Updated aphid bulletins – captures 13–19 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 potato aphid (Macrosiphum euphorbiae) was caught in low numbers at eight sites.

• The numbers of the willow ̶ carrot aphid (Cavariella aegopodii) are now low everywhere.

• The mealy cabbage aphid (Brevicoryne brassicae) was caught at ten sites this week, with high numbers at Wellesbourne (855) and Hereford (413).

• Numbers of the pea aphid (Acyrthosiphon pisum) increased at nine sites this week, with accumulated numbers highest at Starcross.

• Numbers of the black bean aphid (Aphis fabae) remain high, but are now decreasing across much of England.

• Numbers of aphid predators (hoverflies, ladybirds and lacewings) are increasing in our trap samples and field reports suggest are now much more common in the field.

ahdb-aphid-news-15-.pdf bulletin_15_2015.pdf

Rosemary Collier : 24 Jul 2015 15:32 |  Comments (0) |  Report a problem