All entries for Friday 12 July 2019

July 12, 2019

AHDB Aphid News

The latest edition of AHDB Aphid Newshas been released for the week ending 7th July.

  • Peach–potato aphid numbers have decreased to around 38% of the previous week's.
  • Potato aphid numbers have also decreased to a third of previous week's.
  • There was a hotspot of cabbage aphids at Writtle.
  • Two currant–lettuce aphids were captured at York.
  • Willow–carrot aphids decreased to just under half of those in the previous week.
  • Pea aphid numbers halved compared with the previous week across much of Britain but rose at Dundee.
  • Total numbers of black bean aphid have decreased to 44% of those in the previous week, with a substantial reduction inumbers at Wellesbourne and Starcross.

Pest update from Wellesbourne

When the water traps in the swede plot were checked today there were:

  • 139 male and 50 female cabbage root flies
  • 50 bean seed flies
  • 9 flea beetles
  • 713 pollen beetles
  • 51 cabbage stem weevils
  • 2 cabbage stem flea beetles
  • 1 cabbage seed weevil

There were 59 carrot flies on the 3 sticky traps in the new plot for 2019.

594 cabbage root fly eggs were laid between 9 and 12 July (around 15 plants).

1 diamond-back moth and 1 turnip moth were captured. No moths were captured in our other pheromone traps (silver Y moth, cabbage moth). There are 2 traps for each species.

We also caught 11 diamond-back moths on 5 carrot fly traps.


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