Summary information for 14-06-2019 through to 20-06-2019

Sample data for 14-06-2019 through to 20-06-2019

Region Samples Mean PVY Index per Sample Mean Colonising Aphids per Sample Mean Aphids per Sample Total aphid species
North Scotland 13 3.35 3.31 8.85 18
Grampian 16 0.50 0.31 2.44 14
Angus & Perthshire 7 1.97 1.43 5.29 12
Borders 5 0.07 0.20 3.20 7
Northern England 17 22.35 21.06 28.82 24
Midlands 7 13.33 12.86 26.57 26
East Anglia 18 11.46 10.94 18.50 34
South-West 8 4.18 2.38 19.00 20
TOTAL 91 8.56 7.95 15.03 54

Sample data for 2019

Region Samples Mean PVY Index per Sample Mean Colonising Aphids per Sample Mean Aphids per Sample Total aphid species
North Scotland 44 2.73 2.07 10.91 40
Grampian 53 1.65 1.34 7.21 32
Angus & Perthshire 23 4.14 1.39 9.96 23
Borders 17 4.15 3.53 10.41 23
Northern England 79 57.86 25.77 113.70 60
Midlands 37 27.53 22.86 56.30 55
East Anglia 90 16.55 14.26 33.06 57
South-West 35 7.30 5.09 24.97 43
TOTAL 378 20.39 12.16 42.81 83

View a regional breakdown of the sites with the greatest PVY index

Summary information as of 20-06-2019

  • Northern England (14 samples) - High Risk
  • North Scotland (9 samples), Midlands (6 samples),  East Anglia (16 samples) - Moderate Risk
  • Grampian (14 samples), Angus and Perthshire (2 samples), Borders (4 samples), South West (5 samples) - Low Risk

  • 70 samples have been received this week, from every region.
  • 361 samples have been received so far this year.
  • Peach-Potato aphids were found from every region except Angus and Perthshire and the Borders.
  • Potato aphids were found from every region except Angus and Perthshire, Borders and the South West.
  • Grain aphids have been found from Grampian and East Anglia this week.
  • Rose-Grain aphids have been found from Northern England to East Anglia
  • Black-Bean aphids were present in samples from North Scotland, Angus and Perthshire, Midlands, East Anglia and South West this week. This is a good vector of PVA.
  • Pea aphids have again been found in Northern England, East Anglia and the South-West.
  • Glasshouse and Potato aphid, another potato colonising species, has been found again this week in Grampian and Borders.
  • Willow-Carrot aphid numbers have dropped in all regions.

  • North of Scotland: Virus pressure Moderate. Peach-Potato aphids at 5 sites, and Potato aphids at 3 sites. Other potato virus vectors found: Leaf-Curling Plum (nearly double the average, but falling), Willow-Carrot, Black-Bean aphid.
  • Grampian: Virus pressure Low. Peach-Potato aphid at 2 sites; Potato aphids at 1 site. Other potato virus vectors found: Leaf-Curling Plum, Willow-Carrot, Grain, Currant-Sowthistle, Glasshouse and Potato aphid.
  • Angus and Perthshire: Virus pressure was Low. No Peach-Potato aphid or Potato aphids. Other potato virus vectors found: Black-Bean, Willow-Carrot aphid.
  • Borders: Virus pressure was Low. No Peach-Potato aphid or Potato aphids. Other potato virus vectors found:  Glasshouse and Potato, Currant-Sowthistle aphid.
  • Northern England: Virus pressure remained High. Peach-Potato aphids at 12 sites; Potato aphids at 2 sites. Other potato virus vectors found: Currant-Sowthistle, Leaf-Curling Plum, Willow-Carrot, Pea, Rose-Grain aphid.
  • Midlands: Virus pressure dropped to Moderate. Peach-Potato aphids at 5 sites; Potato aphids at 2 sites.  Other potato virus vectors found: Currant-Sowthistle, Leaf-Curling Plum, Willow-Carrot, Black-Bean, Cabbage, Shallot and Rose-Grain aphid.
  • East Anglia Virus pressure dropped to Moderate. Peach-Potato aphids at 13 sites. Potato aphids at 5 sites. Other potato virus vectors found: Black-Bean, Cabbage, Leaf-Curling Plum, Pea, Rose-Grain, Willow-Carrot,  Shallot, Currant-Sowthistle and Grain aphid.
  • South-West: Virus pressure dropped to Low. Peach-Potato aphids at 2 sites; no Potato aphids. Other virus vectors found: Black-Bean (higher than average), Leaf-Curling Plum, Willow-Carrot and Pea aphid.

  • A few crops have only just been planted, but most are in so please remember that traps should go out 2 weeks before emergence.
  • If you have started trapping, please ensure that you have sent us the full correct grid reference, and field name.
  • Without the correct grid reference other levy-payers don’t get the full benefit of the scheme. Any pots that can’t easily be identified will be left until last, which delays the results being sent out to you.

Along with the results from your aphid trap you need to take into account the following factors when considering the risk of virus spread.