All entries for Wednesday 23 July 2014

Pest update from Wellesbourne

Between Friday (18th) and Tuesday (22nd) we captured:

• 13 carrot flies on traps in this year's crop of carrots (3 traps).
• Carrot fly numbers have not increased as 'expected' and it may be that the recent hot weather has caused at least some of the population to aestivate in the pupal stage. A similar thing happened at this time last year and although we captured low numbers of flies over an extended period, damage was high when we harvested our trials in the early autumn.

We collected a total of 82 cabbage root fly eggs from around our 15 newly-planted cauliflower plants.

The 3 yellow water traps caught:

2 male and 34 female cabbage root flies

• 15 bean seed flies
• 8 pollen beetles
• 76 flea beetles
• 4 cabbage stem weevils

There were no silver Y moths, 1 diamond-back moth and no turnip moths (2 pheromone traps per species).

Some potted brassica plants in an experiment belonging to one of our MSc students has been heavily damaged by adult cabbage stem weevils - see below.

Rosemary Collier : 23 Jul 2014 10:07 |  Comments (0) |  Close comments |  Report a problem