All entries for July 2017

Brassica aphids and virus News

The proportion of peach potato aphid (M. persicae) carrying Turnip yellows virus (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 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.

Angela Hambidge : 14 Jul 2017 08:40 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

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.

Rosemary Collier : 11 Jul 2017 18:25 |  Comments (0) |  Close comments |  Report a problem

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.
  

Rosemary Collier : 08 Jul 2017 06:56 |  Comments (0) |  Close comments |  Report a problem

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.

Rosemary Collier : 07 Jul 2017 16:30 |  Comments (0) |  Close comments |  Report a problem

Brassica aphids and virus News

The proportion of peach potato aphid (M. persicae) carrying Turnip yellows virus (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 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.

Angela Hambidge : 06 Jul 2017 12:06 |  Tags: Aphid Tuyv |  Comments (1) |  Close comments |  Report a problem

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.

Rosemary Collier : 04 Jul 2017 21:14 |  Comments (0) |  Close comments |  Report a problem

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

Rosemary Collier : 01 Jul 2017 11:56 |  Comments (0) |  Close comments |  Report a problem