Blog

Ashley Dean
May 12, 2021 2:03 PM

Black cutworm remains the dominant moth species captured by cooperators in our trapping network. During Week 6 of the Iowa Moth Trapping Network, our cooperators reported 73 total black cutworm (BCW) and 34 true armyworm (TAW) moths.

Week 6 report:

The TAW moths...

Crop Production, Insects and Mites

Rebecca Vittetoe
May 11, 2021 10:34 PM

This past week brought some much needed and welcomed rain across the state. Planting is getting on the downhill slide with corn planting about 86% complete and soybean planting about 67% complete across the state according to the...

Crop Production

Angie Rieck-Hinz
May 11, 2021 7:46 PM

The May 10 USDA-NASS Iowa Crop Progress Report showed 86% of the Iowa corn crop is planted and 22% is emerged; soybeans are 67% planted and 6% emerged....

Crop Production

Erin Hodgson
May 11, 2021 1:03 PM

Meaghan Anderson
May 11, 2021 1:03 PM

Ashley Dean
May 11, 2021 1:03 PM

I am always surprised to find insect abundance and diversity when scouting in alfalfa. It never disappoints. At any point in the growing season, one is likely to find 20+ species of potential pests feeding on foliage. However, finding a lot of different insects at one time doesn’t necessarily...

Insects and Mites

Mark Licht
May 10, 2021 2:06 PM

Zachary Clemens
May 10, 2021 2:06 PM

Planting conditions in April were pretty good for planting. In fact, there were many reports of planting in early April. Unfortunately, April was much cooler and dryer than normal. Early planted corn and soybean took longer to germinate and emerge because of these cooler conditions. Additionally...

Crop Production

Ashley Dean
May 6, 2021 1:43 PM

The weather warmed up a bit during Week 5 (April 25 to May 1), and the moths were flying more than previous weeks. During Week 5 of the Iowa Moth Trapping Network, our cooperators reported 97 total black cutworm (BCW) and 33 true armyworm (TAW) moths.

Week 5 report:...

Crop Production, Insects and Mites

Rebecca Vittetoe
May 4, 2021 3:07 PM

A lot of planting progress was made for both corn and soybeans over the last week. According to the May 3 USDA-NASS Crop Progress Report, approximately...

Crop Production

Ashley Dean
April 29, 2021 3:10 PM

Cooler conditions continued into week 4, resulting in relatively few moths being caught across the state. During week 4 of the Iowa Moth Trapping Network (April 18 to April 24), our cooperators reported 56 total black cutworm (BCW) and 15 true armyworm (TAW) moths.

You may be wondering...

Crop Production, Insects and Mites

Zachary Clemens
April 29, 2021 1:58 PM

Soybean research and Extension specialists from land-grant universities across the country welcome you to join a monthly informal discussion on production topics that have timely relevance. By joining the Notes from the Field webinar series, you will get highlights and current issues from across...

Crop Production

Erin Hodgson
April 28, 2021 2:38 PM

Ashley Dean
April 28, 2021 2:38 PM

Just last week, Ashley Dean predicted overwintering mortality of bean leaf beetle in Iowa. It looked pretty grim for this soybean pest, with over 77% mortality predicted for central...

Crop Production, Insects and Mites

Meaghan Anderson
April 28, 2021 10:06 AM

Like in prior springs, we often see a trend in the weed identification questions in certain parts of the state. This spring, a small mustard species with finely-divided (I like to say frilly or lacy) leaves is the most frequent plant requiring identification by our clients. There are several...

Weeds

Rebecca Vittetoe
April 27, 2021 9:38 AM

It’s been an unusual spring with the cooler and drier conditions. While many would welcome a rain, the warmer conditions mean planting has gotten underway. Iowa State University Extension and Outreach field agronomists share reports on what they are seeing and hearing in their respected regions...

Crop Production

Meaghan Anderson
April 27, 2021 8:29 AM

Mark Licht
April 27, 2021 8:29 AM

While the warm weather has finally arrived for planting season, dry soil is becoming an increasing concern in parts of the state. In addition to concerns about subsoil moisture, some fields have had significant surface drying, particularly in areas with more tillage this spring. Dry soil...

Crop Production

Ashley Dean
April 26, 2021 12:02 PM

During week 3 of the Iowa Moth Trapping Network (April 11 to April 17), our cooperators reported 62 total black cutworm (BCW) and 9 true armyworm (TAW) moths. Cooler conditions recently may have slowed down moth migration into the state, but black cutworm remains the dominant species caught in...

Crop Production, Insects and Mites

Sotirios Archontoulis
April 22, 2021 3:03 PM

The optimum rate of Nitrogen fertilizer application on corn varies from year to year and from field to field. Here we provide simulation data to aid decision making.

We simulated 25,000 fields across the U.S. Corn Belt from 1984 to 2021 using the Agricultural Production Systems sIMulator...

Crop Production

Sotirios Archontoulis
April 22, 2021 2:42 PM

Mark Licht
April 22, 2021 2:42 PM

The concern for not having enough water during the 2021 growing season is increasing. Observations from Iowa fields (i.e., deep soil samples and tile drainage experiments), and analytical frameworks (i.e., Drought monitor) indicate below normal moisture in parts of Iowa. Here, we benchmark the...

Crop Production

Paul Kassel
April 21, 2021 10:10 PM

Subsoil moisture levels have improved for 2021 crop production.

Iowa State University has completed their spring survey of subsoil moisture in northwest Iowa, says Paul Kassel, ISU Extension and Outreach Field Agronomist located in Spencer.  The amount of subsoil moisture is sampled in...

Crop Production

Adam Sisson
April 21, 2021 7:50 AM

The Crop Protection Network (CPN) has produced a new web book called Fungicide Use in Field Crops. Fungicides are an important crop protection tool for modern...

Pesticide Education, Plant Diseases

Warren Pierson
April 19, 2021 11:10 AM

The 2021 Virtual Crop Scout School is now available and is free to the general public. The scout school consists of 22 webinars from crop protection specialists at eleven Midwest Universities and is offered through the...

Crop Production, Insects and Mites, Plant Diseases, Soils, Soil Fertility, Weeds, Herbicide Resistance

Meaghan Anderson
April 19, 2021 10:12 AM

Rebecca Vittetoe
April 19, 2021 10:12 AM

It’s hard not to be itching to get in the field and start planting, especially since we are past the April 11th crop insurance date for planting. However, the optimum planting date is dictated by soil conditions (moisture and temperature), the weather forecast, and the calendar date...

Crop Production

Mark Licht
April 16, 2021 11:07 AM

Alison Robertson
April 16, 2021 11:07 AM

With cool weather conditions potentially causing delays in cover crop termination, what options are available? Cereal rye ahead of soybean is not nearly as problematic. While planting green may not be advised for beginning cover crop users, more experienced cover crop users have...

Crop Production

Angie Rieck-Hinz
April 15, 2021 3:57 PM

Recent research showing the benefits of sulfur application to corn in Iowa have many folks asking questions about ammonium thiosulfate or ATS. ATS and ammonium sulfate (AMS) contain both nitrogen and sulfur, however in different amounts. AMS also differs from ATS in that all the sulfur in AMS is...

Soil Fertility

Rebecca Vittetoe
April 15, 2021 9:24 AM

While it seems like most alfalfa fields are greening up quite nicely this spring, there have been a few reports of winter injury in alfalfa stands, especially if stands or parts of stands may have been covered by sheets of ice during the winter.

Take some time now to evaluate stands for...

Crop Production

Ashley Dean
April 14, 2021 4:32 PM

Even though the weather has been variable this past week, one thing is certain: black cutworm is moving through Iowa. During week 2 of the Iowa Moth Trapping Network (April 4 to April 10), our cooperators reported 122 total black cutworm (BCW) and 21 true armyworm (TAW) moths. Windy conditions...

Crop Production, Insects and Mites

Paul Kassel
April 13, 2021 11:43 AM

Does the recent increase in nitrogen (N) cost and the increase in corn grain price warrant a change in nitrogen rates in 2021?  The following discussion gives an overview of the current N cost and corn price situation

New crop corn for delivery during the fall of 2021 was $4.05 per bushel...

Crop Production

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