Rothamsted suction trap captures for week ending 7 July

Writing about web page http://www.rothamsted.ac.uk/insect-survey/Bulletins/2013WebBulletin11.pdf

The latest Bulletin has now been released.

This document provides more detailed information on the pest aphids of vegetable crops aphid_news20130712.pdf.

In summary:

Willow–carrot aphid numbers have increased again in seven suction traps and are above the ten year means for this time of year. Accumulated numbers for 2013 at Hereford and Starcross are also above the ten year means.

Peach–potato aphid suction trap numbers are now slowly increasing, with a hotspot at Broom’s Barn. Numbers of both peach–potato aphid and potato aphid are low for the time of year.

Yellow water trays placed by Broom’s Barn at twenty eight sites in sugar beet areas caught 25 peach–potato aphids and no potato aphids during the period 3/7–9/7.

Currant–lettuce aphids and cabbage aphids were both caught at three sites this week in low numbers.

Pea aphids and black bean aphids were caught throughout the Country in low numbers.

There are field reports of peach–potato aphids, potato aphids, pea aphids and black bean aphids present in small colonies in sugar beet, potatoes, cabbage, peas and beans, but numbers are low despite the warm weather. Alongside these aphid reports are reports of increasing populations of natural enemies, particularly hoverflies and aphid parasitoids.

Rosemary Collier : 13 Jul 2013 07:06 |  Comments (0) |  Report a problem