All entries for Saturday 24 May 2014

Large narcissus fly forecast update

The updated forecast for large narcissus fly is here: narcissus_fly_template_23_may_2014.pdf

Rosemary Collier : 24 May 2014 14:57 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Between Tuesday (20th) and Friday (23rd) we found:

• 226 carrot flies on traps in this year's carrots (3 traps)
• 1 winged willow-carrot aphid on 3 x 0.5 m lengths of carrot row (21 May)

In the 3 water traps in the 'new' cauliflower plot:

• 2 male and 15 female cabbage root flies
• 42 bean seed flies
• 32 pollen beetles
• 72 flea beetles - these have increased in number since the last sample was taken
• 4 cabbage stem weevils - also an increase in numbers

We collected a total of 76 cabbage root fly eggs from around 15 cauliflower plants (planted 15 April).

There were no diamond-back or silver Y moths, but we caught one turnip moth (cutworm) the first of the year!

Rosemary Collier : 24 May 2014 11:45 |  Comments (0) |  Close comments |  Report a problem

Rothamsted suction trap samples for the week ending 18 May

Information on captures during the week ending 18 May has been released.

Aphid flight activity rose significantly as the weather warmed up, with both total numbers and diversity increasing this week. Aphid natural enemies are also increasing, particularly ladybirds.

• Numbers of peach–potato aphid (Myzus persicae) have increased dramatically this week, particularly in eastern and south eastern England, but none yet at Newcastle or north of the border.
• The potato aphid (Macrosiphum euphorbiae) was caught across the country in low numbers.
• The pea aphid (Acyrthosiphon pisum) was caught at eleven sites this week, with numbers highest in eastern England.
• The cabbage aphid (Brevicoryne brassicae) was caught at five sites this week in low numbers
• The willow carrot aphid (Cavariella aegopodii) migration increased substantially this week, with highest numbers at Kirton and Broom’s Barn.
• The currant-lettuce aphid (Nasonovia ribisnigri) was caught at 3 sites.
• The black bean aphid (Aphis fabae) was caught at 2 sites.
  

Rosemary Collier : 24 May 2014 09:07 |  Comments (0) |  Close comments |  Report a problem