Rothamsted suction trap samples for the week ending 25th May

Aphid flight activity continued in between the showers. Temperatures were about average for the time of year, so aphid numbers on the ground have the potential to increase.

• Numbers of peach–potato aphid (Myzus persicae) have increased in the west midlands and south west England, and remain high in the east, but none yet north of the border.

• The potato aphid (Macrosiphum euphorbiae) was caught across the Country in low numbers.

• The pea aphid (Acyrthosiphon pisum) was caught at six sites in low number.

• The cabbage aphid (Brevicoryne brassicae) was caught at five sites in low numbers

• The willow carrot aphid (Cavariella aegopodii) migration continued, with highest numbers at Preston and Kirton.

• One black bean aphid (Aphis fabae) was caught at Hereford.

• The currant lettuce aphid (Nasonovia ribisnigri) was caught in low numbers at 3 sites.

Rosemary Collier : 30 May 2014 16:09 |  Comments (0) |  Report a problem