All entries for June 2016

Update on pest numbers at Wellesbourne

Since Tuesday we have captured:

In pheromone traps (2 per species):

• Turnip moth = 14
• Silver Y moth = 2
• Cabbage moth = 0
• Diamond-back moth = 28

On 3 sticky traps:

• Carrot fly = 5

In 3 water traps:

• Cabbage root fly males = 0
• Cabbage root fly females = 6
• Bean seed flies = 24
• Flea beetles = 3
• Pollen beetles = 12
• Cabbage stem weevils = 0
• Cabbage seed weevils = 0

Cabbage root fly eggs = 8 (15 plants)

Rosemary Collier : 17 Jun 2016 16:42 |  Comments (0) |  Close comments |  Report a problem

Update on diamond–back moth

It seems that many of the very large number of diamond-back moths that have arrived in the UK since the beginning of June may be reaching the end of their life. However, female moths will have laid eggs before dying and it is likely that some of these eggs will now have hatched into caterpillars and be causing damage to brassica crops.

Because of the current interest in this pest some additional information has been summarised here.

Rosemary Collier : 16 Jun 2016 16:27 |  Tags: Diamond-Back Moth |  Comments (0) |  Close comments |  Report a problem

Pest update for Tuesday 14th June

Since Friday 10th June we have captured:

In pheromone traps (2 per species):

• Turnip moth = 10
• Silver Y moth = 0
• Cabbage moth = 0
• Diamond-back moth = 189

On 3 sticky traps:

• Carrot fly = 31

In 3 water traps:

• Cabbage root fly males = 0
• Cabbage root fly females = 10
• Bean seed flies = 39
• Flea beetles = 20
• Pollen beetles = 16
• Cabbage stem weevils = 1
• Cabbage seed weevils = 1

Cabbage root fly eggs = 2 (15 plants)

Rosemary Collier : 15 Jun 2016 08:47 |  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 with funding from the BBSRC Horticulture And Potato Initiative (HAPI).

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

Angela Hambidge : 14 Jun 2016 14:39 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Since Tuesday we have captured:

In pheromone traps (2 per species):

• Turnip moth = 7
• Silver Y moth = 0
• Cabbage moth = 0
• Diamond-back moth = 204

On 3 sticky traps:

• Carrot fly = 30

In 3 water traps:

• Cabbage root fly males = 6
• Cabbage root fly females = 15
• Bean seed flies = 19
• Flea beetles = 146
• Pollen beetles = 144
• Cabbage stem weevils = 20
• Cabbage seed weevils = 9

Cabbage root fly eggs = 9 (15 plants)

Rosemary Collier : 10 Jun 2016 20:36 |  Comments (0) |  Close comments |  Report a problem

Update on aphid captures by Rothamsted suction traps

The latest edition of AHDB Aphid News has just been released and the most recent information about aphid captures is here - for captures in the week ending 5th June.

• The first peach-potato aphid was caught at Dundee and there was a big hotspot at Wellesbourne (167).
• The willow-carrot aphid was caught at 13 sites with hotspots at Preston (105), Dundee (88) and Wellesbourne (78).
• The pea aphid was caught at nine sites with numbers decreasing at 7 sites.
• The cabbage aphid was caught a nine sites with hotspots at Wellesbourne (112) and Hereford (125).
• Low numbers of the black bean aphid were caught at 4 sites spanning from Dundee to Starcross which remains the hotspot for this species.
• Single currant-lettuce aphids were caught at Dundee and York.
• Parsnip aphids were caught at Preston (Cavariella pastinaceae 25) and single aphids at Kirton and Starcross (both Cavariella theobaldi).

Rosemary Collier : 10 Jun 2016 15:09 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne for Tuesday 7th June

Since Friday we have captured:

In pheromone traps (2 per species):

• Turnip moth = 9
• Silver Y moth = 1
• Cabbage moth = 0
• Diamond-back moth = 245

On 3 sticky traps:

• Carrot fly = 48

In 3 water traps:

• Cabbage root fly males = 4
• Cabbage root fly females = 14
• Bean seed flies = 13
• Flea beetles = 8
• Pollen beetles = 71
• Cabbage stem weevils = 3
• Cabbage seed weevils = 1

Cabbage root fly eggs = 42 (15 plants)

Rosemary Collier : 08 Jun 2016 06:42 |  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 with funding from the BBSRC Horticulture And Potato Initiative (HAPI).

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

Angela Hambidge : 07 Jun 2016 13:06 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem

Still many diamond–back moths around

Twitter and particularly https://twitter.com/MigrantMothUKcontinues to report huge numbers of diamond-back moths all over the country. The picture below shows some of the moths captured in a light trap in south Warwickshire last night - next to a field of oil seed rape.

Rosemary Collier : 07 Jun 2016 10:33 |  Comments (0) |  Close comments |  Report a problem

A few more parsnip aphids captured

Mark Taylor from the Rothamsted Insect Survey has reported that in the suction-traps for the week 23-29/5 they caught 4 Cavariella pastinaceae at Preston and one Cavariella theobaldi at Rothamsted (none elsewhere).

Rosemary Collier : 04 Jun 2016 06:31 |  Comments (0) |  Close comments |  Report a problem