Blog

Clarke McGrath
October 16, 2015 11:02 AM

By: Clarke McGrath

It’s NH3 season, so here are some safety reminders from a guy who has seen how badly NH3 can injure people, first-hand. We work around it so much that sometimes we forget how caustic and dangerous it is.

Crop Production

Mahdi Al-Kaisi
October 14, 2015 4:26 PM

By: Mahdi M Al-Kaisi

The Inaugural Soil Health Conference “Strategies for Building Healthy Soils” will be February 2-3, 2016 at the Scheman Building in Ames, Iowa. The goal of this conference is to increase awareness and understanding of soil health as a pivotal measure to...

Soil Management

Rebecca Vittetoe
October 14, 2015 10:05 AM

By: Rebecca Ahlers

As a field agronomist, you see all sorts of interesting things in fields and never know what you may come across. I've seen and heard of slug injury early on in soybeans, but snails?

...

Crop Production, Insects and Mites

Clarke McGrath
October 9, 2015 4:44 PM

By: Clarke McGrath

In running plots and talking with growers the last week or so, the shift to more “fall-like” temperatures has people thinking, “Maybe I can run some fall NH3 while (if) I am held up waiting on trucks, grain drying, or other typical fall delays.”

Having been...

Soils, Soil Fertility, Soil Management

Clarke McGrath
October 7, 2015 4:24 PM

By: Clarke McGrath

Stalk rot issues have only gotten worse in recent weeks; in some cases, a lot worse. Stalk rot and resultant standability challenges have reportedly been issues across much of the state, and are not hard to find in most of southwest and west central Iowa.

...

Crop Production, Plant Diseases

Daren Mueller
October 7, 2015 11:57 AM

Xavier Phillips
October 7, 2015 11:57 AM

Chelsea Harbach
October 7, 2015 11:57 AM

By: Daren Mueller and graduate students, Xavier Phillips and Chelsea Harbach

Green and purple soybean stems

Some are noticing plants with green, yellow or purple...

Crop Production, Plant Diseases

Paul Kassel
October 2, 2015 11:20 AM

A couple of farm visits took me from Emmetsburg to Cylinder to Ringsted on October 1. I am guessing the soybean harvest in those areas is about half done. 

The big news this year is that we are seeing some exceptional soybean yields. There are lots of credible reports of 60 bu/a whole...

Crop Production

Erin Hodgson
September 29, 2015 9:04 AM

Laura Jesse Iles
September 29, 2015 9:04 AM

Donald Lewis
September 29, 2015 9:04 AM

Pine seed bug

As harvest begins and other plants in the landscape senesce, many insects and arthropods move to find overwintering habitat. Sometimes...

Insects and Mites, Pesticide Education

Paul Kassel
September 11, 2015 3:03 PM

Crop development progress is looking good in northwest Iowa. We are seeing corn that is in the 1/2 milk line stage as well as a few fields that have reached black...

Crop Production

Bob Hartzler
September 11, 2015 12:14 PM

All across Iowa, the edges of woods are lined with plants bearing clusters of white flowers.  There's a good likelihood those plants are white snakeroot, a native perennial in the Asteraceae family.   The plant is best known for its role in milk sickness, an ailment responsible for the death of...

Weeds

Mark Licht
September 8, 2015 8:54 AM

A new UNL Yield Forecast came out last Friday. The high probability of near- or above-average yields continues at all Iowa locations. The Sutherland and Kanawha locations still have considerable probability of below normal yields. The Lewis location has greater than a 99% probability of...

Crop Production

Bob Hartzler
September 7, 2015 12:36 PM

Short Version:  493 miles in 12 hours; 2 out of 3 known Palmer amaranth sites well managed; no new infestations found.

Long Version:  I went to the three Palmer amaranth infestations in western Iowa that I am aware of.  This is the third year I’ve visited...

Weeds

Bob Hartzler
September 1, 2015 7:29 AM

An extension client asked why waterhemp that survive a postemergence herbicide often develop into a bushy plant with an abnormally thick stem.  The short answer would be the plant was too big when it was sprayed, but I trust this person wanted a more in-depth response.

...

Weeds

Bob Hartzler
August 25, 2015 7:50 PM

One of the first memories of my extension career is a farmer from northwest Iowa explaining his approach to managing the weed seedbank. He stated that he carried a box of atrazine 90DF in his combine. Whenever he encountered a velvetleaf or cocklebur he would stop, pull the offending weed, place...

Weeds

Erin Hodgson
August 25, 2015 9:19 AM

The last few weeks have been full of soybean aphid discussions. Populations have been going up, down and otherwise looked sort of bumpy this summer. Many fields exceeded the economic threshold of 250 per plant and were treated with foliar insecticides in August, particularly in northern Iowa. My...

Crop Production, Insects and Mites

Bob Hartzler
August 24, 2015 1:05 PM

Burcucumber and wild cucumber (AKA wild balsam apple) are weedy members of the cucumber family.  They are frequently found along river bottoms and other wet areas, and may cause serious problems due to their ability to climb and smother small to medium sized trees.  Burcucumber is more likely to...

Weeds

Paul Kassel
August 19, 2015 4:23 PM

We have experienced quite a turnaround in weather the last four days.  Last Sunday August 16 – we were experiencing dry soil, high temperatures and crop stress.  After a late Sunday afternoon rain shower of around 0.5 inch – things were looking good. 

However, the rain persevered and now...

Crop Production

Mark Licht
August 14, 2015 4:32 PM

The new Yield Forecast came out from the UNL project on today. There is a high probability of near- or above-average yields at all six Iowa locations with 95% probability being near- or above average at all locations except northwest and north central Iowa. The range of yield potentials forecast...

Crop Production

Adam J. Varenhorst
August 14, 2015 9:42 AM

Mike Dunbar
August 14, 2015 9:42 AM

Aaron J Gassmann
August 14, 2015 9:42 AM

Erin Hodgson
August 14, 2015 9:42 AM

Corn rootworm adult emergence is underway in Iowa. The three species of rootworm found in Iowa include the northern corn rootworm (NCR), southern corn rootworm (SCR), and western corn rootworm (WCR). Adults of all three species can be found until the first frost. Knowing how to distinguish the...

Crop Production, Insects and Mites

Bob Hartzler
August 13, 2015 7:23 AM

Wild parsnip is an invasive plant commonly found in roadsides, pastures, restored prairies and other areas with full sun and minimal disturbance.  It is a biennial that forms a rosette with 'celery-like leaves' (Fig. 1.) and an umbel with yellow flowers (Fig. 2).  It contains a class of...

Weeds

Bob Hartzler
August 10, 2015 8:21 AM

Meaghan Anderson
August 10, 2015 8:21 AM

The annual ISU-Iowa State Fair Weed Identification Contest is this Friday, August 14, from 9:00 - 11:00 AM in front of the John Deere Agriculture Building.  With three divisions (Future Agronomists, General, and Professional) it is indeed fun for the entire family.  See how your weed...

Weeds

Bob Hartzler
August 10, 2015 7:37 AM

Figure 1.  A poison ivy trifoliate leaf.

 

In the past few weeks I've had at least five inquiries regarding a possible poison ivy pandemic.   Poison ivy is a...

Weeds

Rebecca Vittetoe
August 6, 2015 3:49 PM

Are you seeing yellow-ish spots showing up in your soybean fields, especially in compacted parts of the field? This could be the start of Sudden Death Syndrome (SDS). With how wet its been there year, we've had the ideal conditions for disease development. 

...

Plant Diseases

Erin Hodgson
August 5, 2015 2:00 PM

This week, I've had several calls and emails about aphids feeding on corn. They aren't a persistent pest, but can occasionally be found in Iowa corn. I wrote up a short ICM News article in 2011. Although an economic...

Crop Production, Insects and Mites

Mark Licht
August 3, 2015 12:39 PM

It’s time for another Yield Forecast. A new Yield Forecast came out from the UNL project on July 29. For Iowa, this new forecast is similar to the July 15th forecast with the exception of northwest Iowa. Rains in northwest Iowa have increased yield potentials to 94% likelihood of being near or...

Crop Production

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