Blog

Sotirios Archontoulis
August 22, 2019 3:02 PM

Mark Licht
August 22, 2019 3:02 PM

Update on crop and soil status across the I-states – August 21, 2019

This year the FACTS project is providing a suite of regional scale maps to assist decision making. The data provided is based on APSIM model simulations which are driven...

Crop Production

Paul Kassel
August 21, 2019 5:00 PM

aerial seeding of cover crops into standing corn

Farmers and agribusiness are invited to the Allee Demonstration Farm for a field day on Tuesday August 27.  Coffee and...

Crop Production

Sotirios Archontoulis
August 21, 2019 9:02 AM

Mark Licht
August 21, 2019 9:02 AM

According to the latest NASS report, the 2019 corn crop is about 2-weeks behind normal in terms of reaching dent stage. What are the implications of this delay in grain filling period and end of season yield? We address this question by examining two key weather variables; solar radiation and...

Crop Production

Justin Glisan
August 16, 2019 8:22 AM

We've gone from being too wet to the other extreme of being dry in parts of the state. Below is a summary of the most recent US Drought Monitor (USDM) map for the state of Iowa and a brief explanation of what data goes into making the USDM.

Current Conditions in Iowa. ...

Crop Production

Rebecca Vittetoe
August 15, 2019 2:44 PM

Now is the time to be doing late summer seeding of forages. This ICM article Steve Barnhart, retired Extension forage specialist, wrote does a nice job providing basic information to successfully...

Crop Production

Rebecca Vittetoe
August 13, 2019 2:12 PM

Limited rain fell across the state this past week, and approximately 36% of the state is considered to be abnormally dry according to the U.S. Drought Monitor as of last Tuesday, August 6. In addition to the dry...

Crop Production

Bob Hartzler
August 13, 2019 9:48 AM

The current approach to weed management in Iowa is at risk due to rapid expansion of herbicide-resistant weeds. In order to preserve the efficacy of herbicides two things must happen: 1) adoption of integrated weed management, and 2) shift the goal of weed management from protecting crop yields...

Herbicide Resistance

Bob Hartzler
August 12, 2019 2:28 PM

Meaghan Anderson
August 12, 2019 2:28 PM

The 2019 Iowa State University Extension and Outreach Iowa State Fair Weed Identification Contest was held on August 9 outside the John Deere Agriculture Building.  Contestants need to identify live samples of weeds of agricultural, horticultural, and natural habitats in Iowa.  Youth are tasked...

Weeds

Justin Glisan
August 11, 2019 11:12 PM

When will the first hard freeze or killing frost (equal to or less than 28°F) date be this fall? This is a question a lot of folks are wondering about right now. Over the last few decades the trend for the first frost and freeze dates in the fall has been that they are occurring later in the...

Crop Production

Alison Robertson
August 9, 2019 3:57 PM

Edward Zaworski
August 9, 2019 3:57 PM

This past week there have been numerous new reports of tar spot within the Midwest, including Iowa (Figure 1). For updates maps, please visit https://corn.ipmpipe.org/tarspot/

...

Plant Diseases

Rebecca Vittetoe
August 6, 2019 12:18 PM

The growing season started off too wet, but now we are going to the other extreme of being too dry in places. According to the U.S. Drought Monitor, just shy of 25% of the state was considered abnormally dry as...

Crop Production

Erin Hodgson
August 2, 2019 2:08 PM

Ashley Dean
August 2, 2019 2:08 PM

Today in our corn efficacy evaluation trial, Ashley and our undergraduate team found small corn earworm caterpillars infesting ears (Figures 1 and 2). Caterpillars have a light-colored head but vary considerably in color from light green, tan, pink, maroon, and nearly black. However, they almost...

Crop Production, Insects and Mites

Rebecca Vittetoe
July 30, 2019 9:24 PM

Growth regulator damage in soybeans, potato leaf hoppers, gray leaf spot, and thistle caterpillars have been some of the issues or pests ISU Extension and Outreach field agronomists have seen in fields this past week. Read on to see what is happening in specific areas across the state.  

...
Crop Production

Erin Hodgson
July 26, 2019 1:00 PM

I was recently asked if adult corn rootworms are done emerging for 2019. Of course, I respond by saying – it depends! A publication by Nowatzki et al. (2002), developed an emergence model for northern and western corn rootworm in...

Crop Production, Insects and Mites

Erin Hodgson
July 23, 2019 6:53 PM

Today for the first time this summer, I started to notice a few thistle caterpillars that didn’t look quite right. Some were very dark, some look deflated and some were kind of “slimy” in appearance. This happens to insects occasionally as a result of infection of an entomopathogen. That’s just...

Crop Production

Mark Licht
July 23, 2019 3:34 PM

As July comes to a close, it is time to make plans to seed fall cover crops. Cover crop species, seeding method, seeding rate, and timing will all depend on the goals for that cover crop. In broad terms there are three methods: 1) overseeding, 2) drill seeding, and 3) broadcast seeding with...

Crop Production

Rebecca Vittetoe
July 23, 2019 9:37 AM

This past week brought some much needed rainfall to areas across the state, which helped the crops through the hot temperatures. The pest of the week across the state seems to be thistle caterpillars causing defoliation in soybeans...

Crop Production

Alison Robertson
July 22, 2019 9:05 AM

Daren Mueller
July 22, 2019 9:05 AM

Corn is starting to tassel and beans are flowering so no wonder everyone is asking about fungicides.  We’ve tried to address some of the questions regarding whether to spray or not in this...

Pesticide Education, Plant Diseases

Rebecca Vittetoe
July 17, 2019 3:01 PM

Check out what ISU Extension and Outreach field agronomists have been seeing and hearing about in fields across the state this past week. Some of the common issues observed in fields include insect defoliation in soybeans by pests like thistle caterpillars and Japanese beetles, weed management...

Crop Production

Ethan Stoetzer
July 17, 2019 2:15 PM

A new article recently released through the Crop Protection Network (CPN) discusses how to make fungicide decisions in corn and soybean, given the delayed planting scenarios across...

Plant Diseases

Bob Hartzler
July 17, 2019 7:49 AM

Question: If the state and county are so concerned about wild parsnip, why aren’t they out spraying it? The ditches and county roads are full of it.1

...

Weeds

Bob Hartzler
July 17, 2019 6:29 AM

Meaghan Anderson
July 17, 2019 6:29 AM


Contestants at the 2018 State Fair Weed Identification Contest

The annual ISU Extension &...

Weeds

Elizabeth Danielson
July 16, 2019 7:16 AM

picture of apron, gloves, protective eyewearWhen selecting a pesticide, make sure you read the label to ensure that you have the Personal Protective...

Pesticide Education

Mark Licht
July 15, 2019 4:25 PM

Justin Glisan
July 15, 2019 4:25 PM

The weather forecast for this next week is calling for daytime high temperatures in the 90s and even in the 100s across the state and low nighttime temperatures in the 70s to 80s with little chances of rainfall. This is raising concerns on what impact this can have on the crop, especially with...

Crop Production

Kristine Schaefer
July 15, 2019 12:38 PM

As the pesticide application season progresses remember to check the FieldWatch® online registry before making pesticide applications. To be in compliance with the Iowa Bee Rule commercial applicators will need to check the registry for any registered bee...

Pesticide Education

Pages