Update from Rothamsted Insect Survey

The latest information on aphid captures by the Rothamsted Insect Survey has just been released. bulletin_14_2013.pdf

More detailed information on the pest aphids of vegetable crops is here. aphid_news20130802.pdf

In summary:

• Peach–potato aphid suction trap numbers are increasing in England, but remain scarce in Scottish samples. However, the number of potato aphids in Scotland increased markedly this bulletin week. 
• A total of 146 suction trap peach–potato aphids have been tested for insecticide resistance so far this year, and 140 have tested positive for MACE (these are resistant to pirimicarb) and 137 also tested positive for super Kdr (these are resistant to pyrethroids). 
• Yellow water trays placed by Broom’s Barn at twenty eight sites in sugar beet areas caught 19 peach–potato aphids and no potato aphids during the period 24/7–30/7, roughly the same as the previous week. 
• Pea and cabbage aphid numbers are increasing in central and southern England.
• The migration of willow–carrot aphid is now all but complete, with just some late stragglers north of the border.
• Currant–lettuce aphids were caught at four sites, and accumulated numbers are above the ten year means at four sites in central and southern England.

Rosemary Collier : 02 Aug 2013 17:21 |  Comments (0) |  Report a problem