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Showing posts from May, 2016

Recovering from Cold Temperatures and Frost

Abnormally cold temperatures and frost created significant injury in most corn and some soybeans.  Many soybeans were planted late enough that they had yet to emerge by the time of the cold temperatures and frost on 5/14/16 and 5/15/16.  By and large soybeans were spared from the frost, that said, several thousand acres of early planted soybeans will be replanted in Southeastern Minnesota.

Corn injury and recovery appears to be influenced by planting date.  Reports from the earliest planted corn (4-10-16 to 4-12-16) are that injury was not too significant and that they have recovered well.  I have not validated these claims with any of my own observations.

The second corn planting date, around April 19th, sustained serious damage and has had the most difficult recovery.  My infield observations are that stands have not been reduced by much, if at all, by the frost. That said, the crop has come back unevenly and upwards of 20,000 of plants per acre remain buggy-whipped or tied up as of …

Watch for Giant Ragweed Emerging in Early Planted Soybeans

May 13, 2016

Southeastern Minnesota has been busy planting corn and soybeans over the past 4 weeks.  Much of the corn was in before the end of April and several fields of soybeans were planted before the calendar was changed to May as well.  Once May came, there were many good planting days, so much of the soybean crop is now in the ground, too.  It is great to have the crop in the field, isn't it.  For a number of folks, there were also windows of opportunity to apply preemergence herbicides on both crops.

Applied or not, the next job on the list is to watch the emergence of your crop and weeds.  An early planting favors giant ragweed, one of our first troublesome weeds out of the ground.  We already have seedling giant ragweed in our corn herbicide trials (planted April 25).  The plots with no preemergence herbicides or ones with herbicides weak on giant ragweed have a nice carpet of seedlings in them.  The message, this weed grows quickly and can pass the 2-3 inch mark very qui…