All entries for Friday 21 July 2017
July 21, 2017
AHDB Aphid News
The latest edition of AHDB Aphid News has just been released.
- Black bean aphids have been caught across the country in both ST and YWT this week, the highest number was caught in the ST at York (23).
- The peach–potato aphid (Myzus persicae) numbers decreased at most ST sites this week with the highest numbers found at Wellesbourne (26). Tests show that up to 62% of these migrants are carrying Turnip yellows virus.
- The mealy cabbage aphid was caught at seven ST sites this week, decreasing at twelve sites with the highest numbers caught at Wellesbourne (9) and Hereford (9). Lower numbers were also found in YWT compared to the previous two weeks.
- Currant-lettuce aphids (Nasonovia ribisnigri) were caught in ST at Wellesbourne (1), Hereford (1) and Starcross (1) this week.
- A single willow–carrot aphid was caught at Kirton and the parsnip aphids were also highest at Kirton.
Pest update from Wellesbourne
Between Friday and today we caught:
On 3 sticky traps:
- 47 carrot flies
In 3 water traps in a plot of swedes and 1 trap near oil seed rape.
- 15 male cabbage root flies and 28 females
- 39 bean seed flies
- 302 pollen beetles
- 18 flea beetles
- 57 cabbage stem weevils
- 19 cabbage stem flea beetles
We also recovered 55 cabbage root fly eggs from the soil around 15 cauliflower plants (new plants).
We caught 3 diamond-back moths in our pheromone traps.