Blog

Bob Hartzler
June 21, 2017 12:33 PM

The six weedy Amaranthus species at the weed garden have grown quite a bit, but I'm not sure how much easier it is to differentiate a few of the species. The six pigweeds are Palmer, Powell's and spiny amaranth, waterhemp, and redroot and tumble pigweed (not in that order!!). The...

Weeds

Erin Hodgson
June 21, 2017 9:47 AM

Today while scouting a commercial field north of Ames, I was looking for soybean aphid. I didn't see one aphid (sniff, sniff), but I did see a handful of thistle caterpillars. The caterpillars web together soybean leaves and feed inside the temporary home. They also produce copious amounts of...

Crop Production, Insects and Mites

Rebecca Vittetoe
June 20, 2017 4:46 PM

Some much needed rain fell across parts of the state last week, but with the rain came some strong winds and hail in parts of the state. Other areas could still use some rain. Iowa State...

Crop Production

Paul Kassel
June 20, 2017 10:42 AM

Consider attending one of the Nitrogen and Water Week field days next week – June 27 to 29.

Our focus of these meetings is to have attendees ‘kick the tires’ on the tile drainage studies conducted by Iowa State University. 

Nitrate in tile drainage water is on the mind of many...

Crop Production

Mark Licht
June 19, 2017 8:11 AM

Unfortunately, hail damage is not a rare occurrence in Iowa. Every year hail damage occurs; it is just a matter of how severe it is and how widespread it is. In most cases, hail damage results in varied levels of defoliation. Defoliation will have an impact on crop yield potential at a greater...

Crop Production

Jody Korthaus
June 15, 2017 2:07 PM

The Field Extension Education Lab has five clinics/workshops this summer in July and August. Below is a list of programming updates that correlate with current farmer concerns and this year’s crop issues:

  • New to the lineup this...
Crop Production, Insects and Mites, Plant Diseases, Soils, Weeds, Herbicide Resistance

Rebecca Vittetoe
June 13, 2017 10:33 PM

The USDA Weekly Crop Progress Report showed that Iowa's corn crop is 96% emerged and gave Iowa’s corn crops a 77% good to excellent rating. Soybean...

Crop Production

Bob Hartzler
June 13, 2017 7:55 AM

This year at the ISU FEEL weed garden I've established a plot with nine weedy members of the Amaranthaceae family, including six pigweeds .  The pigweeds were transplanted on June 9 and pictures taken on June 11. Species include redroot pigweed, tumble pigweed, Palmer amaranth, spiny amaranth,...

Weeds

Bob Hartzler
June 8, 2017 2:19 PM

While searching for Palmer amaranth in a pollinator habitat planting I encountered a few musk thistles.  As I always do when I see this weed, I examined flower heads for the presence of the musk thistle weevil.  This insect was imported to North America as a biocontrol agent for musk thistle.  ...

Weeds

Rebecca Vittetoe
June 7, 2017 7:24 AM

The USDA Weekly Crop Progress Report showed that Iowa's corn crop is 90% emerged and gave Iowa’s corn crops a 77% good/excellent rating. Soybean planting...

Crop Production

Erin Hodgson
June 2, 2017 7:57 AM

This week, we finally got most of our plots in the ground. We've been patiently waiting for soil conditions to improve. This year, I have research in four locations around Iowa: NW Research Farm (Sutherland), Northern Research Farm (Kanawha), NE Research Farm (Nashua), and Johnson/Bruner...

Crop Production, Insects and Mites

Rebecca Vittetoe
May 31, 2017 8:50 AM

Armyworm feeding has been observed in several fields in northeast and southeast Iowa. Most of the fields with the feeding had cereal rye planted last fall and were terminated this spring.

Now is the time to be scouting for armyworms. Look for feeding on leaves. The larvae will typically...

Insects and Mites

Micheal D.K. Owen
May 30, 2017 2:35 PM

The 2017 North Central Weed Science Society (NCWSS) Collegiate Weed Contest will be hosted by Iowa State University at the Field Extension Education Laboratory (FEEL) near Boone, IA on July 26-27, 2017. Undergraduate and graduate students from universities throughout the Midwestern United States...

Weeds

Erin Hodgson
May 30, 2017 9:25 AM

Last summer, I wrote a blog about how the spring started off warm compared to most summers. I was curious to know about accumulated temperatures for 2017. According to the...

Crop Production, Insects and Mites

Mark Licht
May 25, 2017 1:05 PM

It is that time of year and with the weather conditions we’ve had the last 30 day we should expect to see purple corn, yellow corn, and maybe even some tattered leaves. Mostly the mosaic of corn color is a product of the weather; cooler and wetter. Over the last 30 days, rainfall has been 150 to...

Crop Production

Kelsey Fisher
May 23, 2017 1:07 PM

Erin Hodgson
May 23, 2017 1:07 PM

Monarch butterflies are an iconic species, known for their vibrant orange color and magnificent migration. Monarchs overwinter as adults in Central Mexico and fly to Texas and Oklahoma in the spring. Females lay eggs on milkweed plants, and the caterpillars feed on milkweed for about two weeks....

Insects and Mites

Rebecca Vittetoe
May 23, 2017 12:58 PM

Currently 92% of Iowa’s corn crop has been planted and 62% of the soybean crop according to Monday’s USDA Crop Progress Report. However, the wet weather...

Crop Production

Adam Sisson
May 23, 2017 12:49 PM

Erin Hodgson
May 23, 2017 12:49 PM

In 2017, ISU is reporting black cutworm (BCW) peak flights by county and providing degree day resources for more personalized cutting prediction dates using actual accrued degree days for a specific location. We first reported on BCW peak flights in the...

Insects and Mites

Donald Lewis
May 22, 2017 2:49 PM

Laura Jesse Iles
May 22, 2017 2:49 PM

Recent requests for information has prompted us to share what we know about "jumping worms," another in a long list of invasive species that could have a negative impact on our landscapes and natural areas. In the words of Gilda Radner, "It's always something. If it isn't one thing – it's...

Insects and Mites

Alison Robertson
May 15, 2017 7:24 AM

Rebecca Vittetoe
May 15, 2017 7:24 AM

Cooler and wetter conditions can effect corn germination and emergence, but they can also provide a favorable environment for seedling diseases.

One research study being conducted by ISU is taking a closer look at seedling diseases in corn. The goals of the research are (i) to identify...

Plant Diseases

Bob Hartzler
May 12, 2017 3:43 PM

I decided to take advantage of the great weather and see if Palmer amaranth could be identified in CRP fields where it was introduced last year.  I went to one field in Boone County and another in Story County.  I was happy to find that both fields had good stands of forbs that will compete with...

Weeds

Erin Hodgson
May 12, 2017 3:33 PM

You might not think insects would make great parents, and in general, you would be correct. Most species just drop eggs and keep moving. But there are a few species, particularly true bugs (Hemiptera), that do try to protect their young. Parental care ranges from hiding eggs, to providing food,...

Insects and Mites

Rebecca Vittetoe
May 10, 2017 8:43 AM

#Plant17 is progressing across Iowa. Following a period of cooler and wetter weather, most farmers have been able to get back in the fields over the weekend and either resume or start planting. According to Monday’s USDA Crop Progress report, Iowa had 52% corn planted and 19% of soybeans for the...

Crop Production

Erin Hodgson
May 9, 2017 8:37 AM

grub body partsThis week, a couple Iowa crop consultants reported grubs are easy to find this spring. I assume they are digging in crop soils to evaluate seed germination. Last...

Crop Production, Insects and Mites

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