Summary information for 12-05-2017 through to 18-05-2017

Sample data for 12-05-2017 through to 18-05-2017

Region Samples Mean PVY Index per Sample Mean Colonising Aphids per Sample Mean Aphids per Sample Total aphid species
North Scotland 1 1.52 4.00 11.00 8
Angus & Perthshire 1 0.20 1.00 1.00 1
Midlands 2 28.41 19.00 49.50 13
East Anglia 9 4.37 2.00 15.89 25
South-West 4 22.43 19.50 41.75 28
TOTAL 17 11.03 8.18 24.76 41

Sample data for 2017

Region Samples Mean PVY Index per Sample Mean Colonising Aphids per Sample Mean Aphids per Sample Total aphid species
North Scotland 1 1.52 4.00 11.00 8
Angus & Perthshire 3 0.20 0.33 0.67 2
Midlands 2 28.42 19.00 49.50 13
East Anglia 15 2.83 1.40 10.20 26
South-West 5 19.37 17.00 37.60 28
TOTAL 26 7.63 5.73 17.42 41

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

Summary information as of 18-05-2017

  • East Anglia (7 samples) - Low Risk
  • South West (1 sample) - Moderate Risk
  • Midlands (2 samples) - High Risk

    • 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 a grid reference.
    • 23 samples have been received so far this year.
    • Peach-potato aphids and potato aphids have been found in samples from the Midlands, East Anglia and the South West during the last week. We have also found peach-potato aphids in samples from other crops in the Northern England.
    • Black-bean aphids were found in samples from the Midlands and East Anglia. Twice as many black-bean aphids were found compared with the average for all previous years in samples from the Midlands.

      North of Scotland: No samples
      • Grampian: No samples
      • Angus and Perthshire: No samples
      • Borders: No samples
      • Northern England: No samples
      • Midlands: Virus pressure was high. Peach-potato aphids were found at 2 sites (27 at one site). Potato aphids were found at 2 sites. Other potato virus vectors found: black-bean aphid (a good vector of PVA), cabbage aphid, grain aphid, leaf-curling plum aphid, pea aphid, willow-carrot aphid. Twice as many black-bean aphids were found compared with the average for all previous years.
      • East Anglia: Virus pressure was low. Peach-potato aphids were found at 3 sites. Potato aphids were found at 1 site.  Other potato virus vectors found: black-bean aphid (a good vector of PVA), bird-cherry oat aphid, currant-sowthistle aphid, grain aphid, leaf-curling plum aphid, willow-carrot aphid.
      • South West: Virus pressure was moderate. The virus pressure was five times higher than the average for all previous years. Peach-potato aphids were found at 1 site. Twice as many peach-potato aphids were found as the average for previous years. Potato aphids were found at 1 site. Other potato virus vectors found: bird-cherry oat aphid, cabbage aphid, currant-sowthistle aphid, leaf-curling plum aphid, rose-grain aphid, willow-carrot aphid. Three times as many currant-sowthistle aphids were found as the average for all previous years.

      • 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.
      • Cereal aphids: Grain aphids have been found in samples from the Midlands and East Anglia in the last week; Rose-grain aphids have been found in samples from the South-West in the last week.

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