All entries for Friday 25 July 2014

Rothamsted suction trap captures for the week ending 20th July

A combination of the hot weather and thundery downpours resulted in little significant aphid flight activity in the week ending 20^th July. In Scotland things are later and aphids remain somewhat more active right across the board. 2014webbulletin16.pdfahdb_aphid_news_20140725.pdf

• Numbers of the peach–potato aphid (Myzus persicae), potato aphid (Macrosiphum euphorbiae) and cabbage aphid (Brevicoryne brassicae) flying are now low everywhere.
• The pea aphid (Acyrthosiphon pisum) has been caught at ten sites with hotspots at Wellesbourne (87), Rothamsted (35) and Writtle (20).
• The black bean aphid, (Aphis fabae), was caught at ten sites and numbers are roughly the same as last week or have started to fall.

Rosemary Collier : 25 Jul 2014 16:03 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Between Tuesday (22nd) and Friday (25th) we found:

• 8 carrot flies on traps in this year's carrots (3 traps) (it really looks as if some of the population are aestivating due to the hot weather)
• Total of 87 cabbage root fly eggs from around 15 cauliflower plants.
• There was 1 silver Y moth, no diamond-back moths and no turnip moths (2 traps per species).

The 3 yellow water traps caught:

• 3 male and 30 female cabbage root flies
• 20 bean seed flies
• 6 pollen beetles
• 38 flea beetles
• 2 cabbage stem weevils
• 1 small white butterfly

Rosemary Collier : 25 Jul 2014 15:56 |  Comments (0) |  Close comments |  Report a problem