Aphid Alert 1999, No. 4, July 6

Summer 1999: Aphid trapping data.

Results reported in this issue of Aphid Alert are total captures of winged aphids and species identifications for the following locations and sampling interval end-dates. Data for missing locations will be incorporated into this week's issue of the newsletter as it becomes available.

During the week ending 6 July, total aphid captures were 254, i.e, 21.1 aphids per location compared to 20.4 aphids per location the previous week. Turnip aphid, Lipaphis erysimi (Kaltenbach), (78 aphids) and bird cherry-oat aphid, Rhopalosipum padi (L.), (59 aphids) and were the most abundant aphid species in the traps. Green peach aphids were captured at three locations, Crookston (3 aphids), Linton (4 aphids), and Mandan (1 aphid). Dr. Lockhart tested these green peach aphids using immunocapture-PCR and found that they were NOT carrying potato virus Y (PVY) or potato leafroll virus (PLRV). No positives have been reported yet this year. The first positive for PLRV last year was 6 July.

We maintain a list of e-mail addresses to facilitate communication with those of you interested in receiving updates about this research or any resulting advisories sooner than this information can be delivered by mail or even before it is posted on the WWW. If you wish your name added to receive such messages please send us an e-mail at radcl001@umn.edu. In the message, write "Aphid Alert subscribe."

Errors: If you find errors, typographic or factual, we would appreciate having them called to our attention so they can be corrected. Phone: Robert Suranyi (218) 773-3346 or Ted Radcliffe (612) 624-773 or send an e-mail to radcl001@umn.edu.

 

Results

Minnesota: Baker, Climax, Crookston, Gully, Hollandale, Karlstad, Little Falls, Morris, Williams
North Dakota: Cando, Hoople, Linton, Mandan, Rolette, Walhalla

Baker, MN, week ending 9 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid 3 3.2
  potato aphid 5 5.4
       
PVY vectors bird cherry-oat aphid 21 22.6
  corn leaf aphid    
  English grain aphid 1 1.1
  greenbug    
  sunflower aphid 1 1.1
  thistle aphid 16 17.4
  turnip aphid 14 15.2
       
Identified non-vector species   10 10.9
       
Unidentified   22 24.9
  Total 93  

back to top

Climax, MN, week ending 6 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid    
  potato aphid    
       
PVY vectors bird cherry-oat aphid 5 62.5
  corn leaf aphid    
  English grain aphid    
  greenbug    
  sunflower aphid    
  thistle aphid 1 12.5
  turnip aphid    
       
Identified non-vector species   1 12.5
       
Unidentified   1 12.5
  Total 8  

back to top

Crookston, MN, week ending 5 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid 3 3
  potato aphid 2 2
       
PVY vectors bird cherry-oat aphid 23 23
  corn leaf aphid    
  English grain aphid 5 5
  greenbug    
  sunflower aphid 3 3
  thistle aphid 6 6
  turnip aphid 50 50
       
Identified non-vector species   1 1
       
Unidentified   7 7
  Total 100  

back to top

 

Gully, MN, week ending 6 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid    
  potato aphid    
       
PVY vectors bird cherry-oat aphid 7 63.4
  corn leaf aphid    
  English grain aphid 1 9.1
  greenbug    
  sunflower aphid    
  thistle aphid    
  turnip aphid    
       
Identified non-vector species   1 9.1
       
Unidentified   2 18.2
  Total 11  

back to top

Hollandale, MN, week ending 6 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid    
  potato aphid    
       
PVY vectors bird cherry-oat aphid 1 25
  corn leaf aphid    
  English grain aphid    
  greenbug    
  sunflower aphid    
  thistle aphid 2 50
  turnip aphid    
       
Identified non-vector species      
       
Unidentified   1 25
  Total 4  

back to top

Karlstad, MN, week ending 6 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid    
  potato aphid    
       
PVY vectors bird cherry-oat aphid 2 16.7
  corn leaf aphid 4 33.3
  English grain aphid    
  greenbug    
  sunflower aphid    
  thistle aphid 1 8.3
  turnip aphid    
       
Identified non-vector species   1 8.3
       
Unidentified   4 33.3
  Total 12  

back to top

Little Falls, MN, week ending 5 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid 1 3.6
  potato aphid 1 3.6
       
PVY vectors bird cherry-oat aphid 14 50
  corn leaf aphid    
  English grain aphid 3 10.7
  greenbug    
  sunflower aphid    
  thistle aphid 2 7.1
  turnip aphid 2 7.1
       
Identified non-vector species   1 3.6
       
Unidentified   4 14.3
  Total 28  

back to top

Morris, MN, week ending 6 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid 8 8.7
  potato aphid 3 3.3
       
PVY vectors bird cherry-oat aphid 2 2.2
  corn leaf aphid    
  English grain aphid 2 2.2
  greenbug 1 1.1
  sunflower aphid    
  thistle aphid 48 52.2
  turnip aphid 8 8.7
       
Identified non-vector species   5 3.1
       
Unidentified   15 18.8
  Total 92  

back to top

Williams, MN, week ending 6 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid    
  potato aphid 1 14.3
       
PVY vectors bird cherry-oat aphid 4 57.1
  corn leaf aphid 1 14.3
  English grain aphid 1 14.3
  greenbug    
  sunflower aphid    
  thistle aphid    
  turnip aphid    
       
Identified non-vector species      
       
Unidentified      
  Total 7  

back to top

Cando, ND, week ending 2 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid    
  potato aphid    
       
PVY vectors bird cherry-oat aphid 1 50
  corn leaf aphid 1 50
  English grain aphid    
  greenbug    
  sunflower aphid    
  thistle aphid    
  turnip aphid    
       
Identified non-vector species      
       
Unidentified      
  Total 2  

back to top

Hoople, ND, week ending 5 July

Data not available

back to top

Linton, ND, week ending 5 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid 4 8
  potato aphid 13 26
       
PVY vectors bird cherry-oat aphid 1 2
  corn leaf aphid    
  English grain aphid 1 2
  greenbug    
  sunflower aphid 1 4
  thistle aphid    
  turnip aphid 17 34
       
Identified non-vector species   1 2
       
Unidentified   11 22
  Total 50  

back to top

Mandan, ND, week ending 5 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid 1 6.7
  potato aphid 2 13.3
       
PVY vectors bird cherry-oat aphid    
  corn leaf aphid    
  English grain aphid    
  greenbug    
  sunflower aphid    
  thistle aphid    
  turnip aphid 2 13.3
       
Identified non-vector species   5 33.3
       
Unidentified   5 33.3
  Total 15  

back to top

Rolette, week ending 2 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid    
  potato aphid    
       
PVY vectors bird cherry-oat aphid    
  corn leaf aphid 1 8.3
  English grain aphid    
  greenbug    
  sunflower aphid 6 50
  thistle aphid    
  turnip aphid    
       
Identified non-vector species      
       
Unidentified   5 41.7
  Total 12  

back to top

Walhalla, ND, week ending 1 July

  Aphid species # captured % of total capture
PLRV/PVY vectors green peach aphid    
  potato aphid 1 16.7
       
PVY vectors bird cherry-oat aphid 4 66.7
  corn leaf aphid    
  English grain aphid 1 16.7
  greenbug    
  sunflower aphid    
  thistle aphid    
  turnip aphid    
       
Identified non-vector species      
       
Unidentified      
  Total 6  

back to top