All entries for Friday 02 August 2019
August 02, 2019
The latest edition of Aphid News has been released for the week eding 28th July.
- Peach–potato aphid numbers decreased to a third of the previous week, only increasing at Kirton.
- No potato aphids were captured.
- Cabbage aphid numbers also declined to a third of last week, only increasing at Hereford and Silwood Park.
- Two currant–lettuce aphids were captured at Inverness.
- Numbers of willow–carrot aphids decreased to 43% of last week, only increasing at Preston.
- Pea aphid numbers decreased to around 80% of last week, increasing at five sites.
- Overall numbers of black bean aphids decreased to around 40% of last week, only increasing at four
sites, but including a first arrival at Newcastle.
When the water traps in the swede plot were checked today there were:
- 13 male and 29 female cabbage root flies
- 71 bean seed flies
- 25 flea beetles
- 267 pollen beetles
- 10 cabbage stem weevils
- 165 cabbage stem flea beetles
- 0 cabbage seed weevils
There were 232 carrot flies on the 3 sticky traps in the new plot for 2019.
14 cabbage root fly eggs were laid between 30 July and 2nd August (around 15 plants).
Four diamond-back moths, 3 turnip moths, no silver Y moths and no cabbage moths were captured in pheromone traps. There are 2 traps for each species.
We also caught 2 diamond-back moths on 5 carrot fly traps.