All entries for July 2017
July 14, 2017
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 |
|||
26/6-02/7/2017 |
Suction trap |
83 |
93% |
03/7-06/7/2017 |
Yellow water traps |
1352 |
94% |
06/7-10/7/2017 |
Yellow water traps |
1624 |
50% |
Kirton, Lincolnshire |
|||
26/6-02/7/2017 |
Suction trap |
15 |
64% |
Spalding, Lincolnshire |
|||
29/6-03/7/2017 |
Yellow water traps |
257 |
82% |
03/7-06/7/2017 |
Yellow water traps |
112 |
81% |
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.
July 11, 2017
Pest update from Wellesbourne
Between Friday and today we caught:
On 3 sticky traps:
- 18 carrot flies
In 3 water traps in a plot of swedes and 1 trap near oil seed rape.
- 16 male cabbage root flies and 95 females
- 75 bean seed flies
- 479 pollen beetles
- 24 flea beetles
- 19 cabbage stem weevils
- 1 cabbage seed weevil
- 12 cabbage stem flea beetles
We also recovered 114 cabbage root fly eggs from the soil around 15 cauliflower plants (new plants).
We caught 3 diamond-back moths and 1 turnip moth (2 traps) in our pheromone traps.
July 08, 2017
AHDB Aphid News
The latest edition of AHDB Aphid News is now available.
- The peach–potato aphid (Myzus persicae) numbers decreased at all ST (suction trap) sites with the highest numbers at Wellesbourne (97) and Newcastle (64). Tests show that up to 68% of these migrants are carrying Turnip yellows virus.
- The mealy cabbage aphid was caught at twelve ST sites this week, increasing at six sites with the highest number at Wellesbourne (12), and higher than average numbers in YWT (yellow water traps) from the North of Scotland, Midlands and South West. Field reports indicate they are mostly in low numbers in OSR crops.
- No currant-lettuce aphids (Nasonovia ribisnigri) were caught in ST this week.
- Numbers of the willow–carrot aphid are highest at York and the parsnip aphids are highest at Kirton.
July 07, 2017
Pest update from Wellesbourne
Between Tuesday and today we caught:
On 3 sticky traps:
- 13 carrot flies
In 3 water traps in a plot of swedes and 1 trap near oil seed rape.
- 24 male cabbage root flies and 81 females
- 48 bean seed flies
- 757 pollen beetles
- 33 flea beetles
- 32 cabbage stem weevils
- 10 cabbage stem flea beetles
- 1 silver Y moth!
We also recovered 182 cabbage root fly eggs from the soil around 15 cauliflower plants (new plants).
We caught 14 diamond-back moths (2 traps) in our pheromone traps.
Finally - one large narcissus fly in one of the field cages.
July 06, 2017
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 |
|||
19/6-25/6/2017 |
Suction trap |
93 |
79% |
26/6-29/6/2017 |
Yellow water traps |
1444 |
56% |
29/6-03/7/2017 |
Yellow water traps |
944 |
60% |
Kirton, Lincolnshire |
|||
19/6-25/6/2017 |
Suction trap |
62 |
71% |
Spalding, Lincolnshire |
|||
26/6-29/6/2017 |
Yellow water traps |
119 |
75% |
29/6-03/7/2017 |
Yellow water traps |
- |
- |
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.
July 04, 2017
Pest update from Wellesbourne
Between Friday and today we caught:
On 3 sticky traps in each of our carrot plots:
- 7 carrot flies - spring-sown carrots
In 3 water traps in a plot of swedes and 1 trap near oil seed rape.
- 19 male cabbage root flies and 52 females
- 38 bean seed flies
- 2189 pollen beetles
- 27 flea beetles
- 33 cabbage stem weevils
- 22 cabbage stem flea beetles
- 1 small white butterfly
We also recovered 299 cabbage root fly eggs from the soil around 15 cauliflower plants (new plants).
We caught 2 turnip moths and 7 silver Y moths (2 traps per species) in our pheromone traps.
July 01, 2017
Pest update from Wellesbourne
Between Tuesday and Friday we caught:
On 3 sticky traps - 3 carrot flies in spring-sown carrots - traps removed from overwintered carrots
We recovered 38 cabbage root fly eggs from the soil around 15 cauliflower plants.
We caught 3 turnip moths and 8 silver Y moths (2 traps per species) in our pheromone traps.
In 3 water traps in a plot of swedes and 1 trap near oil seed rape:
- 22 male cabbage root flies and 43 females
- 44 bean seed flies
- 788 pollen beetles
- 1 flea beetles
- 3 cabbage stem weevils
- 17 cabbage stem flea beetle
- 1 small white butterfly