Meaghan Anderson

Meaghan Anderson is a field agronomist in central Iowa and an extension field specialist at Iowa State University Extension and Outreach. Educational programming is available for farmers, agribusinesses, pesticide applicators, certified crop advisors, and other individuals interested in crop production.

Areas of expertise include weed management, weed biology, cover crops, corn and soybean management, and integrated pest management.

Subscribe to the Central Iowa Crop Update for current topics and agriculture events in the area.

Meaghan Anderson
January 17, 2023 8:00 AM

Over the past few decades, producers have begun to continually face herbicide resistant weed pressure throughout their cropping systems. Continuous use of the same herbicide program can quickly develop resistant weed biotypes, especially if there are no other weed management tactics being used...

January 12, 2023 8:34 AM

Logo with CropsTV

The Iowa State University Extension and Outreach Crops Team is excited to have launched the 3rd...

Crop Production
October 19, 2022 4:31 PM

The time for fall application of anhydrous ammonia and manure is approaching, but we may not be there yet. This blog has a few things to keep in mind this fall and links to some good references.

While soybean harvest seems to be winding down, we need to be carefully monitoring the soil...

Crop Production, Soil Fertility
September 9, 2022 8:19 AM

Again this August, I joined my colleague Patrick Hatting, Farm Management Specialist for central Iowa, and checked several Polk County corn fields to make yield estimates. After R3 (milk stage) is a great time to venture...

Crop Production
July 27, 2022 9:06 AM

While crop development is behind this year due to the late planting, warm weather in the forecast will result in faster development than we prefer during reproductive growth stages of our crops. Appropriate identification of reproductive growth stages can be important for numerous reasons like...

Crop Production
July 19, 2022 5:13 PM

With hot weather and few rain chances in the forecast, concern turns toward soil moisture reserves and the ever-important pollination timing in corn. ISU Extension field agronomists observed corn rootworm beetles, Japanese beetle feeding,...

Crop Production
July 7, 2022 4:25 PM

30 a.m.

The annual ISU Extension & Outreach Iowa State Fair Weed Identification Contest will be held on...

June 10, 2022 12:10 AM

The month of June has come roaring in with severe weather affecting crops in many different areas. This blog with briefly discuss some management considerations and resources associated with different types of early-season crop injury.


Some areas received...

Crop Production
June 7, 2022 9:26 AM

Postemergence herbicide application season is already upon us in much of Iowa, but with the delayed crop planting in some areas, it may extend through much of the month of June. Herbicide application timing should always focus on the sizes of weeds targeted but remember that many products use...

Crop Production, Weeds, Herbicide Resistance
May 6, 2022 2:18 PM

This spring's weather has resulted in an unusually slow start to the growing season, especially when compared with the past two years. In springs like these, field operations are condensed and there may be temptation to skip some of the field preparation to get acres planted in a timely manner....

Weeds, Herbicide Resistance
April 8, 2022 10:35 PM

With a warm-up in the forecast, spring fieldwork like cover crop termination will begin when fields are fit. While some farmers may opt to use mechanical methods of cover crop termination like tillage or roller-crimping, chemical termination is the most common and often most effective way to...

Crop Production, Weeds
April 4, 2022 2:27 PM

Determining the appropriate glyphosate rate is probably more important this spring than in previous years. Between high herbicide prices, reduced supply, and possibly using a different glyphosate product, it is worth checking to make sure you’re applying the optimum rate for efficient control....

Pesticide Education, Weeds
October 5, 2021 8:19 AM

I have yet another weird insect situation to add to what feels like an already comprehensive list of issues for 2021. Last week, a farmer in central Iowa brought a grain sample into an ISU county extension office that was full of small, black beetles. These beetles had survived through the...

Grain Handling and Storage, Insects and Mites
September 6, 2021 9:12 PM

Anytime after R3 (milk stage) has traditionally been a great time to do yield checks in corn. After R3, kernel abortion is less likely and plant stress will result in reduced kernel size or fill rather than kernel loss. In addition to performing a yield check, walking late reproductive corn...

Crop Production
August 31, 2021 10:27 PM

Mark your calendars for our upcoming fall field days. Below is a list of the upcoming field days that will take place in early September and topics featured at each field day. All field days are free and open to the public. We hope you can join us!

Sept. 7, 2021 – Annual Forage...

Crop Production
July 11, 2021 10:33 AM

A common sight across the state this summer has been yellow or white patches of soybean in otherwise green fields. This ICM Blog will review several possible causes of yellow soybean and provide resources regarding each phenomenon.


Iron Deficiency Chlorosis (IDC)...

Crop Production, Soils, Soil Fertility
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 10:06 AM

Like in prior springs, we often see a trend in the weed identification questions in certain parts of the state. This spring, a small mustard species with finely-divided (I like to say frilly or lacy) leaves is the most frequent plant requiring identification by our clients. There are several...

April 27, 2021 8:29 AM

While the warm weather has finally arrived for planting season, dry soil is becoming an increasing concern in parts of the state. In addition to concerns about subsoil moisture, some fields have had significant surface drying, particularly in areas with more tillage this spring. Dry soil...

Crop Production
April 19, 2021 10:12 AM

It’s hard not to be itching to get in the field and start planting, especially since we are past the April 11th crop insurance date for planting. However, the optimum planting date is dictated by soil conditions (moisture and temperature), the weather forecast, and the calendar date...

Crop Production
April 7, 2021 6:26 AM

As the weather turns warmer and the days grow longer, many of us are thinking about getting equipment like sprayers ready for the spring. Beyond making sure the machine is mechanically sound and fit for spring (which...

Equipment and Machinery
April 6, 2021 11:06 AM

As it has started to warm up, folks are ready to implement early-spring weed management programs, especially in fields with infestations of winter annuals like field pennycress and marestail (horseweed). Spring burndown (preplant) herbicide programs should target winter annual plants at the...

March 26, 2021 12:55 PM

Volunteer corn remains high on many minds this spring and one of the biggest questions is how much of those corn seed will germinate this spring. In an effort to learn more about the challenge we’re facing, Bob Hartzler collected soil and corn ears from the same fields he collected from last...

Crop Production, Weeds
March 5, 2021 8:06 AM

Due to extensive damage to corn fields last year from the derecho, volunteer corn is a looming threat for many fields this spring. Farmers intending to plant corn in these derecho-affected fields have limited options for managing volunteer corn, thus thoughtful planning is critical. I asked a...

Crop Production, Weeds
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