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From the Field Crop Report: June 14
Eastern North Dakota

Brain McNamee

The good news is that rain finally fell in some drought-stricken areas. Too bad last weekends weather event also delivered damaging hail as pictured in this field near Rugby, ND. This field was a total loss with less than 5% viable plants left.

Fortunately, the two showers that followed this storm delivered more rain and zero hail.

Emergence before the storm was very erratic, causing plant stand evaluations to be difficult. Because we haven’t had rain for so long, soybeans were planted into dry dirt and laid dormant for three weeks.

You know the hail damage is bad when cattail sloughs look like this!

Southeast North Dakota

Gary Geske

My grandkids helping scout a field of Latham LH 3877 VT2 PRO RIB.

Mid-season crop scouting is important for two reasons: (1) different weed, insect and disease pressures become evident this time of year; and (2) summer months are a crucial time to decide which traits to implement when buying seed for the next crop year. Click here for more crop scouting tips.

Northeast South Dakota

James Keltgen

It’s been an active week of weather in NESD. 3-6 inches of rain fell in the Clark and Watertown areas. Damaging winds and hail leveled fields northeast of Watertown. The good news is rain fell in the worst drought areas in central SD this week. There has been damaging storms this weekend in SD the last 3 years. Growers are baling winter wheat for feed near Gettysburg. Spring wheat may be too short to cut. Pastures are brown but corn and soybeans held on long enough to catch rains.

Southeast South Dakota

Ramie Coughlin

Look what’s cropping up in Southeast South Dakota… This week my family and I welcomed our fourth member. Daxton Ryan said hello to the world at 12:40 am on June 13, weighing in at 6 pounds, 15 ounces and stretching to 20 inches long. He is loving life on the outside, and we are loving life with him!

Northern Minnesota

Ken Highness

My grandson Casen and I are doing root digs on Latham’s experimental corn varieties in a SuperStrip plot near Felton, MN. This plot was planted May 7. At this stage, the root mass is well developed. The very white roots indicate an excellent healthy plant.

Southern Minnesota

Brandon Wendlandt

Storms came through much of southern Minnesota on Sunday and Monday and brought much needed rain. While some areas reported more, I received 2 inches of rain at my house. Some small hail was reported with the storm, but we haven’t seen crop damage from it here. Other areas did receive damaging hail and winds, so it will take a few days to assess the damage and decide a course of action.

Southern Wisconsin

Greg Mair

The cold, wet spring has caused stand reductions in all crops across the Corn Belt. A final stand evaluation is a key component to yield at harvest.

Using the Hula-Hoop method for soybeans, we determined this location in Deerfield, Wisc. had an average stand of 130,000 plants per acre (ppa). We threw a 36″ hula-hoop around the field and calculated the number of plants within by the corresponding factor (6,165) to get plants per acre. Click here for more tips on assessing corn and soybean stands.

Northwest Iowa

Darin Chapman

Check out the picket fence stand and great emergence from Latham’s LH 4955 VT2 PRO!

Northwest Iowa just received a couple shots of much needed rain in the last couple of days. Unfortunately, some received damaging hail with that rain.

South Central Minnesota & North Central Iowa

Cory Greiman

When spring weather is wet, some farmers get overly anxious about getting seed in the ground. We understand their sense of urgency, but we also know they’ll have better results if they wait for more suitable field conditions. Here’s a case in point see the wheel track compaction in a corn field due to working it when soils were too wet?

Top 10 Reasons to Avoid Soil Compaction:
1. Causes nutrient deficiencies
2. Reduces crop productivity
3. Restricts root development
4. Reduces soil aeration
5. Decreases soil available water
6. Reduces infiltration rate
7. Increases bulk density
8. Increases sediment and nutrient losses
9. Increases surface runoff
10. Damages soil structure
Click here for tips to avoid soil compaction.

Southeast Minnesota & Northeast Iowa

Craig Haaland

This nice looking field of LH 5010 conventional corn was planted around May 7 in Dodge Center, Minnesota. Fortunately, we’ve finally received some much needed rain. This hot, humid weather pattern is sticking. It’s going to be important to scout your fields to stay ahead of any insect and disease pressure. Scouting fields also can help you note changes needed to your 2018 crop plan.

West North Central Iowa

Bart Peterson

LH 5095VT2 PRO, planted April 11, near Rolfe in West Central Iowa has already canopied. Corn is at V6 to V7 stage.

Eastern Iowa

Jerry Broders

Time of planting and soil conditions have played a huge role in soybean emergence this planting season.

These photos were taken last week at planting time. Dry soil needs rain to help move along these plants.

Central Iowa

Bryan Rohe

High heat and no moisture is casing corn plant in Central Iowa.

Western Iowa & Eastern Nebraska

Larry Krapfl

Photo 1

LH 3158 LL planted April 18 full shade on the 15-inch rows

Photo 2

This field of LH 6317 VT2 PRO DG RIB, which was planted April 12, will be knee high before the 4th of July.

Photo 3

LH 6175 VT2 PRO RIB is nearly waist high on this Latham dealers farm in western Iowa
June 14, 2017

Corn, Crop, Season, Soybeans, Summer
Latham Hi‑Tech Seeds

Podcast: Soybean & Corn Replant

Welcome back to our Ask the Agronomist Podcast! Phil is traveling across Latham Country this week and gives us a update form the field, with an emphasis on replant.

0:45 — From the Field update

1:30 — Is replant still on the minds of famers in Latham Country?

4:30 — Weed Pressure

5:15 — Stand counts & uniformity

7:25 — When does replant date compromise yield?

9:10 — Interplanting in your fields?

Thanks again for tuning in! Find us on Facebook, Twitter or Instagram to submit your agronomy questions. See you back next week!

June 8, 2017

#AskTheAgronomist, Corn, Crop, Podcast, Soybeans
Latham Hi‑Tech Seeds

Plant into the Best Seedbed Possible

One of the things I like most about spring is you get to enjoy all four seasons in just a few days. In mid-April, we had snow flurries with an overnight low of 16 on a Sunday. A warm wind brought temperatures into the 70s by mid-week, and that weekend rain fell. That’s why I always tell people to plant by the conditions, not the date on the calendar!

Soil conditions are far more important than planting date. Rather than mudding in your seed to say that it was planted early, you’ll have a better chance of achieving maximum yield by planting into properly tilled soil. Working soils that are too wet leads to yield loss and more problems during the growing season from soil compaction. Restricted root development, nutrient deficiency and reduced infiltration rate are among the top 10 reasons to avoid soil compaction.

Adapted full-season corn hybrids can compensate somewhat for later plantings. As planting is delayed, hybrids shorten the time between planting and silking. Research shows that development and final yield of these hybrids will not be largely affected unless frost occurs especially early in the fall. That’s why we recommend waiting until May 15 in North Dakota and May 25 in Iowa before switching to an earlier maturing corn hybrid or switching to soybeans.

Patience is also key when planting soybeans. Planting into a field that is too wet will reduce emergence and plant population, which most often leads to reduced yield. Another cause of reduced yield is weed pressure. Make sure the sprayer is right behind the planters. Otherwise, soybeans might poke through the ground before your pre-emerge was applied.

We get one chance every spring to create the best seedbed possible for planting, so let’s take advantage of it! This may require a different piece of tillage equipment than originally planned, but taking the time to make the equipment switch will pay big dividends by resulting in better seed-to-soil contact that enhances germination and early growth.

June 6, 2017

Corn, Crop, Soil, Soybeans, Tech Tuesday
Latham Hi‑Tech Seeds

Podcast: Early Season Crop Scouting

Welcome back to week 5 of our Ask the Agronomist Podcast! Today, Phil explains the difference between abiotic and biotic issues in the field throughout Latham Country.

0:35 – What are abiotic & biotic stresses?

1:10 – Abiotic Issues: Herbicide Damage

3:15 – Abiotic Issues: Crusted Soil & Compaction

4:10 – Abiotic Issues: Emergence

4:45 – Abiotic Issues: Yield Loss

5:45 – Biotic Issues: Seedling Diseases & Insect Pressure

6:40 – Replant Decisions

9:00 – Corn & Soybean Growth

Remember to submit your questions to us on social media! Find us on Facebook, Twitter or Instagram. Thanks for tuning in!

June 1, 2017

#AskTheAgronomist, Corn, Crop, Podcast, Soybeans
Latham Hi‑Tech Seeds

From the Field Crop Report: May 24

Southeast North Dakota

Gary Geske

Cool, wet weather has slowed root development and some plants are showing a yellowing or purplish leaf color. Warm weather should enhance development of the roots. Normally, there is no yield reduction from plant discoloration at this time in the growing season unless it’s fertility driven by low nutrient levels.

Southeast South Dakota

Ramie Coughlin

We have cold saturated soils in Southeast South Dakota on the 23rd of May. Most corn fields are up and can be rowed on a drive by. Unfortunately, when you stop and look closely it, there is a bit of a yellow tint to it. These crops need sunshine and warm temps.

Northeast South Dakota

James Keltgen

Things have really changed in the last week. Many areas received decent levels rainfall, which halted planting. Areas in Central South Dakota are still very dry, and areas in East Central South Dakota are very wet as more than 3″ of rain fell. Cool, cloudy weather slowed growth as you can see slight yellowing in corn. Emergence looks very good and even in corn and many soybeans are starting to crack.

Northern Minnesota

Ken Highness

Gary Geske and I planted Latham’s regional corn and soybean plot on May 23. Gary is pictured here, checking seed depth. The plot is located on the southwest corner of State HWY 10 and State HWY 9 near Glyndon, Minnesota.

Southern Minnesota

Brandon Wendlandt

This field of LH 5095 VT2 was planted April 23. Rain, clouds and low temperatures this past week hasn’t promoted much growth. Once the sun returns, just watch that corn grow!

Even with our cloudy, cool spring weather we are only running 10 GDU days behind the historic mark for may according to the University of Minnesota Outreach Center in Lamberton.

Southern Wisconsin

Greg Mair

If we could get a string of sunny days, corn planting could wrap up in Wisconsin. Sunshine and warmer temperatures are also needed to push along crop development.

Latham® Hybrid LH 5099 SS was planted May 8 in Ripon, Wisconsin. This field shows uniform emergence and growth, but that’s not the case everywhere. Unfortunately, cooler temps are hampering growth across the region.

With the significant rainfall we have had, it is important that growers get out and walk fields as conditions allow.

Call your local Latham seed supplier or RSM at 1.877.GO.LATHAM if you would like a second opinion as to whether replant is needed. Additional tips are available online here.

Southeast Minnesota & Northeast Iowa

Craig Haaland

It was a beautiful, sunny day with temps near 70 degrees in early May when Latham dealers Frank and Matt Wyatt of Hudson, Iowa, planted their corn plot. We’ve received a lot of cold, rainy days ever since. Warmer days are in the forecast, so we these crops should turn the corner with sunshine and heat.

West North Central Iowa

Bart Peterson

Due to rotator cuff surgery, Latham® dealer Marvin Beneke needed a helping hand picking up empty hard boxes from his customer’s farms. I thought was quite the neat collection of antiques at one of the stops we made.

Eastern Iowa

Jerry Broders

Craig Christians, Latham Territory Sales manager, rode with me to visit Latham® Dealer Chris Chriss’ farm in western Illinois. Crop scouting and plant evaluation is part of my job at Latham Hi‑Tech Seeds. This plot emerged 8 days after planting.

Central Iowa

Bryan Rohe

Busy time collecting hard boxes and pallets. Few areas talking about replanting as well. Check your fields as soon as possible.

Western Iowa & Eastern Nebraska

Larry Krapfl

Parked equipment is a common site since we’ve experienced 7 days of rain. Fields are too wet to enter. We’re seeing a lot of ponding. With more rain on the way, it’s likely replant will be needed. Click here for replanting tips.

Northwest Iowa

Darin Chapman

Phil Long, technical agronomist manager for Latham Hi‑Tech Seeds, and Darin Chapman, Latham regional sales manager in Northwest Iowa, are performing on-farm research with a multi-hybrid planter while flying our drone. In addition to studying multi-hybrid performance throughout the field, they also studying tillage practices and planter performance using FieldView. These studies will pair well with Latham’s Seed-2-Soil® agronomic services!

North Central Iowa & South Central Minnesota

Cory Greiman

Sourced by usclimatedata.com

Due to excessive rainfall, ponding is a common sight in fields throughout my territory. More than 16 inches of rain has fallen this season. On average, North Iowa receives about 7.7 inches of precipitation from January through May. Farmers will be busy checking fields and evaluating where replants are needed.

Eastern North Dakota

Brain McNamee

This is a picture of newly established field of Latham 400HVX Roundup Ready Alfalfa in western North Dakota. This field is very sandy/rocky. Overall, this field is a poor producer with a weed problem. This alfalfa was recently sprayed with Roundup, so we’ll be monitoring it to see how it controls weeds and yields.

May 24, 2017

Corn, Crop, Season, Soybeans, Spring, Weather
Latham Hi‑Tech Seeds

From the Field Crop Report: Week of May 17

Eastern North Dakota

Brain McNamee

This field of Latham Hi‑Tech Seeds’ LH 3877 VT2 PRO RIB was planted May 4. Planting depth and spacing looked good. It also emerged really well.

Southeast North Dakota

Gary Geske

A nice rain fell Tuesday morning, so moisture is reaching planting depth. Warm, moist soils will lead to quick germination and emergence. It’s important to get pre-emerge herbicide applied before the crop emerges in no-till and minimum-till fields.

Southeast South Dakota

Ramie Coughlin

A lot of planting progress was made this past week. We got plots planted for Estelline Co-op Grain in Estelline and B&B Sales at Dell Rapids.

Northeast South Dakota

James Keltgen

Beautiful weather prevails! Crops are being planted at a record pace in Northeast South Dakota. Corn is all but finished, and soybeans are closing in on the finish line. Warm, sunny weather has given us a great window to get crops planted and moisture is expected this week to give them a drink.

Northern Minnesota

Ken Highness

Latham® Dealer Ray Beutz and his son, Matthew, planted a Latham corn SuperStrip plot on May 12 near Albany, Minnesota.

Southern Minnesota

Brandon Wendlandt

This Latham Hybrid SuperStrip was planted Monday by Sanborn, Minnesota. While these plots are also good ways to promote local dealerships, SuperStrip plots are primarily used for in-house research. SuperStrips help us determine which products to keep, remove or add to our product lineup. Field notes are taken throughout the growing season and information is analyzed after harvest.

Southern Wisconsin

Greg Mair

Almost 50% of corn acres and 15% of soybean acres are planted in Wisconsin. While we have a ways to go to finish #plant17, good weather should allow a lot of acres to be completed soon.

Latham® corn and soybean SuperStrip plots went in on all corners of the region this past week. We also planted a Latham Corn Silage plot in Barron County.

Fields that were planted between April 20-27 have finally pushed through the soil surface after poor growing conditions delayed emergence. This photo taken of LH 5885 VT2 PRO shows great emergence and early vigor when planted in a no-till situation.

Northwest Iowa

Darin Chapman

Other Brothers Inc. recently joined that Latham® dealer team, and we’re excited to see them hit the ground running! Here Matt Saboe is pictured getting their Latham Hi‑Tech Hybrids SuperStrip plot ready.

South Central MN & North Central IA

Cory Greiman

We’re able to row this field of LH 5099 SS RIB. This SmartStax Refuge in the Bag hybrid has earned Latham’s designation as a Gladiator hybrid, which means it has dual modes of action for above-ground insects including: Corn Earworm, Fall Armyworm, European Corn Borer and Southwestern Corn Borer. This particular hybrid also is a boss on Goss’s Wilt.

Southeast Minnesota & Northeast Iowa

Craig Haaland

A Latham customer near Osage, Iowa, put LH 5509 SS in the ground on Friday, May 12. The weather was absolutely beautiful. It was one of those days when you’re glad to have a reason to spend it outside.

Eastern Iowa

Jerry Broders

Latham® dealer Kevin Squires is passing on the farming tradition to his son, Adam. The duo worked Monday to plant a Latham plot.

One advantage of working with family-owned, independent Latham Hi‑Tech Seeds is the variety of options we provide. Here a farmer cooperator puts in a Latham® SuperStrip plot, which showcases different traits and technologies including LibertyLink soybeans.

West North Central Iowa

Bart Peterson

It’s been a crazy week of weather! Late Monday afternoon, May 15, storms moved across West Central and North Central Iowa. I was driving by the junction of Highways 3 and 17 just east of Goldfield when marble- to golf ball-sized hail began to fall. You could’ve snow plowed the hail because it was that heavy.

Central Iowa

Bryan Rohe

It’s time to check emergence and stand. From what I have seen so far, the stand looks pretty good. Be sure to check all of your fields as recent rains may have caused some ponding and flooding in areas. Click here for tips on evaluating corn replant options.

Western Iowa & Eastern Nebraska

Larry Krapfl

Look at all the technology going into this plot! We planted a Latham soybean plot near Friend, Nebraska, with the following:

8 Roundup Ready 2 products
4 Balance GT*
6 R2 Xtend
1 ILEVO

**Balance™ GT Soybeans are not currently for sale by Latham Hi‑Tech Seeds until Balance Bean herbicide (Isoxaflutole) receives full regulatory approval.

May 17, 2017

Corn, Crop, Season, Soybeans, Spring
Latham Hi‑Tech Seeds

More Updates to XtendiMax® Herbicide Label

Last November the U.S. EPA approved the use of XtendiMax® with VaporGrip® technology on Roundup Ready 2 Xtend® soybeans. It didn’t take long for competitors and opponents of the Xtend technology to point out the limitations, but many of their talking points are now moot.

The U.S. EPA, as promised, has allowed a number of significant changes to the XtendiMax herbicide label. First and foremost, Roundup PowerMAX® and WeatherMAX® formulations have been added. In addition, 34 (and counting) other herbicides are approved for tank-mixing with XtendiMax! There are now more than 110 approved adjuvants that may be added, plus the number of approved nozzles had grown to 26 as of early April.

For farmers who intend to use XtendiMax herbicide, visit their website often to stay abreast of the latest developments.

A section under the TANK MIX tab titled “REQUIRED DRIFT REDUCING ADJUVANTS (DRA’s)” lists products that minimize particle drift if used in combination with certain herbicides and other adjuvants. Products needing DRA’s are clearly spelled out in the herbicide and adjuvant sections.

Visit the XtendiMax website for the latest developments: http://www.xtendimaxapplicationrequirements.com

Another very critical section of the website is “APPLICATION REQUIREMENTS.” Here, farmers can learn what is needed to minimize drift, volatilization and off-target applications of this important herbicide technology.

I’m excited to see so many early-adopters planning to use both Roundup Ready 2 Xtend soybeans, and the subsequent use of the XtendiMax with VaporGrip technology herbicide to help control tough-to-kill weeds in 2017. At Latham Hi‑Tech Seeds, we believe this will be just one of the many new and exciting soybean technologies that farmers will need to combat resistant weeds in the future.

May 16, 2017

Soybeans, Tech Tuesday
Latham Hi‑Tech Seeds

Control Planting Conditions to Maximize Yield Potential

The planters are ready to roll as this is coming to you! That’s why I’m reminding everyone how important the proper start to the season is.

If the planting season gets off to a bad start, it’s only going to get worse throughout the growing season. That’s why it’s so important to plant into fit soil conditions, at the proper depth and at a slow enough speed.

As a farmer, I understand the urgency to get seed in the ground. We’re so eager that sometimes we mud the crop into a less than desirable seed bed, and sometimes we plant at higher speeds to get more acres planted in a day. However, days on the calendar don’t make up for mistakes in the field. Keep in mind that haste makes waste.

A few years ago, I conducted speed and planter depth testing on our farm. I found that our John Deere 7000 planter was most accurate at 4.5 to 4.8 miles per hour (mph), and our yields were the best at a depth of 1.75 to 2 inches. I saw as much as a 10-bushel difference at higher planting speeds and a 20-bushel difference when seed was planted at 1.25 to 1.5 inches deep. Root systems were considerably smaller where the seed was planted shallower and at faster speeds.

Also remember to check depth and spacing each time you move to a different field to ensure depth and spacing works in that field’s soil type and texture. Wishing you all a safe and great planting season!

April 20, 2017

Corn, Crop, Soybeans
Latham Hi‑Tech Seeds

From the Field Crop Report for April 19

The time is here! #Plant17 has arrived, and farmers throughout the region are gearing up for the 2017 growing season. Pictures can often best portray what is happening in the world around us, so we have updated our weekly From the Field crop reports! We will be sharing #crop17 highlights throughout our marketing territory, with a photo or two to accompany it. These pictures are submitted from our Regional Sales Managers who are in the field every day with our dealers and customers. We hope you enjoy our first From the Field report for the 2017 planting season below!

Eastern North Dakota

Brain McNamee

Spring fieldwork in underway. Farmers in western North Dakota are applying anhydrous and focusing on getting small grains planted.

Southeast North Dakota

Gary Geske

There’s still snow in the ditches between Minot and Bismarck, so it’s evident that not all fields are fit for planting yet in North Dakota. Small grains are going in the ground in the southeast part of our state. One Latham® customer who lives north by Rolette said it might be mid-May before they’re able to get in the field.

Northeast South Dakota

James Keltgen

Fog looms in Northeast South Dakota. Very little fieldwork and small grain seeding has been done here as soils are wet. Fieldwork is progressing in Central SD where moisture is lacking.

Southeast South Dakota

Ramie Coughlin

A view of some spring prep work from the driver’s seat in South Dakota.

Planting conditions have been ideal for small grains in South Dakota!! Corn will have to wait, but until then small grains are in full swing.

Northern Minnesota

Ken Highness

Preventative maintenance is underway near Gilby, ND for spring planting.

Southern Minnesota

Brandon Wendlandt

Rain showers have been falling this week across southern Minnesota, but the seed I’m moving around is under cover and dry.

Southern Wisconsin

Greg Mair

Areas of the state were affected by winterkill on their alfalfa acres. Pictured here is a good stand of alfalfa in southern Wisconsin. It’s estimated that 75,000 to 100,000 acres of alfalfa in Wisconsin is suffering from some sort of winter damage.

As farmers wait for fields to dry out, there are still many farms that need to haul manure before planting can begin. A farmer is loaded up with turkey manure headed to the field, attempting to beat the rain.

A semi backs up to the seed shed of a dealer in Wisconsin. As the last bit of corn arrives, dealers are making sure to deliver seed to the growers before they hit the fields.

Seed sits in the shop awaiting dry weather to get planted. Most of the state has been blanketed with rain over the past two weeks, and more rain on the way Wednesday afternoon. Much of the state is waiting for the ground to dry out before working up any ground. Depending on how much rain is received Wednesday evening, I expect tillage equipment and planters to be rolling this weekend.

Northwest Iowa

Darin Chapman

This season we’re looking forward to conducting a variable planting rate and multi-hybrid research study for Latham Hi‑Tech Seeds on our family farm near Spencer. Here my brother, Tim, and my six-year-old son and I are working on the multi-hybrid planter. Photo credit to my nephew, Dan, who’s studying Agricultural Systems Technology at Iowa State University.

We’ve been busy preparing our new planter, which is color coordinated. Blue indicates one particular hybrid and orange is another. Blue supplies the odd rows of the planter and orange supplies the even rows.

South Central Minnesota & North Central Iowa

Cory Greiman

Winter kill is evident in alfalfa fields across North Central Iowa due to ponding and ice cover. Check out these articles on The Field Position to help evaluate winter kill and to manage alfalfa based on winter injury.

Southeast Minnesota & Northeast Iowa

Craig Haaland

A few units of seed has yet to be delivered as wet weather stalled planting progress here in North Iowa. Rain is in the forecast again this week for Wednesday and Thursday.

West North Central Iowa

Bart Peterson

Farmers across western Iowa worked around rain showers to get seed in the ground. In this photo, LH 5096 VT PRO was being planted near Rolfe on April 11.

Latham® dealer Jenna Ricklefs making seed corn deliveries.

Eastern Iowa

Jerry Broders

Latham® seed sorted and ready for delivery.

Central Iowa

Bryan Rohe

Latham dealer in Pella, IA discusses the benefits of using cover crops the last 3 years consecutive.

Western Iowa & Eastern Nebraska

Larry Krapfl

Pictured above is a great stand of alfalfa in western Iowa. Outstanding weather has contributed to the great stand is because of increased seeding populations. Research has shown a remarkable response to increased seeding populations.

April 19, 2017

Corn, Crop, Season, Soybeans, Spring
Latham Hi‑Tech Seeds

Quick Steps to Slow Spread of Soybean Aphid Resistance
The number one soybean insect pest is growing across the Upper Midwest. Recent reports indicate some aphid populations are developing resistance to insecticides, especially pyrethroid products.

While we may not be able to stop the spread of this resistance, we can certainly slow it down by using these best management practices:
- Avoid spraying any insecticide if the economic threshold has not been reached. The accepted economic threshold is 250 aphids per plant in 80% of the field as long as the aphid population is increasing. This should not be confused with the injury threshold, which ranges from 600 to 700 aphids per plant. The economic threshold is designed to give farmers time to apply insecticide before the field reaches the injury threshold.
- Use insecticides with different modes of action just like we use herbicides with different modes of action to help control resistant weeds. Some common examples of pyrethroid products include Warrior®, Mustang®, Asana®, Baythroid® and Pounce®, as well as a host of generic products. Lorsban® is an example of an organophosphate insecticide that may be used for aphid control.
- Avoid adding insecticide to herbicide application just as “insurance” or to save a trip across the field, as this can easily lead to resistance problems.
- When applying insecticides, good coverage is essential. Higher spray volumes and pressure help to move the product down into the soybean canopy.
- As with many potential threats, scouting early and often is crucial to overall success!Soybean aphids can greatly increase in numbers if the weather is cooler than normal and if natural predators are not present.
First identified in Wisconsin during the summer of 2000, soybean aphids are found in 21 states and three Canadian provinces. Besides the damage they do by sucking sap from plants, aphids also are vectors of several viruses that attack soybeans.

Scouting for aphids is key for maintaining the health of your soybean crop now… and in the future. Do what you can now to keep numbers down and to avoid insecticide resistance from building.
April 12, 2017

Agronomics, Crop, Insects, Soybeans