Update on Nebraska Crop Conditions

by John Toft, Latham RSM
Tekemaha, Nebraska

As reported in Latham’s weekly crop report for June 8, the last few weeks have brought some much needed heat to Nebraska. The University of Nebraska – Lincoln (UNL) reports that we’re more than one week behind on growing degree units (GDUs). The lack of heat explains why so much of our corn and soybean crops have been slow growing and why we’ve had slow emerging corn this season.

While we welcomed the heat, Mother Nature recently brought several other unwelcome conditions to western Iowa and Nebraska. Last Monday’s strong winds, rain and isolated pockets of hail have caused crop injury in some counties.

Wet conditions, combined with injury, make plants ripe for insects and disease. Be on the lookout for especially for Pythium as you’re out scouting fields.

Insects and disease are a real threat, but they pale in comparison to the threats from floodwaters that farmers and ranchers are facing in other parts of this region. Flooding is unprecedented due to record levels of snowfall in the Rocky Mountains, a late snow melt, combined with extra heavy rains in May.

The Missouri River continues to rise. A speaker for the U.S. Army Corps of Engineers reports that it’s like to reach levels surpassing the 1952 flood. A recent article in the Des Moines Register provided an update on how Iowa and Nebraska counties threatened by the flood are good corn-producing regions.

Fortunately, the American spirit is shining through as volunteers continue to do what they can to move people and property to higher ground. Our hearts go out to those whom are affected.

Combating Goss’s Wilt and SDS

Last year Goss’s Wilt and Sudden Death Syndrome (SDS) both reared their ugly heads for many growers throughout the Midwest. Unfortunately for those farmers who had to deal with the effects first-hand, Nick Benson, corn product specialist, and Mark Grundmeier, soybean specialist, say likelihood is they will present challenges for Midwest growers again this year. As we head into planting season, below are some tips to keep top of mind to help battle these diseases.

Tips to Manage Goss’s Wilt

  • Hybrid selection. One of the best ways to protect against Goss’s Wilt is hybrid selection. If you battled Goss last year, Nick recommends either rotating to beans, or planting only highly resistant hybrids to help avoid significant yield loss.
  • Bacteria versus fungus. Nick says oftentimes farmers will spray fungicide and believe they’re taking care of diseases like Goss’s Wilt, but because Goss’s is bacterial, the fungicide has no effect. To help farmers identify corn diseases, Iowa State University Extension has compiled a helpful Scouting Guide available here.
  • Tillage. Because Goss’s overwinters in the previous year’s crop residue, tillage will help prevent spread. If a field was affected by Goss last year, aggressive tillage Nick recommends aggressive tillage to help suppress the susceptibility for the coming year.

Tips to Manage SDS

When SDS spread last year, Mark compiled a video series with tips from variety selection to SDS management to help farmers in the field. Below is a video about how to prevent SDS prevention. If time allows, take just a few minutes to read Mark’s previous blog posts that offer tips to help you identify and manage SDS.

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New Tool to ID Soybean Diseases

A colorful, 36-page guide with information on 24 soybean diseases is now available for free – including shipping – through Iowa State University Extension’s online store at www.extension.iastate.edu/store.

“Soybean Diseases” (CSI 0004), gives farmers a comprehensive look at soybean diseases and outlines management options once the disease is identified.

The publication was written by Daren Mueller, Extension specialist; Alison Robertson, plant pathologist; Greg Tylka, nematologist; and Adam Sisson with the ISU Corn and Soybean Initiative. Funding was supplied by the Iowa Soybean Checkoff, Iowa Soybean Association and ISU Extension.