Erin Hodgson

Dr. Erin Hodgson started working in the Department of Entomology at Iowa State University in 2009. She is a professor with extension and research responsibilities in corn and soybeans. She has a general background in integrated pest management (IPM) for field crops. Dr. Hodgson's current extension and research programs are focused on improving corn and soybean production by using IPM tactics to protect yield and increase overall farmer profits. Among other projects, she oversees insecticide efficacy evaluations for soybean aphids, Japanese beetles, and aphids in corn. Erin also helps manage emerging field crop pests and invasive species. 

Photo of Erin Hodgson
May 2, 2022 1:07 PM

For many years, we have provided scouting alerts for key insect pests on ICM News and ICM Blog, including...

Crop Production, Insects and Mites
May 2, 2022 11:46 AM

Today during our Crops Team meeting, many field agronomists shared that cool soil temperatures and rain have delayed planting in Iowa, but there are some very determined farmers getting acres planted around the state. These cool and wet conditions during spring are favorable for a few seed and...

Crop Production, Insects and Mites
February 11, 2022 9:28 AM

Iowa State University’s IPM Team has monitored field crop pests for a long time. The pests have changed over the years, but the goal is the same: to help inform farmers about pest activity in Iowa. Our moth trapping efforts target migratory moths. Black cutworm monitoring is a long-standing...

Crop Production, Insects and Mites
January 27, 2022 9:47 AM

In 2021, we initiated the first year of the regional corn rootworm monitoring network with the Corn Rootworm IPM working group. This working group was formed to address regional concerns as corn rootworm populations continue to overcome Bt corn hybrids and become more challenging to manage. The...

Crop Production, Insects and Mites
January 26, 2022 6:54 PM

Since its discovery as a new species in 2019, soybean gall midge continues to be found in new counties across five states in the Midwest. For some farmers, the presence of soybean gall midge had a significant impact on soybean yield. The persistence of this new pest in existing areas and its...

Crop Production, Insects and Mites
October 28, 2021 12:41 PM

Following up on Meaghan’s blog post on October 5 about sap beetles in corn grain, I received a few more questions about infested bins. There are MANY insects that cause losses in stored grain and food...

Crop Production, Grain Handling and Storage, Insects and Mites
September 16, 2021 7:52 AM

I got invited to SERF (ISU Southeastern Research Farm) field day last week to highlight corn rootworm management. I was easily distracted when it wasn't my stop and started walking around soybean plots looking for insects. [this is a common occurrence with entomologists!] Soybean was in...

Crop Production, Insects and Mites
August 19, 2021 7:56 AM

My lab has been driving all over western Iowa looking for soybean gall midge. They stop by 3-6 fields in each county and scout for larvae along field edges. This is part of a larger effort funded by the North Central Soybean Research Program to better understand the current distribution of this...

Crop Production, Insects and Mites
July 21, 2021 7:09 AM

Last week, a team of us met up at the Iowa State University Southeast Research Farm (SERF) to evaluate root injury in a small trial for corn rootworm management. The trial had four treatments replicated eight times. The treatments included no management (glyphosate-tolerant only; no Bt traits or...

Crop Production, Insects and Mites
July 14, 2021 2:49 PM

Soybean gall midge detections continue in western Iowa. As of this week, there are ten counties with infested soybean fields. These counties were previously infested with larvae. In some fields where we monitor activity a bit closer, we noticed first-generation adults were produced. These adults...

Crop Production, Insects and Mites
June 29, 2021 7:25 AM

I’ve had a lot of questions about soybean gall midge over the winter and in the last few weeks. Most fields have plants with 4-7 trifoliates and I’ve even seen some flowers! If you are connected with the Soybean Gall Midge Alert Network, you know...

Crop Production, Insects and Mites
June 18, 2021 4:42 PM

Today, our lab crew went to the Johnson Farm south of Ames, Iowa to evaluate a bean leaf beetle study. To our surprise, we found many V4-V6 plants with established soybean aphid colonies (Photo 1). It is not uncommon to find sporadic soybean aphids in June, but it is surprising to find a colony...

Crop Production, Insects and Mites
June 14, 2021 2:25 PM

Over the last 5 days, I’ve been asked numerous times about a small butterfly roaming the gravel roads and wooded areas around Iowa. It’s a fast, skittish insect and tracking down a good photo has been really tough. They are described by entomologists as mercurial, or subject to sudden and...

Insects and Mites
June 10, 2021 1:56 PM

For the second year in a row, we’ve been hearing multiple reports of fields with high grub activity in central Iowa, particularly between Ames and Ankeny. Typically, people were called out to the field for other reasons but found grubs once they started digging. In fact, a field I visited last...

Crop Production, Insects and Mites
June 10, 2021 1:36 PM

Most people are already finished with their first cutting of alfalfa throughout Iowa, but each of our 10 field agronomists reports that alfalfa weevil activity continues and has been much...

Crop Production, Insects and Mites
May 20, 2021 1:49 PM

Western and northern corn rootworms are serious corn pests in Iowa and the Corn Belt, primarily due to their feeding habits but also because they can overcome nearly all management tactics available to farmers. The larvae tunnel into and consume corn roots, thereby reducing nutrient and water...

Crop Production, Insects and Mites
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
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
February 16, 2021 1:35 PM

One of the most common questions coming out of any winter is “how did the insects do?” In winters like this, where we have extended cold spells, farmers and agronomists alike want to know whether the cold was enough to kill some of our most common crop pests. Entomologists Erin Hodgson and...

Insects and Mites
February 15, 2021 11:00 AM

Iowa State University’s IPM Team has monitored field crop pests for a long time. The pests have changed over the years, but the goal is the same: to help inform farmers about pest activity in Iowa. Our moth trapping efforts target migratory moths. Black cutworm monitoring is a long-standing...

Crop Production, Insects and Mites
January 7, 2021 4:26 PM

Soybean gall midge is an emerging pest that only occurs in five Midwest states. Researchers in Nebraska, Iowa, Minnesota, and South Dakota began investigating this pest in 2019 after widespread reports of significant injury raised awareness early in the 2018 growing season. Although a lot of...

Crop Production, Insects and Mites
November 6, 2020 3:14 PM

We are looking to hire a new Extension Field Agronomist to serve south central Iowa (Clarke, Lucas, Monroe, Wapello, Jefferson, Decatur, Wayne, Appanoose, Davis, and Van Buren counties). Field agronomists provide educational leadership and subject-matter expertise in crop production and...

Crop Production
August 21, 2020 9:44 AM

The range of soybean gall midge has expanded in 2020. There are three new counties in Iowa (Osceola, Dickinson, and Calhoun) for a total of 29. So far, 108 total counties are confirmed in Iowa, Minnesota, Missouri, Nebraska, and South Dakota. Likely more counties have soybean gall midge but...

Crop Production, Insects and Mites
August 14, 2020 7:07 AM

Caterpillars have been extremely active this year, especially in soybean. We suspect that late-season infestations of caterpillars in corn are no exception. These infestations are serious because these caterpillars feed on the ear and/or tunnel into stalks. Their feeding can also lead to...

Crop Production, Insects and Mites
July 18, 2020 11:30 AM

With several severe weather events in Iowa this month, reports of lodged corn are coming our way. Often times, a small part of the field is flattened and would be difficult to see from the edge. I encourage you to get out into cornfields and see how your stands look this month. In some cases,...

Crop Production, Insects and Mites

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