Soybean Aphid in NW Minnesota

June, 2012 - Early season scouting for soybean aphids

Green marker indicates that there have been no aphids identified in the field during early counting.

Red marker indicates that there have been at least one aphid found on at least one plant during early counting.

Click on marker to open information regarding the site's activity.

Changes will be made periodically so please visit frequently for more information.

August 16, 2012 - Field reports based on "Speed Scouting"

Wow, who would have thought that soybean aphid would be this insignificant. We have ended "speed scouting" of the fields we've been monitoring. Of the 18+ fields we have monitored since early July, 90% are R-5 or later. Only some June seeded fields are younger (R-4).


Soybean Growth Stages for Pest Management Decisions
Management decisions on whether to treat soybean aphids will be affected by the soybean growth stage in a field. Historically, we fields reach R-5 to R-6 in the mid-August time frame. This year, fields are running about 10 days ahead of this schedule. As plants progress to the later reproductive stages (e.g., R5, R6, R7, etc.) risk of yield loss from aphids declines to non-economic levels.



The results of scouting reports can be viewed through the Google® Map with the information for a site indicating:

Management Decision -

Green   - Do not Treat
Yellow  - Scout again in 4 days (populations increasing)
Red       - Treat (field has reached threshold)

Other observations -

% Plants with Aphids
% Plants with predators (Lady beetles)
% Plants with fungal infected aphids
% Plants with aphid mummies (parasitized aphids)
 

This map will be updated regularly, so check in even before the weekly notice.

Also, for those who have smartphones and can download Apps, you may receive a notice when you view the map on your phone. It may ask you if you want to download an App button on your menu. If you have this option and elect to do it, one click will bring up the map for viewing. You won't have to go through the web page to look at the updates.

None of this is intended as a substitute for field scouting to determine population levels in your fields. Be sure to check your fields for determining aphid and mite infestations.

For those interested, North Dakota State University reports on surveys for soybean in their IPM survey.

Also, if you need to know more about "Speed Scouting" this link will direct you to an overview of the process.

(What do you think? send your comments to:  glogo001@umn.edu)
 

Soybean aphid Survey

View aphid reports on presence and population levels for northwest Minnesota based on field scouting reports.

Small Grain Survey

View regional maps summarizing current observations in
Wheat and Barley

• May 28 - June 8, 2012
• June 11 to 15, 2012
• June 18 to 22, 2012
• June 25 to 29, 2012
• July 2 to 6, 2012
• July 9 to 13, 2012