Blog

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.  

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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

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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

Kristine Schaefer
July 15, 2019 10:30 AM

A new Iowa Private Pesticide Applicator Manual (CS 1) is available for individuals planning to take the private pesticide applicator exam to become certified or renew their certification as a private pesticide applicator in Iowa....

Pesticide Education

Elizabeth Danielson
July 15, 2019 7:41 AM

The Disposal module within the Pesticide Environmental Stewardship website was recently revised and expanded. The new version, available at https://pesticidestewardship.org/disposal/, has additional content on disposal options for excess...

Pesticide Education

Erin Hodgson
July 12, 2019 4:06 PM

My lab has been collecting adult and larval soybean gall midge for a few weeks. We used emergence cages in several habitats to collect adults. This year, they were only collected from 2018 soybean fields in Iowa. Two of my trapping locations have identified second-generation adult captures this...

Crop Production, Insects and Mites

Erin Hodgson
July 12, 2019 7:57 AM

Ashley Dean
July 12, 2019 7:57 AM

After visiting several ISU Research and Demonstration Farms this week, it was evident the abundance and diversity of caterpillars in soybean is ongoing. These species represented several insect families. We easily found 8 species while looking at and sweeping early-reproductive soybean. Of...

Crop Production, Insects and Mites

Robin Pruisner
July 9, 2019 1:44 PM

Mark Licht
July 9, 2019 1:44 PM

Unfavorable planting conditions this spring commonly delayed, and in some cases, prevented crop planting. Producers looking to plant a cover crop to meet the requirements of their insurance coverage must work with their insurer on the details of the policy, and also be mindful of the legal...

Crop Production

Rebecca Vittetoe
July 9, 2019 9:33 AM

Soybean gall midge larvae, Japanese beetles, foliar diseases in corn, and weed management issues were some of the more common issues ISU Extension and Outreach field agronomists came across in fields this past week. Read on for more information about what’s happening in specific regions across...

Crop Production

Rebecca Vittetoe
July 2, 2019 9:45 PM

The past week finally brought some heat but it also brought some storms across the state leaving areas seeing wind damage and/or hail damage. In addition to some of the storm damage, thistle caterpillars, Japanese beetles, and weed management issues seemed to be some of the main concerns across...

Crop Production

Josh Bendorf
July 2, 2019 9:56 AM

Danielle M Clark (Wilson)
July 2, 2019 9:56 AM

Iowa and Midwest agriculture has started to change in recent years. One visible change is the interest to grow crops for biofuel and bioproducts (referred to as “energy crops”). Fossil fuel usage contributes to the growing problem with greenhouse gases. Alternative energy options from plant...

Crop Production

Rebecca Vittetoe
June 25, 2019 10:10 PM

Brian Lang
June 25, 2019 10:10 PM

Meaghan Anderson
June 25, 2019 10:10 PM

Last week the USDA’s Risk Management Agency (RMA) changed the rules for when farmers who planted cover crops on prevented plant acres will be permitted to hay, graze, or chop those fields....

Crop Production

Rebecca Vittetoe
June 25, 2019 9:50 AM

The wet weather, weed management challenges in corn and soybeans, and thistle caterpillars in soybeans continue to be common issues that Iowa State University Extension and Outreach field agronomists are hearing about and seeing in fields across the state. Read on for more information about what...

Crop Production

Alison Robertson
June 23, 2019 5:44 AM

In 2018, tar spot was detected in 12 counties in eastern Iowa. The disease was observed late in the growing season, at did not cause a lot of damage. In Wisconsin, Illinois, Michigan and Indiana, however,...

Plant Diseases

Bob Hartzler
June 21, 2019 12:06 PM

Wild parsnip is a biennial that was introduced to North America by the earliest European colonists, it is documented to have been grown in Virginia as early as 1609 as a food crop. In his 1913 book The Weed Flora of Iowa, L. H. Pammel described wild parsnip as ‘common on roadsides in...

Weeds

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