Summary information for 10-05-2019 through to 16-05-2019

Sample data for 10-05-2019 through to 16-05-2019

Region Samples Mean PVY Index per Sample Mean Colonising Aphids per Sample Mean Aphids per Sample Total aphid species
North Scotland 4 0.26 0.25 3.00 4
Northern England 5 3.73 2.80 41.00 17
Midlands 2 27.66 21.50 72.50 18
East Anglia 7 1.19 1.14 4.86 10
South-West 1 0.00 0.00 1.00 1
TOTAL 19 4.39 3.47 20.89 24

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 4 0.26 0.25 3.00 4
Northern England 8 4.12 3.25 38.38 18
Midlands 4 17.29 15.25 45.00 21
East Anglia 12 6.17 4.00 31.67 13
South-West 2 0.00 0.00 0.50 1
TOTAL 30 5.90 4.53 29.33 30

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

Summary information as of 16-05-2019

  • Midlands (2 samples) - High Risk
  • Northern England (4 samples), East Anglia (3 samples) - Moderate Risk
  • North Scotland (4 samples), South West (1 sample) - Low Risk

  • North of Scotland: Virus pressure was Low, although 1 Peach-Potato aphid was found.
  • Grampian: No samples.
  • Angus and Perthshire: No samples.
  • Borders: No samples.
  • Northern England: Virus pressure was Moderate. Peach-Potato aphids found at four sites; one Potato aphid was found. Other potato virus vectors found: Currant-Sowthistle aphid, Leaf-Curling Plum aphid, Willow-Carrot aphid (2x the average), Black-Bean aphid, Cabbage aphid, Shallot aphid, Pea aphid.
  • Midlands: Virus pressure was High. 37 Peach-Potato aphids (2x the average) found across two sites; six Potato aphids were found across both sites. Other potato virus vectors found: Currant-Sowthistle aphid, Leaf-Curling Plum aphid, Willow-Carrot aphid, Black-Bean aphid (2x the average), Cabbage aphid (3x the average), Pea aphid.
  • East Anglia: Virus pressure was Moderate. 6 Peach-Potato aphids were found at one site. No Potato aphids were found. Other potato virus vectors found: Shallot aphid, Black-Bean aphid.
  • South-West: Virus pressure was Low. No Peach-Potato aphids, Potato aphids or other virus vectors were found.

  • 22 samples have been received this week, from North Scotland, Northern England, Midlands, East Anglia and East Anglia.
  • Peach-Potato aphid has been found in samples from North Scotland, Northern England, Midlands and East Anglia so far this year. This is approximately three weeks earlier than last year.
  • Potato aphids have been found from Northern England, Midlands and East Anglia this week.
  • Black-Bean aphids were present in Northern England, Midlands and East Anglia this week.
  • If you have not yet started trapping please note that traps should go out 2 weeks before emergence.
  • If you have started trapping, please ensure that you have sent us the correct grid reference.

  • The Black-Bean aphid (Aphis fabae) has been found to transmit PVA so if you are growing PVA susceptible varieties (Desiree, King Edward, Maris Peer, Marfona etc) you may wish to take this into account. This species was found in high numbers from East Anglia this week.
  • Aphids are becoming more visible with the increase in temperatures, and Peach-Potato aphids and Potato aphids are already flying. Traps in the South-West and southern half of the country will need to be deployed promptly, if they haven't been already - sites in the North of Scotland are already out, and catching Peach-Potato aphid!

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