Aphid Alert

No. 14, posted
17 September, 1999

Published cooperatively by
departments of Entomology & Plant Pathology,
College of Agricultural, Food and Environmental Sciences,
University of Minnesota,
the University of Minnesota Extension Service,
and the State Seed Potato Programs of
Minnesota and North Dakota

Funding provided by:
1998 Minnesota State Legislature
& United States Department of Agriculture,
Cooperative State Research, Education and Extension Service,
Integrated Pest Management Program,
North Central Region

WWW address: http://ipmworld.umn.edu/alert.htm

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. At some locations the potato crop has been harvested. If additional data is received for locations not reported on this page (no data) that data be incorporated into this week's issue of the newsletter once the samples have been received and sorted.

Baker, MN 13 September	Climax, MN 13 September	Gully, MN 13 September	Hollandale, MN No data
Karlstad, MN No data	Little Falls, MN No data	Morris, MN No data	Williams, MN No data
Cando, MN 10 September	Hoople, ND 10 September	Linton, ND No data	Mandan, ND No data
Rolette, ND 10 September	Walhalla, ND 10 September

Figure 1 (below). Mean number of winged green peach aphid captured per trap across all locations reported, 1998 data (blue line) and 1999 data (maroon line). These data are also available in table format (Table 1).

Figure 2 (below). Mean number of winged aphids of species known to be capable of transmitting PVY (exclusive of green peach aphid) captured per trap across all locations reported, 1998 data (blue line) and 1999 data (maroon line). These data are also available in table format (Table 1).

SUMMARY OF OBSERVATIONS FOR WEEK ENDING 13 SEPTEMBER.

Winged green peach aphids were captured at only one location, Hoople, ND, during the week ending 13 September. Other aphid species that are potential vectors of PVY averaged 4.11 per trap across all locations. Thus, aphid numbers continued to decline for the fourth week in a row. Trap capture data is reported here for only 9 of the 14 stations in the network. Any missing data will be added to this WWW report as it becomes available and associated files will be updated accordingly. PCR tests to determine if the captured green peach aphids were carrying virus will be reported here when the tests are completed. Next week will be the final week of aphid sampling for the 1999 season.

A article describing the Aphid Alert project has been submitted for publication in the September issue of the World Potato Congress Newsletter. Advance copy of the submitted article has been posted on our server for your information, Aphid Alert: A research/outreach initiative addressing potato virus problems in the northern Midwest.

The text of the WPC newsletter article is similar to a proposal we shall submit next week to the University of Minnesota, College of Agriculture, Food and Environmental Sciences, Rapid Agricultural Response Fund, requesting continued funding of this project for three more years.

A number of you have written letters in support of continuyed funding of this project. We thank you for your support, it is really appreciated. If any of our readers have suggestions for improvement of this project, please send us e-mail.

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

Baker, MN, week ending 13 September
	Aphid species	# captured	% of total capture
PLRV/PVY vectors	green peach aphid
	potato aphid

PVY vectors	bird cherry-oat aphid	7	46.7
	corn leaf aphid	6	40.0
	English grain aphid
	greenbug
	sunflower aphid
	thistle aphid
	turnip aphid

Identified non-vector species

Unidentified		2	13.3

	Total	15

Climax, MN, week ending 13 September
	Aphid species	# captured	% of total capture
PLRV/PVY vectors	green peach aphid
	potato aphid

PVY vectors	bird cherry-oat aphid
	corn leaf aphid	3	75.0
	English grain aphid
	greenbug
	sunflower aphid
	thistle aphid
	turnip aphid

Identified non-vector species

Unidentified		1	25.0

	Total	4

Gully, MN, week ending 13 September
	Aphid species	# captured	% of total capture
PLRV/PVY vectors	green peach aphid
	potato aphid

PVY vectors	bird cherry-oat aphid	2	8.7
	corn leaf aphid	20	87.0
	English grain aphid	1	4.3
	greenbug
	sunflower aphid
	thistle aphid
	turnip aphid

Identified non-vector species

Unidentified

	Total	23

Hollandale, MN, week ending 13 September
	Aphid species	# captured	% of total capture
Data not available

Karlstad, MN, week ending 8 September
	Aphid species	# captured	% of total capture
PLRV/PVY vectors	green peach aphid
	potato aphid

PVY vectors	bird cherry-oat aphid
	corn leaf aphid
	English grain aphid
	greenbug
	sunflower aphid
	thistle aphid
	turnip aphid

Identified non-vector species

Unidentified		1	100.0

	Total	1

Little Falls, MN, week ending 13 September
	Aphid species	# captured	% of total capture
Data not available

Morris, week ending 13 September
	Aphid species	# captured	% of total capture
Data not available

Williams, week ending 6 September
	Aphid species	# captured	% of total capture
PLRV/PVY vectors	green peach aphid
	potato aphid

PVY vectors	bird cherry-oat aphid	15	12.0
	corn leaf aphid	104	83.2
	English grain aphid	1	0.8
	greenbug
	sunflower aphid	3	2.4
	thistle aphid
	turnip aphid

Identified non-vector species

Unidentified		2	1.6

	Total	125

Cando, week ending 10 September
	Aphid species	# captured	% of total capture
PLRV/PVY vectors	green peach aphid
	potato aphid

PVY vectors	bird cherry-oat aphid	1	33.3
	corn leaf aphid	1	33.3
	English grain aphid
	greenbug
	sunflower aphid
	thistle aphid
	turnip aphid	1	33.3

Identified non-vector species

Unidentified

	Total	3

Hoople, week ending 10 September
	Aphid species	# captured	% of total capture
PLRV/PVY vectors	green peach aphid	12	46.2
	potato aphid	1	3.8

PVY vectors	bird cherry-oat aphid	1	3.8
	corn leaf aphid	11	42.3
	English grain aphid	1	1.3
	greenbug
	sunflower aphid
	thistle aphid
	turnip aphid	1	33.3

Identified non-vector species

Unidentified

	Total	26

Linton, ND, week ending 13 September
	Aphid species	# captured	% of total capture
Data not available

Mandan, ND, week ending 13 September
	Aphid species	# captured	% of total capture
Data not available

Rolette, week ending 10 September
	Aphid species	# captured	% of total capture
PLRV/PVY vectors	green peach aphid
	potato aphid

PVY vectors	bird cherry-oat aphid	2	50.0
	corn leaf aphid	1	25.0
	English grain aphid
	greenbug
	sunflower aphid	1	25.0
	thistle aphid
	turnip aphid

Identified non-vector species

Unidentified

	Total	4

Walhalla, ND, week ending 10September
	Aphid species	# captured	% of total capture
PLRV/PVY vectors	green peach aphid
	potato aphid

PVY vectors	bird cherry-oat aphid
	corn leaf aphid	3	60.0
	English grain aphid	1	20.0
	greenbug
	sunflower aphid
	thistle aphid
	turnip aphid

Identified non-vector species

Unidentified		1	20.0

	Total	5

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Last modified: Friday, 17 September, 1999
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