All entries for Friday 27 June 2014

Rothamsted suction trap captures – week ending 22 June

The information below relates to suction-trap samples collected during the week ending 22 June. Despite reasonable conditions, total numbers of aphids in the suction-traps decreased somewhat, but the diversity of aphid species within this total increased. 2014webbulletin12.pdfahdb_aphid_news_20140627.pdf

• Numbers of peach–potato aphid (Myzus persicae) remain high in central and eastern England. The first individual has been caught in the suction-trap at Dundee, and this only the fourth in the Scottish traps so far this year.
• The potato aphid (Macrosiphum euphorbiae) was caught across the Country in low numbers. Numbers of the pea aphid (Acyrthosiphon pisum) have increased slightly at three sites this week. Field reports indicate threshold levels are being reached in some parts of southern England.
• The cabbage aphid (Brevicoryne brassicae) was caught at five sites this week in low numbers.
• The numbers of willow carrot aphid (Cavariella aegopodii) have declined further since last week.
• No currant-lettuce aphids (Nasonovia ribisnigri) were captured.
• Black bean aphids (Aphis fabae) were captured at 7 sites – with the highest numbers (14) captured at Writtle and Rothamsted (7).

Rosemary Collier : 27 Jun 2014 21:00 |  Comments (0) |  Close comments |  Report a problem

Pest update Wellesbourne

Between Tuesday (24th) and Friday (27th) we found:

• 6 carrot flies on traps in this year's carrots (3 traps)

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

• 15 male and 42 female cabbage root flies
• 41 bean seed flies
• 20 pollen beetles
• 144 flea beetles
• 1 cabbage stem weevil

We collected a total of 14 cabbage root fly eggs from around 15 newly-planted cauliflower plants (planted 15 April).

There were no diamond-back moths, 3 silver Y moths and 13 turnip moths (2 traps).

On 25th June there were 1 winged and 1 parasitised willow-carrot aphids on 3 x 0.5 m lengths of carrot row.

Rosemary Collier : 27 Jun 2014 19:46 |  Comments (0) |  Close comments |  Report a problem