Friday, August 22, 2014

Soybean Aphid Populations mixed, Field Infestations can be quite Different

A quick survey of soybeans around the northwest MN region revealed great variability in soybean aphid populations. 

Some fields have not required treatment, many fields have been treated and are in good shape, other fields not treated may have quite variable numbers and often are related to growth stage with R3 fields still vulnerable to losses from threshold populations.

Re-Launch of the Forage Quarterly newsletter

Welcome to a resumption of the Forage Quarterly newsletter. It will provide an informational outlet for the UMN Forage Team.

Workshop on Goss's Wilt of corn and Herbicide Mode of Action

Advanced Field Crop Workshop Crookston, MN

Tuesday, August 26, 2014

8:30 AM - 12:00 Noon


The University of Minnesota Institute for Ag Professionals is offering a half-day training workshop on Goss's Wilt of corn and Herbicide Mode of Action at the Northwest Research and Outreach Center in Crookston, MN on Tuesday, August 26th.  Dr. Dean Malvick, Extension Corn and Soybean Plant Pathologist, Dr. Jeff Gunsolus, Extension Weed Specialist, and Dave Nicolai, Extension Crops Educator will lead the workshop.

Total Tillage Solutions Field Day on September 4th

Total Tillage Solutions Field Day
September 4, 2014
9:00 am - 3:30 pm
 
8 miles South of Appleton, Minnesota


Have you ever wondered what your shanks, coulters and disks are doing to the soil after tilling?  

Wonder no more!  We have created man-made soil pits that will show how the soil, fertilizer and residue are mixing and moving through the soil profile.  

Wednesday, August 13, 2014

Soybean aphid thresholds demystified - a satirical examination

prepared by Bruce Potter, IPM Specialist SW MN
University of Minnesota Southwest Research and Outreach Center, Lamberton


Before anyone gets too bent out of shape over this... Yes, I know this is a stressful time for some soybean growers, most of their advisers and for aphid researchers too.   It is not illegal to apply insecticide to any population of soybean aphids as long as it is within label restrictions.  Finally, I am not the police and it's the soybean farmer's money, not mine, at risk. Insecticide resistance does tend to spread itself around though.

Based on emails and phone calls, there seem to be several economic (action) thresholds for soybean aphids in use now.

Friday, August 1, 2014

So you don't like counting aphids

Here is an overview of "Speed Scouting" for soybean aphid that was written in 2012. The information is helpful if you don't like counting aphids but still want to make an assessment of what is happening with aphids and whether treatment is economically justified.

Thursday, July 31, 2014

Soybean Aphid migration, colonization and infestations underway!

Soybean aphid migration is underway in NW Minnesota. Scouting indicates winged aphids are being found in fields. In some fields, the small infested hot spots (3-4 row feet of heavily infested plants) are more readily detected.

Scouting fields needs to begin in earnest to determine where your fields are in the process. The following link will take you to a refresher on aphid biology, scouting and treatment decision making.

http://www.extension.umn.edu/agriculture/soybean/pest/docs/soybean-aphid-scouting.pdf

More updates as this progresses . . .