All entries for September 2016
September 30, 2016
Rothamsted Insect Survey Aphid Bulletin
A new edition of the Rothamsted Insect Survey Aphid Bulletin has been published (week ending 25th September).
Pest update from Wellesbourne
On Friday, 23rd September we captured:
In pheromone traps (2 per species):
- Turnip moth = 1
- Silver Y moth = 0
- Cabbage moth = 0
- Diamond-back moth = 0
On 3 sticky traps:
- Carrot fly = 75 (in second sowing)
In 3 water traps:
- Cabbage root fly males = 26
- Cabbage root fly females = 31
- Bean seed flies = 32
- Flea beetles = 3
- Pollen beetles = 0
- Small white butterfly = 0
- Large white butterfly = 0
- Cabbage stem weevil = 0
Cabbage root fly eggs = 48 (15 plants)
September 28, 2016
Brassica aphids and virus News
The proportion of peach potato aphid (M. persicae) carrying Turnip yellows virus (TuYV)
Date |
Type of trap |
Numbers of M. persicae caught |
% of those tested carrying TuYV |
Wellesbourne, Warwickshire |
|||
12/9-18/9/2016 |
Suction trap |
3 |
0% |
15/9-19/9/2016 |
Yellow water traps |
4 |
50% |
19/9-22/9/2016 |
Yellow water traps |
4 |
50% |
Kirton, Lincolnshire |
|||
12/9-18/9/2016 |
Suction trap |
3 |
33% |
Leverton, Lincolnshire |
|||
15/9-19/9/2016 |
Yellow water traps |
54 |
58% |
19/9-22/9/2016 |
Yellow water traps |
36 |
67% |
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; Carl Sharp, Allium & Brassica Agronomy Ltd.
September 27, 2016
Pest update from Wellesbourne for 23 and 27 September
On Tuesday, 27th September we captured:
In pheromone traps (2 per species):
- Turnip moth = 0
- Silver Y moth = 0
- Cabbage moth = 0
- Diamond-back moth = 0
On 3 sticky traps:
- Carrot fly = 56 (in second sowing)
In 3 water traps:
- Cabbage root fly males = 35
- Cabbage root fly females = 25
- Bean seed flies = 33
- Flea beetles = 1
- Pollen beetles = 0
- Small white butterfly = 0
- Large white butterfly = 0
- Cabbage stem weevil = 0
Cabbage root fly eggs = 44 (15 plants)
On Friday, 23rd September we captured:
In pheromone traps (2 per species):
- Turnip moth = 0
- Silver Y moth = 0
- Cabbage moth = 0
- Diamond-back moth = 0
On 3 sticky traps:
- Carrot fly = 22 (in second sowing)
In 3 water traps:
- Cabbage root fly males = 5
- Cabbage root fly females = 8
- Bean seed flies = 18
- Flea beetles = 3
- Pollen beetles = 0
- Small white butterfly = 0
- Large white butterfly = 0
- Cabbage stem weevil = 0
Cabbage root fly eggs = 6 (15 plants)
September 23, 2016
Rothamsted Insect Survey Aphid Bulletin
A new edition of the Rothamsted Insect Survey Aphid Bulletin has been published (week ending 18th September). The numbers of Myzus persicae appear to have increased a bit since the last Bulletin.
September 21, 2016
Pest update for Wellesbourne on Tuesday 20th September
Since Friday we have captured:
In pheromone traps (2 per species):
- Turnip moth = 1
- Silver Y moth = 0
- Cabbage moth = 0
- Diamond-back moth = 0
On 3 sticky traps:
- Carrot fly = 22 (in second sowing)
In 3 water traps:
- Cabbage root fly males = 5
- Cabbage root fly females = 18
- Bean seed flies = 10
- Flea beetles = 1
- Pollen beetles = 0
- Small white butterfly = 1
- Large white butterfly = 0
- Cabbage stem weevil = 0
Cabbage root fly eggs = 9 (15 plants)
On our untreated brassicas there are a few cabbage aphid colonies and a developing infestation of cabbage whitefly. we also have small numbers of caterpillars of cabbage moth, garden pebble moth and small white butterfly.
September 20, 2016
Brassica aphids and virus News
The proportion of peach potato aphid (M. persicae) carrying Turnip yellows virus (TuYV)
Date |
Type of trap |
Numbers of M. persicae caught |
% of those tested carrying TuYV |
Wellesbourne, Warwickshire |
|||
05/9-11/9/2016 |
Suction trap |
4 |
25% |
08/9-12/9/2016 |
Yellow water traps |
0 |
- |
12/9-15/9/2016 |
Yellow water traps |
7 |
57% |
Kirton, Lincolnshire |
|||
05/9-11/9/2016 |
Suction trap |
1 |
0% |
Leverton, Lincolnshire |
|||
08/9-12/9/2016 |
Yellow water traps |
6 |
0% |
12/9-15/9/2016 |
Yellow water traps |
24 |
46% |
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; Carl Sharp, Allium & Brassica Agronomy Ltd.
September 16, 2016
Update on pest numbers at Wellesbourne
Since Tuesday we have captured:
In pheromone traps (2 per species):
- Turnip moth = 0
- Silver Y moth = 0
- Cabbage moth = 0
- Diamond-back moth = 1
On 3 sticky traps:
- Carrot fly = 8 (in second sowing)
In 3 water traps:
- Cabbage root fly males = 8
- Cabbage root fly females = 12
- Bean seed flies = 15
- Flea beetles = 7
- Pollen beetles = 0
- Small white butterfly = 1
- Large white butterfly = 0
- Cabbage stem weevil = 0
Cabbage root fly eggs = 9 (15 plants)
On our untreated brassicas there are a few cabbage aphid colonies and a developing infestation of cabbage whitefly. we also have small numbers of caterpillars of cabbage moth, garden pebble moth and small white butterfly.
Update on Rothamsted suction trap captures
A new edition of the Rothamsted Insect Survey Aphid Bulletin has been published (week ending 11th September). The latest edition of AHDB News can be found here.
- The peach–potato aphid was caught at six suction-trap sites, with highest numbers at Dundee.
- The cabbage aphid was caught at just two sites, Kirton and Hereford.
- Numbers of both species are normal for the time of year.
September 15, 2016
Pest update for Wellesbourne – 13th September
Since Friday we have captured:
In pheromone traps (2 per species):
- Turnip moth = 0
- Silver Y moth = 0
- Cabbage moth = 0
- Diamond-back moth = 0
On 3 sticky traps:
- Carrot fly = 11 (in second sowing)
In 3 water traps:
- Cabbage root fly males = 9
- Cabbage root fly females = 33
- Bean seed flies = 21
- Flea beetles = 10
- Pollen beetles = 0
- Small white butterfly = 3
- Large white butterfly = 0
- Cabbage stem weevil = 0
Cabbage root fly eggs = 23 (15 plants)
On our untreated brassicas there are a few cabbage aphid colonies and a developing infestation of cabbage whitefly. we also have small numbers of caterpillars of cabbage moth, garden pebble moth and small white butterfly.