All entries for Saturday 27 June 2015

Updated aphid bulletins

The latest editions of the Rothamsted Suction Trap Bulletin and AHDB Aphid News are attached. The information of interest to vegetable and salad growers is as follows:

The information below relates to suction-trap samples collected during bulletin week 11: 15/6 – 21/6. Aphid numbers in the suction-traps this bulletin week have increased as the warm weather continues. However, the forecast heatwave next week may be too hot for some!

• Numbers of the peach–potato aphid (Myzus persicae) have increased substantially through much of England, with highest numbers in central and eastern England. Field reports from eastern England of peach–potato aphids beginning to appear in many potato crop canopies suggest crops should be closely monitored.
• The potato aphid (Macrosiphum euphorbiae) was caught at eleven sites this week in low numbers, with small hotspots at Kirton (28), Preston (11) and Wellesbourne (11).
• The willow ̶carrot aphid (Cavariella aegopodii) was caught in all our traps this week, and numbers have revived a little in response to the good weather. Numbers were highest at Kirton (416) and Broom’s Barn (403).
• The mealy cabbage aphid (Brevicoryne brassicae) was caught at ten sites this week, with a big hotspot at Wellesbourne (552), and smaller hotspots at Hereford (104) and Writtle (118). The pea aphid (Acyrthosiphon pisum) was caught at seven sites this week, with hotspots at Writtle (22) and Wye (11).
• The black bean aphid (Aphis fabae) has been caught at eight sites this week, with a hotspot at Writtle (80).
• No currant-lettuce aphids (Nasonovia ribisnigri) were captured.

ahdb-aphid-news-11-.pdf bulletin_11_2015.pdf

Rosemary Collier : 27 Jun 2015 09:23 |  Comments (0) |  Close comments |  Report a problem

Pest update from Wellesbourne

Yesterday we found:

• 6 male and 10 female cabbage root flies (3 water traps)
• 43 bean seed flies (3 traps)
• 36 carrot flies (3 traps) in our new carrots
• 7 cabbage root fly eggs (15 cauliflower plants)
• 4 turnip moths (2 traps)
• 26 brassica flea beetles (3 traps)
• 6 pollen beetles (3 traps)
• 3 cabbage stem weevil
  

Rosemary Collier : 27 Jun 2015 09:03 |  Comments (0) |  Close comments |  Report a problem