Updated aphid bulletins for 20–26 July

The latest editions of the Rothamsted Suction Trap Bulletin and AHDB Aphid News are attached. The information of interest to vegetable and salad growers is as follows:

• Numbers of the peach–potato aphid (Myzus persicae) have fallen again this week, and are now low everywhere.
• The numbers of the willow ̶ carrot aphid (Cavariella aegopodii) are now low everywhere.
• The mealy cabbage aphid (Brevicoryne brassicae) was caught at nine sites this week, with highest numbers at Wellesbourne (48) and Hereford (47).
• Numbers of the pea aphid (Acyrthosiphon pisum) decreased at most sites this week.
• Numbers of the black bean aphid (Aphis fabae) are now decreasing across much of England.
• Numbers of aphid predators (hoverflies, ladybirds and lacewings) are increasing in our trap samples and field reports reinforce heightened natural enemy activity.
• Single currant-lettuce aphids (Nasonovia ribisnigri) were caught in the suction-traps at Hereford, Rothamsted and Starcross this week.

bulletin_16_2015.pdf ahdb-aphid-news-20150731.pdf

Rosemary Collier : 31 Jul 2015 17:16 |  Comments (0) |  Report a problem