All entries for November 2015

Carrot fly captures at Wellesbourne

We stopped monitoring most pests a couple of weeks ago but have continued to monitor carrot fly. Recent captures are as follows (on 3 traps):

13 October 10

16 October 10

19 October 13

26 October 17

2 November 29

These captures suggest that there is a small third generation. These flies are not a threat to carrot crops as even if they lay eggs, any resulting larvae are unlikely to develop sufficiently to cause damage.

Rosemary Collier : 07 Nov 2015 17:28 |  Comments (0) |  Close comments |  Report a problem

Aphid captures by Rothamsted traps

Trap captures of pest aphids relevant to vegetable and salad crops to date are in the attached file. On the whole aphid activity is continually decreasing as most insects will be in, or entering, their overwintering stages. However, brassica growers should still monitor crops for aphids and also cabbage whitefly. Whilst relatively large numbers of willow-carrot aphid are being captured in suction traps, these are not an immediate threat to crops as they are returning to willow to overwinter.

rothamsted_suction_trap_aphid_records_2015.pdf

Rosemary Collier : 07 Nov 2015 17:18 |  Comments (0) |  Close comments |  Report a problem

Aphid and Turnip yellows virus News

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

• 19-26/10/2015. No M. persicae were caught (12 yellow water traps).
• 19-25/10/2015. From the Rothamsted Insect Survey suction trap catch, no M. persicae were caught.

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

• 19-26/10/2015. 29 Individuals of M. persicae were caught (12 yellow water traps), 13 of these individuals (0.45%) were carrying TuYV.
• 19-25/10/2015. From the Rothamsted Insect Survey suction trap catch, 5 individuals of M. persicae were caught (12 yellow water traps), 4 of these individuals 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 : 04 Nov 2015 08:49 |  Tags: Aphid Tuyv |  Comments (0) |  Close comments |  Report a problem