuYV news below are being collected as part of a new BBSRC HAPI project led by Dr John Walsh. Peach potato aphids from the Rothamsted Insect Survey suction traps at Wellesbourne, Warwickshire and Kirton, Lincolnshire and yellow water traps adjacent to cabbage crops in Warwickshire and Lincolnshire are being tested for the presence of Turnip yellows virus (TuYV; formerly known as Beet western yellows virus). The virus has been shown to significantly reduce yields of vegetable brassicas, cause tipburn in cabbage and also infect oilseed rape. This is part of a new BBSRC HAPI research project led by Dr John Walsh at the University of Warwick. The project involves a collaboration with colleagues at Rothamsted Research and Allium and Brassica Agronomy and will investigate the development of integrated approaches, including genomic aspects, for pest and disease control in horticultural field crops Press release on the new round of HAPI projects involving the University of Warwick. Most of the funding comes from BBSRC http://www.bbsrc.ac.uk/news/food-security/2015/150601-n-4m-fund-important-food-crops/ with additional funding from industry partners including AHDB Horticulture, Syngenta UK Ltd., Dow Agro Sciences Ltd., A L Tozer Ltd., Sakata UK Ltd., Enza Zaden UK Ltd. B.V. and Rijk Zwaan UK Ltd.

Over the next 3 years, weekly information on the numbers of peach potato trapped and the numbers carrying TuYV will be posted on the AHDB Horticulture Pest Blog.

Diana Katschnig : 19 Jun 2015 16:29 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Updated 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 10: 08/6 – 14/6. The weather this bulletin week was seasonably warm and aphid numbers in the suction-traps have increased, despite a wet weekend.

• Numbers of the peach–potato aphid (Myzus persicae) have increased at 8/14 sites, with highest numbers in central and southern England.

• The potato aphid (Macrosiphum euphorbiae) was caught at nine sites this week in low numbers, with small hotspots at Hereford (17) and Writtle (11).

• The willow ̶ carrot aphid (Cavariella aegopodii) was caught in all our traps this week, but numbers are decreasing in 8/14 sites. Numbers were highest at Rothamsted (321) and Silwood (288).

• The mealy cabbage aphid (Brevicoryne brassicae) was caught at six sites this week, with hotspots at Wellesbourne (162) and Hereford (38).

• The pea aphid (Acyrthosiphon pisum) was caught at seven sites this week, with hotspots at Silwood (10) and Wye (20).

• The black bean aphid (Aphis fabae) has been caught at eight sites this week in low numbers.

• No currant-lettuce aphids (Nasonovia ribisnigri) were caught this week.

ahdb-aphid-news-10-.pdf bulletin_10_2015.pdf

Rosemary Collier : 19 Jun 2015 15:21 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Today we found:

• 1 male and 27 female cabbage root flies (3 water traps)
• 31 bean seed flies (3 traps)
• 20 carrot flies (3 traps) in our new carrots
• 19 cabbage root fly eggs (15 cauliflower plants)
• 12 turnip moths (2 traps)
• 44 flea beetles (3 traps) - NOTE THE INCREASE IN NUMBERS SINCE LAST TIME!
• 1 pollen beetle

Rosemary Collier : 19 Jun 2015 14:34 |  Comments (0) |  Close comments |  Report a problem