Summary information for 14-07-2021 through to 22-07-2021

Sample data for 14-07-2021 through to 22-07-2021

Region Samples Mean PVY Index per Sample Mean Colonising Aphids per Sample Mean Aphids per Sample Total aphid species
North Scotland 12 0.44 0.08 12.17 16
Grampian 14 0.50 0.36 3.79 15
Angus & Perthshire 10 0.56 0.90 8.50 21
Borders 8 0.34 0.75 3.88 12
Northern England 14 2.02 1.29 27.79 22
Midlands 8 6.69 4.88 60.50 29
East Anglia 15 0.67 0.33 3.53 17
South-West 6 0.97 0.00 10.67 13
TOTAL 87 1.36 0.95 15.00 48

Sample data for 2021

Region Samples Mean PVY Index per Sample Mean Colonising Aphids per Sample Mean Aphids per Sample Total aphid species
North Scotland 75 0.87 0.07 5.85 33
Grampian 110 2.52 0.17 7.05 46
Angus & Perthshire 48 1.62 0.42 7.06 42
Borders 47 0.78 0.36 4.11 33
Northern England 131 8.04 0.82 24.31 58
Midlands 91 20.30 3.86 62.65 70
East Anglia 132 4.84 2.88 11.80 57
South-West 99 7.90 3.36 24.73 57
TOTAL 733 6.52 1.68 19.97 96

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

Summary information as of 22-07-2021

  • Midlands (8 samples), Northern England (12 samples) - Moderate Risk
  • North Scotland (12 samples), Grampian (12 samples),  Angus and Perthshire (9 samples), Borders (7 samples), East Anglia (11 samples),  South West (6 samples) - Low Risk

  • North of Scotland: Virus pressure remained Low. No Peach-Potato aphids found. Potato aphids found at 1 site. Other potato virus vectors present: Bird Cherry-Oat aphid, Rose-Grain aphid, Leaf-Curling Plum aphid, Willow-Carrot aphid, Pea aphid, Black-Bean aphid (a good vector of PVA).
  • Grampian: Virus pressure remained Low. No Peach-Potato aphids found. Potato aphids found at 4 sites. Other potato virus vectors present: Willow-Carrot aphid, Rose-Grain aphid, Leaf-Curling Plum aphid, Grain aphid, Pea aphid.
  • Angus and Perthshire: Virus pressure remained Low. Peach-Potato aphids were found at 1 site. Potato aphids were found at 4 sites. Another potato colonising aphid, Glasshouse and Potato aphid, was found at 1 site. Other potato virus vectors present: Rose-Grain aphid, Leaf-Curling Plum aphid, Currant-Sowthistle aphid, Pea aphid.
  • Borders: Virus pressure remained Low. No Peach-Potato aphids found. Potato aphids were found at 1 sites. Another potato colonising aphid, Glasshouse and Potato aphid, was found at 1 site. Other potato virus vectors present: Rose-Grain aphid, Black-Bean aphid (a good vector of PVA), Grain aphid, Leaf-Curling Plum aphid.
  • Northern England: Virus pressure rose to Moderate. Peach-Potato aphids were found at 3 sites. Potato aphids were recorded at 4 sites.  Other potato virus vectors present: Black-Bean aphid (a good vector of PVA), Leaf-Curling Plum aphid, Willow-Carrot aphid, Rose-Grain aphid, Pea aphid, Grain aphid, Currant-Sowthistle aphid, Cabbage aphid.
  • Midlands: Virus pressure remained Moderate. Peach-Potato aphids were found at 1 site. No Potato aphids were recorded. Other potato virus vectors present: Willow-Carrot aphid, Leaf-Curling Plum aphid, Rose-Grain aphid, Pea aphid and Black-Bean aphid (a good vector of PVA), Cabbage aphid, Bird Cherry-Oat aphid.
  • East Anglia: Virus pressure remained Low. Peach-Potato aphid was found at 1 site, Potato aphids were found at 1 site. Other potato virus vectors present: Black-Bean aphid (a good vector of PVA), Grain aphid, Pea aphid.
  • South-West: Virus pressure remained Low. No Peach-Potato aphids or Potato aphids were found. Other potato virus vectors present: Willow-Carrot aphid, Cabbage aphid, Pea aphid, Black-Bean aphid (a good vector of PVA).

  • Monitoring in seed potatoes is well established in all regions.
  • 725 samples have been received so far this year. 
  • Site 81 is highlighted as having the highest PVY index this week, but please note this is because two samples were received within the same week. Site 77 was actually the highest with an Index of 10.8.
  • Peach-Potato aphids were found in Angus & Perthshire and in all English regions except the South West.
  • Potato aphids were found in all regions except the Midlands and the South West.
  • Another potato colonising aphid, Glasshouse and Potato aphid, was found in both Angus and Perthshire and the Borders.
  • Overall aphid numbers are continuing to reduce throughout the country, with almost every species either at or below average numbers, the exceptions being Potato aphid in the Borders and Willow-Carrot aphid in the South West, both of which are higher.
  • Cereal aphids are dropping, with Rose-Grain aphid found from the Midlands northwards. Bird Cherry-Oat aphid was found in North Scotland and the Midlands. Grain aphid was recorded from Grampian, the Borders,Northern England and East Anglia.
  • Black-Bean aphid is in North Scotland and then from the Borders southwards - this is a good vector of PVA.
  • Willow-Carrot aphid has been found in North Scotland, Grampian, Northern England, the Midlands and the South West.
  • Pea aphid was present everywhere except the Borders.
  • Leaf-curling Plum aphid was recorded from the Midlands northwards.
  • Currant-Sowthistle aphid was found in Angus and Perthshire and Northern England.
  • Cabbage aphids were found in Northern England, the Midlands and the South West this week.
  • If you are one of the very few who have not yet started trapping please note that traps should have gone out 2 weeks before crop emergence so that you know what the risk is when the crop is at its most vulnerable. But please get your traps out now, there is still time!!
  • Please ensure that you send us the name and grid reference for the field that you have placed your trap in, or intend to place your trap in. Thank you to everyone who has responded, but we are still waiting for the last few sites. You can use what3words if that is easier and you are welcome to email or phone us with grid references.
  • Remember to be consistent when labelling the pots. Please let us know if you have actually placed the trap in a different location to what you had planned, so we can update our records before your sample arrives to avoid delays.

  • You can check the current data for GB on the map on the website (https://aphmon.fera.co.uk/). Use the slider at the top right to move back through the year and the slider on the bottom right to compare with the previous year. Data shows from the most recent date for which we have received samples.
  • A reminder to please use either pencil or waterproof pen when you write on your pot labels, so we can still read them even if the pot leaks.
  • Please be consistent in your labelling and let us know if you are going to change something - a note in the envelope with the pot or an email would be great. We are still spending a lot of time trying to establish the identity of pots, which then delays the processing and publication of results.

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