All entries for Friday 16 September 2016
September 16, 2016
Update on pest numbers at Wellesbourne
Since Tuesday we have captured:
In pheromone traps (2 per species):
- Turnip moth = 0
- Silver Y moth = 0
- Cabbage moth = 0
- Diamond-back moth = 1
On 3 sticky traps:
- Carrot fly = 8 (in second sowing)
In 3 water traps:
- Cabbage root fly males = 8
- Cabbage root fly females = 12
- Bean seed flies = 15
- Flea beetles = 7
- Pollen beetles = 0
- Small white butterfly = 1
- Large white butterfly = 0
- Cabbage stem weevil = 0
Cabbage root fly eggs = 9 (15 plants)
On our untreated brassicas there are a few cabbage aphid colonies and a developing infestation of cabbage whitefly. we also have small numbers of caterpillars of cabbage moth, garden pebble moth and small white butterfly.
Update on Rothamsted suction trap captures
A new edition of the Rothamsted Insect Survey Aphid Bulletin has been published (week ending 11th September). The latest edition of AHDB News can be found here.
- The peach–potato aphid was caught at six suction-trap sites, with highest numbers at Dundee.
- The cabbage aphid was caught at just two sites, Kirton and Hereford.
- Numbers of both species are normal for the time of year.