All entries for Saturday 27 July 2013

Update from Rothamsted insect survey

Information on suction trap captures up to 21st July is now available. More detailed information about the pest aphids of vegetables is here.

Peach–potato aphid suction trap numbers are increasing in England, with a hotspot at Rothamsted. Generally accumulated numbers of both peach–potato aphid and potato aphid are low for the time of year.

There are field reports of large numbers of peach–potato aphid in cabbages, with many new arrivals, probably arriving from rape crops.

Yellow water trays placed by Broom’s Barn at twenty eight sites in sugar beet areas caught 16 peach–potato aphids and one potato aphid during the period 17/7–23/7, roughly the same as the previous week

Black bean aphids, pea aphids and cabbage aphid numbers are all building in central and southern England. The late migration of willow–carrot aphid continues, but numbers are now decreasing.

Currant–lettuce aphids were caught at two sites, and accumulated numbers are above the ten year means at four sites in central and southern England.

Rosemary Collier : 27 Jul 2013 11:52 |  Comments (0) |  Close comments |  Report a problem