All entries for Friday 27 May 2016

Aphid captures by Rothamsted suction traps

The latest edition of AHDB Aphid News has just been published and the Rothamsted suction trap records are here. This is for the week ending 22 May.

• The peach–potato aphid was caught at nine sites, with hotspots at Writtle (58) and Broom’s Barn (36).
• The pea aphid was caught at nine sites, including a first arrival at York (18/5) and hotspots at Writtle (41), Broom’s Barn (24) andWellesbourne (19).
• The willow ̶carrot aphid was caught at all sites, with hotspots at Kirton (137), Broom's Barn (97) and Writtle (81).
• The cabbage aphid was caught at five sites this week, withhotspots at Kirton (35) and Wellesbourne (24).
• Single black bean aphids were caught at four sites.
• A single currant-lettuce aphid (Nasonovia ribisnigri) was caught in theHereford suction-trap.
• Sycamore aphids are beginning to dominate our current suction-trap samples.

Rosemary Collier : 27 May 2016 17:13 |  Comments (0) |  Close comments |  Report a problem

Today's pest counts at Wellesbourne

Today there were 66 carrot flies on traps in newly-emerged carrots (3 traps).

In the water traps (3) there were:

• 0 male and 2 female cabbage root flies
• 56 bean seed flies
• 8 pollen beetles
• 7 flea beetles
• 1 cabbage stem weevil
• 3 turnip moths (2 traps)
• no silver Y moths, no diamond-back moths and no cabbage moths (2 traps each species)

There were 33 cabbage root fly eggs (15 cauliflower plants).

Rosemary Collier : 27 May 2016 17:07 |  Comments (0) |  Close comments |  Report a problem

Parsnip aphids update

In addtion to willow-carrot aphid (Cavariella aegopodii) and Myzus persicae it is possible that two species of parsnip aphid also transmit viruses to carrot - see Adrian Fox's report for FV 382b.

Of these, so far this year just one Cavariella theobaldi has been caught in the suction traps run by the Rothamsted Insect Survey - at Broom’s Barn on 14^thMay - and no Cavariella pastinaceae have been captured so far.

Rosemary Collier : 27 May 2016 11:33 |  Comments (0) |  Close comments |  Report a problem