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NC Iowa Agronomy Connection Newsletter

May 26, 2022 | Vol. 9, Issue 6


Planting progress and conditions

There has been significant planting progress made across Iowa in the past 10 days.  The NASS Crop Progress Report from May 23 indicated that 86% of corn is planted in Iowa, which was 3% behind the 5-year average and 69% of soybeans are planted, which is 2% ahead of the 5-year average. Even with the relatively dry conditions of last week, we certainly have seen crop planted into less than ideal conditions. Soils are cloddy, seed furrows have remained open, and we have sidewall compaction in many fields. Will we have rootless corn? That remains to be seen and hopefully these recent rains will help close those furrows. Once the crop is emerged is the time to assess stands. Not only are stand counts important, but determining why the stand is not adequate is also important. Seedling disease, insects, herbicide, and planter and planting conditions are all culprits to reduced stand. Planter issues identified this year, may help you adjust for next year. Take note of soil conditions and emergence this year to help make better decisions for future years when considering soil conditions.  Here are some resources: 
Stand Assessments - Corn

Stand Assessments - Beans

Insect Monitoring

The black cutworm scouting advisory goes into effect for the central Iowa crop reporting district tomorrow and for the north central crop reporting district on May 29. Additional information on scouting, injury and management can be found in the ICM article Black Cutworm

Corn rootworm monitoring.  ISU is looking for volunteers to trap corn rootworm beetles this summer.  If you are interested, see Join the Corn Rootworm Adult Monitoring Network in 2022.  Please sign up prior to June 24th. 

Soybean fields needed for soybean aphid monitoring. ISU is looking for a few soybean fields to monitor for pyrethroid resistance in soybean aphid. Ideally aphid would be collected by ISU personnel prior to any treatment, and then again after treatment.  If you are interested, please contact me at 515-231-2830 so I may share more details with you and pass along your information to researchers on campus.

Weed Watch

Each year I get several phone calls about Equisetum control. You may know this as scouring rush and field horsetail as they are two different species. Locally, I hear people refer to this as "snake grass". This latest ICM article, Equisetum: From Ditch to Field, provides a great overview of these species and management options. 

Please consider this your personal invitation attend any of the field days.  They are all free to attend, but some do require pre-registration.  Some have meals provided. 

June 1, 5:30 to 7 p.m.  Redefining the Field Edge Field Day is being sponsored by the Iowa Learning Farms and Iowa State University Extension and Outreach.  Registration is required to account for meals.

June 14.  In-Season Manure Application Field Day.  This event will take place at the ISU Dairy Farm, located at 52470, 260th St, Ames.  Please pre-register for lunch by calling the Story County Extension Office at 515-337-1601.   

June 16, 9 a.m. to noon.  The North Central Iowa Research Association, the Northern Research Farm and ISU Extension and Outreach will sponsor the research farm field day.  A meal will be provided, but registration is not required. This event will be located at the "south" farm, approximately 1.5 miles south of Kanawha.  Speaker details can be found at North Central Research Farm to Hold June Field Day

June 18, 8 a.m. to noon.  The Southfork Watershed Alliance is hosting a bioreactor field day at the Hunt Farm, located at 28989 Hwy 175, Eldora. Parking will be available at the AgVantage FS with a shuttle provided to the site.  Please RSVP by visiting this link
June 23 from 1-3 p.m.  ISU Extension field agronomists Gentry Sorenson, Meaghan Anderson and myself will host a herbicide resistance management field day at the Northern Research Farm (south farm). The goal of this field day is to look at effective modes of action for weed control in corn, herbicide rates, and timing of herbicide applications. There is no need to pre-register for this event. Please follow signs for parking. CCA CEUs are available. 

June 23 from 1-3 p.m.  Meaghan Anderson and I will be hosting a second herbicide resistance management field day that will focus on effective strategies in soybeans. This field day will take place at the A. Knaphus farm located 1 mile south of McCallsburg on S27.  There is no need to register for this event.  Please follow signs for off-road parking.  CCA CEUs are available. 
Angie Rieck-Hinz
Extension Field Agronomist
Cell: 515-231-2830
Twitter: @nciacrops

Calhoun, Cerro Gordo,
Franklin, Hamilton, Hardin,
Humboldt, Webster,
Worth and Wright Counties.
Additional Resources

Integrated Crop Management 

Ag Decision Maker

Iowa Environmental Mesonet

ISU Women in Ag 
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