May 11, 2016 Weekly Crop & Weather Update

This update is also available in a print-friendly pdf format: May 11, 2016 Weekly Crop & Weather Update

Below you will find the daily maximum and minimum air temperatures, 2-inch average and 25-year soil temps, growing degree units, and 24-hour precipitation amounts for this week. These values are recorded at 8 AM and reflect the conditions for the previous 24-hour period (8 AM to 8 AM) at the Southern Research & Outreach Center, Waseca. 

Air Temp (oF) 2" Soil Temp* Growing Precip
Date Max Min 2016 25-Yr Avg Degree Units (inches)
Thursday, 5/5 68 41 58 58 9.0 -
Friday, 5/6 78 44 59 57 14.5 -
Saturday, 5/7 91 55 64 58 20.5 0.01
Sunday, 5/8 70 39 61 57 10.0 -
Monday, 5/9 76 42 63 56 13.0 -
Tuesday, 5/10 60 51 57 59 5.5 0.99
Wednesday, 5/11 61 50 56 59 5.5 -
*bare soil

The weather this week brought something for everyone, from hot dry weather to a cold rain. Temperature averaged 59 degrees or 3.1 degrees warmer than normal. Rainfall totaled 1.00 inch, which is 0.13 inch above normal. Soil temperature at the 2-inch depth averaged 59.7 degrees or about two degrees above normal. Growing degree units (GDUs) totaled 77.5 this week, 17% above normal. Since May 1 we have accumulated 103.5 GDUs. This is 10% more than normal.

Last year this week was warm and dry. Temperature averaged 58.2 degrees and rainfall totaled 0.42 inch, we had accumulated 119 GDUs.

Corn planted by April 22 has emerged while corn planted on April 27 is just starting to emerge. We have soybeans planted on April 11 that are up. Soybeans planted on April 27 have sprouted but have not yet emerged. The sprouts appear to be in fine condition and should emerge when warmer temperatures arrive. Many have chosen to use soil applied herbicides in both corn and soybeans. This rain will be good for activating these herbicides which usually results in better performance.

Black cutworm larvae can cause damage to corn seedlings at the early stage. For information on black cutworms from the University of Minnesota black cutworm reporting network read the following link.

Follow us on Twitter at: @SROCcrops and find us on Facebook at University of MN Southern Research & Outreach Center. As always, check your email for the Weekly Crop and Weather Update throughout the growing season.