All entries for July 2015

Pest update from Wellesbourne

Today we found:

• 2 male and 26 female cabbage root flies (3 water traps)
• 13 bean seed flies (3 traps)
• 89 carrot flies (3 traps)
• 23 cabbage root fly eggs (15 cauliflower plants)
• 62 brassica flea beetles (3 traps)
• 32 pollen beetles (3 traps)
• 3 cabbage stem weevils (3 traps)
• 7 large white butterflies (3 traps)
• 10 small white butterflies (3 traps)

Rosemary Collier : 31 Jul 2015 17:21 |  Comments (0) |  Close comments |  Report a problem

Updated aphid bulletins for 20–26 July

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) have fallen again this week, and are now low everywhere.
• The numbers of the willow ̶ carrot aphid (Cavariella aegopodii) are now low everywhere.
• The mealy cabbage aphid (Brevicoryne brassicae) was caught at nine sites this week, with highest numbers at Wellesbourne (48) and Hereford (47).
• Numbers of the pea aphid (Acyrthosiphon pisum) decreased at most sites this week.
• Numbers of the black bean aphid (Aphis fabae) are now decreasing across much of England.
• Numbers of aphid predators (hoverflies, ladybirds and lacewings) are increasing in our trap samples and field reports reinforce heightened natural enemy activity.
• Single currant-lettuce aphids (Nasonovia ribisnigri) were caught in the suction-traps at Hereford, Rothamsted and Starcross this week.

bulletin_16_2015.pdf ahdb-aphid-news-20150731.pdf

Rosemary Collier : 31 Jul 2015 17:16 |  Comments (0) |  Close comments |  Report a problem

Aphid and Turnip yellows virus News

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

• 16-20/07/2015, ~65 individuals of M. persicae were caught (12 yellow water traps), 84% of those tested were carrying TuYV.
• 20-23/07/2015, ~20 individuals of M. persicae were caught (12 yellow water traps), 38% of those tested were carrying TuYV.
• 14-17/07/2015, From the Rothamsted Insect Survey suction trap catch, 3 M. persicae were identified, 2 of these were carrying TuYV.

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

• 16-20/07/2015, 5 individuals of M. persicae were caught (12 yellow water traps), 80% of these were carrying TuYV.
• 20-23/07/2015, 5 individuals of M. persicae were caught (12 yellow water traps), 20% of these were carrying TuYV.
• 13-19/07/2015, From the Rothamsted Insect Survey suction trap catch, 7 M. persicae were identified, 2 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).

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 : 28 Jul 2015 16:16 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Today we found:

• 6 male and 25 female cabbage root flies (3 water traps)
• 22 bean seed flies (3 traps)
• 17 carrot flies (3 traps) in our new carrots
• 32 cabbage root fly eggs (15 cauliflower plants)
• 40 brassica flea beetles (3 traps)
• 5 pollen beetles (3 traps)
• 5 large white butterflies (3 traps)
• 11 small white butterflies (3 traps)

Rosemary Collier : 27 Jul 2015 19:40 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Today we found:

• 9 male and 91 female cabbage root flies (3 water traps)
• 30 bean seed flies (3 traps)
• 34 carrot flies (3 traps) in our new carrots
• 88 cabbage root fly eggs (15 cauliflower plants)
• 71 brassica flea beetles (3 traps)
• 31 pollen beetles (3 traps)
• 2 cabbage stem weevils (3 traps)
• 5 large white butterflies (3 traps)
• 5 small white butterflies (3 traps)

Rosemary Collier : 24 Jul 2015 17:01 |  Comments (0) |  Close comments |  Report a problem

Updated aphid bulletins – captures 13–19 July

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) have fallen again this week, and are now low everywhere.

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

• The numbers of the willow ̶ carrot aphid (Cavariella aegopodii) are now low everywhere.

• The mealy cabbage aphid (Brevicoryne brassicae) was caught at ten sites this week, with high numbers at Wellesbourne (855) and Hereford (413).

• Numbers of the pea aphid (Acyrthosiphon pisum) increased at nine sites this week, with accumulated numbers highest at Starcross.

• Numbers of the black bean aphid (Aphis fabae) remain high, but are now decreasing across much of England.

• Numbers of aphid predators (hoverflies, ladybirds and lacewings) are increasing in our trap samples and field reports suggest are now much more common in the field.

ahdb-aphid-news-15-.pdf bulletin_15_2015.pdf

Rosemary Collier : 24 Jul 2015 15:32 |  Comments (0) |  Close comments |  Report a problem

Aphid and Turnip yellows virus News

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

• 9-13/07/2015, Intermediate numbers of M. persicae were caught (12 yellow water traps), 60% of those tested were carrying TuYV.
• 13-16/07/2015, High numbers of M. persicae were caught (12 yellow water traps), 69% of those tested were carrying TuYV.
• 6-11/07/2015, From the Rothamsted Insect Survey suction trap catch, 18 M. persicae were identified, 64% of those tested were carrying TuYV.

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

• 9-13/07/2015, High numbers of M. persicae were caught (12 yellow water traps), 85% of those tested were carrying TuYV.
• 13-16/07/2015, 11 M. persicae were caught (12 yellow water traps), 73% of these were carrying TuYV.
• 6-11/07/2015, From the Rothamsted Insect Survey suction trap catch, 48 M. persicae were identified, 79% 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 : 21 Jul 2015 16:32 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Yesterday we found:

• 4 male and 51 female cabbage root flies (3 water traps)
• 15 bean seed flies (3 traps)
• 19 carrot flies (3 traps) in our new carrots
• 76 cabbage root fly eggs (15 cauliflower plants)
• 1 turnip moth (2 traps)
• 1 diamond-back moth (2 traps)
• 105 brassica flea beetles (3 traps)
• 31 pollen beetles (3 traps)
• 2 cabbage stem weevils (3 traps)
• 2 large white butterflies (3 traps)
• 14 small white butterflies (3 traps)

Rosemary Collier : 21 Jul 2015 09:46 |  Comments (0) |  Close comments |  Report a problem

Wellesbourne pest update

Today we found:

• 4 male and 29 female cabbage root flies (3 water traps)
• 16 bean seed flies (3 traps)
• 13 carrot flies (3 traps) in our new carrots
• 58 cabbage root fly eggs (15 cauliflower plants)
• 0 turnip moths (2 traps)
• 1 diamond-back moth (3 traps)
• 157 brassica flea beetles (3 traps)
• 24 pollen beetles (3 traps)
• 9 cabbage stem weevils (3 traps)

Rosemary Collier : 17 Jul 2015 17:04 |  Comments (0) |  Close comments |  Report a problem

Updated aphid bulletins – captures 6–12 July

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) have fallen significantly this week, highest numbers were at Kirton (111).

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

• The numbers of the willow ̶ carrot aphid (Cavariella aegopodii) are now low everywhere.

• The mealy cabbage aphid (Brevicoryne brassicae) was caught at eleven sites this week, with numbers highest in central and eastern England.

• The pea aphid (Acyrthosiphon pisum) was caught at eleven sites this week, with numbers decreasing and below the 10yr averages. Field reports of pea aphid are common especially in eastern England.

• Numbers of the black bean aphid (Aphis fabae) remain high, but are slowly decreasing everywhere except Kirton. Field reports indicate that despite multiple spray applications, aphids are very quickly re-colonising crops.

• The currant-lettuce aphid (Nasonovia ribisnigri) was caught in the suction-traps at Dundee, Preston and Hereford.

• Numbers of aphid predators (hoverflies, ladybirds and lacewings) are increasing in our trap samples and field reports suggest are now much more common in the field.

ahdb-aphid-news-14-.pdf bulletin_14_2015.pdf

Rosemary Collier : 17 Jul 2015 16:57 |  Comments (0) |  Close comments |  Report a problem