Blog

Madelynn Connell
July 27, 2020 6:12 PM

Danielle M Clark (Wilson)
July 27, 2020 6:12 PM

Emily Heaton
July 27, 2020 6:12 PM

Growing up on his family’s farm, Steve Schomberg learned the importance of environmentalism by his father. Conservation and sustainability remained central to Steve’s life while he worked at the University of Illinois, which is where he first learned about miscanthus and its use as a biomass...

Crop Production

Denise Schwab
July 27, 2020 11:22 AM

Rebecca Vittetoe
July 27, 2020 11:22 AM

One option to consider in fields with severe storm damage with no or limited yield potential is annual forages. This option may especially be of interest to livestock producers who could utilize the forage or may be short on forage or feed as a result of the storm damage. The following...

Crop Production

Paul Kassel
July 26, 2020 8:37 AM

 Iowa State University Extension and Outreach in Pocahontas and Sac county will hold meetings to discuss the effects of the current drought on crops and livestock.

 

The Sac county meeting will be held on Thursday August 6 at the Sac County Fairgrounds 4-H Building at 416 Park...

Crop Production

Mark Licht
July 24, 2020 2:08 PM

Zachary Clemens
July 24, 2020 2:08 PM

Low rainfall and high temperatures recently have caused some drought stress on local crops this summer. This is not wholly unexpected and there are some strategies crop producers can do to minimize the damage.

Higher nighttime temperatures cause plants to have higher nighttime respiration...

Crop Production

Daren Mueller
July 24, 2020 10:53 AM

Adam Sisson
July 24, 2020 10:53 AM

Crop scouts and field researchers now have a new tool at their disposal to help correctly estimate disease severity and insect defoliation in field crops. The new online tool has been created by the Crop Protection Network and can be...

Insects and Mites, Plant Diseases

Rebecca Vittetoe
July 21, 2020 9:16 PM

While parts of southern Iowa did receive some much needed rain, the western part of the state continues to be dry with parts considered to be in a D2 or severe drought. Besides the weather concerns, other common...

Crop Production

Erin Hodgson
July 18, 2020 11:30 AM

Ashley Dean
July 18, 2020 11:30 AM

With several severe weather events in Iowa this month, reports of lodged corn are coming our way. Often times, a small part of the field is flattened and would be difficult to see from the edge. I encourage you to get out into cornfields and see how your stands look this month. In some cases,...

Crop Production, Insects and Mites

Erin Hodgson
July 16, 2020 10:49 AM

I was recently asked about an alien-looking caterpillar from central Nebraska. I occasionally see silver-spotted caterpillars in Iowa and wondered if you were seeing any in soybean?

The caterpillars are definitely a unique species because of the body coloration! The bodies are yellow-...

Crop Production, Insects and Mites

Rebecca Vittetoe
July 15, 2020 7:15 AM

While the western part of the state continues to be on the dry side, parts of central and eastern Iowa got hit with some storms this past week resulting in wind and hail damage. Besides the dry conditions and storm damage, herbicide injury in soybeans, gray leaf spot, potato leafhoppers, and low...

Crop Production

Adam Sisson
July 14, 2020 8:38 AM

Daren Mueller
July 14, 2020 8:38 AM

Alison Robertson
July 14, 2020 8:38 AM

Hailstones damaged corn and soybean in multiple locations across Iowa on July 11, 2020.  Fungicide use after hail injury is sometimes suggested as a way to benefit damaged plants. In order to help determine if fungicide use after hail is beneficial, Iowa State University undertook multiple years...

Crop Production, Plant Diseases

Rebecca Vittetoe
July 13, 2020 2:19 PM

The storms that moved across Iowa late last week and over the weekend brought rainfall, but they also brought some strong winds and hail. For those folks dealing with wind or hail damage, the first step should be to communicate with your crop insurance agent. Additionally, below are some...

Crop Production

Mark Licht
July 13, 2020 1:24 PM

In 2018 and 2019, research was conducted on a relay intercropping and double cropping systems to evaluate as a possible alternative to Iowa’s traditional corn-soybean or continuous corn cropping system.

There were 2 sites; one near Kalona and another near Ames, Iowa, to study these...

Crop Production

Mitchell Baum
July 10, 2020 2:55 PM

Sotirios Archontoulis
July 10, 2020 2:55 PM

Mark Licht
July 10, 2020 2:55 PM

Each year, decisions on planting date and cultivar selection are the major deciding factors on yield potential. Under current, year-to-year variable weather patterns and future climate change these decisions have become much more important. And there is a known knowledge gap on how future...

Crop Production

Tyler White
July 9, 2020 2:40 PM

Mark Licht
July 9, 2020 2:40 PM

For a couple of years, some Iowa farmers have noticed lower yields along the southern and/or western edges of their fields. The low yields along the border tend to be prevalent when soybean, hay, or pasture are growing adjacently to the field on the southern or western edge. This phenomenon...

Crop Production

Daren Mueller
July 8, 2020 11:21 AM

Now is the time when decisions to apply a foliar fungicide in soybeans are being made. As you are making that decision, this is a quick reminder that fungicide resistance, particularly to the quinone outside inhibitor (QoI) fungicides (FRAC Code 11), has been found to be widespread in Iowa in...

Plant Diseases

Mark Licht
July 8, 2020 10:23 AM

Sotirios Archontoulis
July 8, 2020 10:23 AM

Since July 1 high humidity and temperatures have been scorching Iowa. Okay, maybe that is a little extreme. June has led to dry conditions across much of central and southwest Iowa. Heat and dry weather are not desired weather conditions in the 2 weeks before or after pollination. This four-week...

Crop Production

Bob Hartzler
July 8, 2020 7:00 AM

Prashant Jha
July 8, 2020 7:00 AM

There is no question that dicamba injury across the Iowa landscape in 2020 is the most extensive it has been since the introduction of dicamba in the 1960s. ISUEO field agronomists and commercial agronomists in several areas of the state report nearly all non-dicamba resistant soybean are...

Weeds

Rebecca Vittetoe
July 7, 2020 9:49 PM

Limited rainfall and the warmer temperatures causing crop stress, herbicide injury in soybeans, soybean gall midge, and Japanese beetles were some of the common issues or concerns that ISU Extension field agronomists saw in fields across the state this last week. Read on to see what’s happening...

Crop Production

Meaghan Anderson
July 7, 2020 8:26 AM

Angie Rieck-Hinz
July 7, 2020 8:26 AM

Extension specialists in Iowa and Minnesota are again collaborating to provide a series of short webinars for farmers, ag professionals, Extension personnel and other interested parties from July 14 to July 23. The theme is “Essential Row Crop Management" for summer 2020, with a focus on key...

Crop Production, Insects and Mites, Plant Diseases

Bob Hartzler
July 3, 2020 10:20 AM

Nearly 20 years ago I summarized research from the University of Minnesota investigating factors that influence volatilization of dicamba (Behrens and Lueschen. 1979. Dicamba volatility. Weed Sci...

Weeds

Erin Hodgson
July 2, 2020 3:27 PM

After visiting several ISU Research and Demonstration Farms this week, our summer crew started seeing caterpillars in soybean plots. Many species are possible at once, but rarely do they cause economic injury in Iowa. Defoliation must exceed 20% after bloom to justify a rescue foliar treatment...

Crop Production, Insects and Mites

Rebecca Vittetoe
June 30, 2020 10:38 PM

Lack of moisture in the western part of the state to excess moisture in the eastern part of the state, herbicide injury in soybeans, and bacterial leaf streak in corn were the common issues or concerns that ISU Extension field agronomists saw and heard about this past week. Read on to see what’s...

Crop Production

Meaghan Anderson
June 29, 2020 6:46 PM

Bob Hartzler
June 29, 2020 6:46 PM

We’ve seen more herbicide injury to soybean than I recall in past summers, resulting in questions about determining the source and reasons for the damage. This ICM Blog will share some tips on identifying herbicide injury we’ve seen this summer in soybean fields.

Crop injury may be caused...

Weeds, Herbicide Resistance

Paul Kassel
June 25, 2020 10:01 PM

Bob Hartzler
June 25, 2020 10:01 PM

There have been a few fields where topramezone – the active ingredient in Impact and Armezon – carried over from an application last June – and is injuring this year’s soybean crop. Other agronomists have reported carryover of other Group 27 herbicides on soybean this year (mesotrione,...

Crop Production

Mark Licht
June 25, 2020 1:09 PM

Zachary Clemens
June 25, 2020 1:09 PM

 M. Licht).
Leaf ripples and yellowing shortly after the whorl unfurls...

Crop Production

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