Summary information for 07-07-2021 through to 15-07-2021

Sample data for 07-07-2021 through to 15-07-2021

Region Samples Mean PVY Index per Sample Mean Colonising Aphids per Sample Mean Aphids per Sample Total aphid species
North Scotland 14 0.88 0.00 3.07 10
Grampian 17 0.60 0.00 2.94 18
Angus & Perthshire 11 0.35 0.36 2.45 16
Borders 8 0.23 0.63 2.13 8
Northern England 19 1.29 0.47 15.42 25
Midlands 7 6.09 5.43 45.43 27
East Anglia 18 0.87 0.33 4.28 23
South-West 10 0.97 0.10 14.00 18
TOTAL 104 1.16 0.61 9.28 55

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 64 0.94 0.06 4.58 29
Grampian 96 2.81 0.15 7.53 43
Angus & Perthshire 38 1.90 0.29 6.68 36
Borders 41 0.84 0.32 4.05 30
Northern England 121 8.54 0.75 24.31 57
Midlands 85 21.51 4.08 62.94 69
East Anglia 121 5.21 3.12 12.61 56
South-West 93 8.35 3.58 25.63 56
TOTAL 659 7.14 1.81 20.69 95

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

Summary information as of 15-07-2021

  • Midlands (7 samples) -Moderate Risk
  • North Scotland (14 samples), Grampian (17 samples),  Angus and Perthshire (10 samples), Borders (6 samples), Northern England (16 samples)East Anglia (15 samples),  South West (10 samples) - Low Risk

  • North of Scotland: Virus pressure remained Low. No Peach-Potato aphids or Potato aphids found. Other potato virus vectors present: Bird Cherry-Oat aphid, Rose-Grain aphid, Leaf-Curling Plum aphid, Willow-Carrot aphid, Currant-Sowthistle aphid.
  • Grampian: Virus pressure remained Low. No Peach-Potato aphids or Potato aphids were found. Other potato virus vectors present: Willow-Carrot aphid, Rose-Grain aphid, Leaf-Curling Plum aphid, Black-Bean aphid (a good vector of PVA).
  • Angus and Perthshire: Virus pressure remained Low. No Peach-Potato aphids were found. Potato aphids were found at 2 sites. Other potato virus vectors present: Grain aphid, Leaf-Curling Plum aphid.
  • Borders: Virus pressure remained Low. No Peach-Potato aphids found. Potato aphids were found at 2 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).
  • Northern England: Virus pressure remained Low. Peach-Potato aphids were found at 2 sites. Potato aphids were recorded at 3 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.
  • Midlands: Virus pressure remained Moderate. Peach-Potato aphids were found at 3 sites. Potato aphids were recorded at 5 sites. Other potato virus vectors present: Willow-Carrot aphid, Leaf-Curling Plum aphid, Rose-Grain aphid, Grain aphid, Pea aphid and Black-Bean aphid (a good vector of PVA), Cabbage aphid.
  • East Anglia: Virus pressure remained Low. Peach-Potato aphid was found at 2 sites, Potato aphids were found at 2 sites. Other potato virus vectors present: Willow-Carrot aphid, Black-Bean aphid (a good vector of PVA), Bird-Cherry Oat aphid, Leaf-Curling Plum aphid, Grain aphid, Pea aphid.
  • South-West: Virus pressure remained Low. Peach-Potato aphids were found at 1 site. No Potato aphids were found. Other potato virus vectors present: Willow-Carrot aphid, Grain aphid, Cabbage aphid, Bird-Cherry Oat aphid, Black-Bean aphid (a good vector of PVA).

  • Monitoring in seed potatoes is well established in all regions.
  • 652 samples have been received so far this year. 
  • Peach-Potato aphids were found in all English regions.
  • Potato aphids were found in all regions except North Scotland, Grampian and the South West.
  • Another potato colonising aphid, Glasshouse and Potato aphid, was found in 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 Willow-Carrot aphid in North Scotland and Leaf-Curling Plum aphid in both Grampian and the Midlands, all of which are higher.
  • Cereal aphids are dropping, with Rose-Grain aphid found in North Scotland, Grampian, the Borders, Northern England and the Midlands. Bird Cherry-Oat aphid was found in North Scotland, East Anglia and the South West. Grain aphid was recorded from Angus and Perthshire and all English regions.
  • Black-Bean aphid is in Grampian, the Borders and all English regions - this is a good vector of PVA.
  • Willow-Carrot aphid has been found ithroughout the country.
  • Pea aphid was present in Northern England, the Midlands and East Anglia.
  • Leaf-curling Plum aphid was recorded from North Scotland, Grampian, Angus and Perthshire, Northern England, the Midlands and East Anglia.
  • Currant-Sowthistle aphid was found in North Scotland and Northern England.
  • Cabbage aphids were found in 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.