AHDB Aphid News

The latest edition of AHDB Aphid News has been released.

• The peach–potato aphid (Myzus persicae) is a big mover this week, with high numbers in the STs (suction traps) at Broom’s Barn and Wellesbourne, as well as very high numbers in the YWTs in south west England. Tests show these migrants are carrying high levels of Turnip yellows virus.
• The mealy cabbage aphid was caught in both STs and YWTs (yellow water traps) and has been reported from some OSR crops causing direct feeding damage. The threshold for control is >13% plants infested before petal fall in winter OSR and >4% plants infested before petal fall in spring OSR.
• No currant-lettuce aphids (Nasonovia ribisnigri) were caught in the STs this week.
• The willow–carrot aphid migration continues to build throughout England, with highest ST numbers at Kirton (448), Wellesbourne (621) and Hereford (406) and very high numbers in YWTs in northern England.
• Numbers of parsnip aphids also increased, particularly C. pastinaceae at Hereford.

Rosemary Collier : 02 Jun 2017 23:25 |  Comments (0) |  Report a problem