Assistant Extension Professor
Integrated Pest Mgt Specialist
SWROC - 23669 130th Street
Lamberton, MN 56152
A 2004 - 2010 study at the U of M SWROC examined the effect of crop rotation and management on corn and soybean yields. Intensively managed continuous corn out-yielded conventionally managed rotated and continuous corn but yielded less than invensively managed rotated corn. Both corn and soybean yields were increased by rotation but more than two years of corn were needed to produce a soybean yield response over an annual rotation. This project was conducted by Bruce Potter and funded by the MN Soybean Research and Promotion Council and the MN Corn Research and Promotion Council. Read the entire report (pdf).
All the pestilence that’s fit to print. All newsletter links are .pdf files. To be included on the email list, please send an email to Molly Werner.
Written by: Ken Ostlie, Extension Entomologist and Bruce Potter, IPM Specialist
Since 2009, an increasing number of fields planted to Bt‐RW traited corn have shown unexpected root injury from corn rootworms. Problems were first reported in the SE and SW corners of Minnesota but since then have been reported from an ever wider geography in Minnesota. While the majority of Minnesota reports regarding performance problems have come from VT3 hybrids, all traits have experienced at least occasional problems. Previous data indicates no yield benefit for at‐plant insecticides on Bt‐RW hybrids when the trait is performing well (and no early season stand reducing insect problems occur). A yield response to at‐plant soil insecticide on Bt‐RW traited corn could indicate rootworm damage, and perhaps provide a sign of developing trait resistance.
Data will be collected from around Minnesota and a summary map, which indicates where significant captures have occurred, will be prepared. This map and a short newsletter will be posted to the SWROC website each week. The newsletter will contain information on the black cutworm, its biology, damage to crops and management decisions.
Check out the Youtube Video on Soybean Cyst Nematode created on July 6, 2012. This is just a trial run to test camera techniques and sppeed of turn around. It is crude but I hope it provides some information on scouting SCN. Martin Scorcese we ain't. More seriously, if you think this format is a good way to present techniques on scouting and would like more, let us know and we'll keep practicing.