Aphid bulletins

The latest editions of the Rothamsted Suction Trap Bulletin and AHDB Aphid News are attached. During Bulletin Week 3 (20th-26th April) a drop in temperatures has slowed crop growth and restricted some aphid flights. The information of interest to vegetable and salad growers is as follows:

• A first flush of potato aphids (Macrosiphum euphorbiae) has been caught this week, with five first arrivals, including a particularly early individual at Broom’s Barn, almost a month earlier than the 10yr average and forecast.

• The willow ̶ carrot aphid (Cavariella aegopodii) has been caught at four sites this week, with first arrivals at Edinburgh, Kirton and Rothamsted.

• No mealy cabbage aphids (Brevicoryne brassicae) have been caught in suction-traps so far this year. However there have been field reports of overwintering colonies of mealy cabbage aphids building in some winter oilseed rape crops in southern England.

ahdb_aphid_news_20150501.pdf bulletin_03_2015.pdf

Rosemary Collier : 01 May 2015 18:51 |  Comments (0) |  Report a problem