Crops News

Ag PhD Crop Scouting Reports — June 25, 2018


The Ag PhD Crop Scouting Reports are supplied by contributors to Hefty Seed Co., based in Baltic, South Dakota. Find more online at and



Georgetown, IL
Tassels are starting to show and we have plenty of moisture. I believe conditions are perfect for a lot of disease this year. Farmers need to heavily consider a fungicide application at tassel this year. — Tyler Smith

Princeton, IL
Many growers have begun post applications of soybeans this week including a glyphosate product like PowerMax in their tank mix. I always encourage adding 2 ounces of MegaGro as it is a patented glyphosate safener and contains 2 plant growth regulators known to improve root and plant growth. Be safe! — Mike Denton

When foliar feeding and looking at tissue samples this season, remember that different nutrient products show up at different speeds in the plant. For example, a carbon chelate may take longer to show up in the plant and will last longer because the plant will use it as it needs it. — Nate Ihnen



Rockwell, IA
Foliar feed now with 3 gallons of Sure-K for a boost in potassium. Potassium is one of the essential elements that is showing up at lower levels in local tissue tests. One role of potassium is health and disease. — Paul Helland



Garden City, KS
Soil sampling season will soon be upon us. Here is my first recommendation. Start with a grid sample – pH is your number one concern on a soil test and grid sampling is the best way of finding out that variability across the field. pH can absolutely be fixed, but trying to fix it with a blanket treatment can exacerbate a high or a low pH area. I’ve pulled grids on fields that range from low 5s to 8 pH. If a farmer blankets 3 tons/acre of lime, the high pH/high lime areas will only expand and soybeans or sorghum in those areas will lose yield. — Chris Lobmeyer



Breckenridge, MN
As you’re monitoring your wheat crop, be aware of conditions that favor head scab development. High humidity, frequent rain, and warm temperatures are all conducive to fusarium. Using 6.5 oz of Proline at early flowering is a great way to save some bushels and increase yield. — Conor Swenson

Fairmont, MN
Weeds in the soybean fields are starting to pop up fast. Spraying waterhemp that is 3-4 inches tall or less is very critical for success. Spraying 15-20 gal of water can be very beneficial for a good kill. — Sam Geistfeld

Hancock, MN
With scattered rain forecasted for this week, be sure to know the rainfast of the chemicals you are spraying. Each chemical has a specific rainfast length. This set time is the amount the chemical needs to have to fully dry on the plant. For example, Liberty 280 SL has a rainfast of 4 hours, so when spraying Liberty, you have to allow for at least 4 hours without rain after application. — Austin Norby

There are still a few days left to spray some of this wheat for fusarium head blight (scab). The proper timing for application is at 20% to 50% anthesis, or flowering where each wheat kernel will have a small yellow anther hanging out of it. This window is just a day or 2 if you have a uniform stand of wheat, so it is important to be on time. As always with most of these fungicides, performance can be improved with 0.25% of NIS to spread the spray solution over more leaf surface. — Adam Gibson

LeRoy, MN
The corn is most likely at, or getting close to, that V8 stage, which means spraying herbicides without drop nozzles is out. If you want to spray a fungicide on your corn, you most certainly can. We like to wait until the corn is as tall as possible but still be able to drive through. That being said, there are no adjuvants allowed until after full tassel. Spraying an adjuvant now can decrease yield. — Grant Lunning

Olivia, MN
If you want to provide some residual weed control in your soybean or sugar beet fields, you can have Outlook flown on, given the wet soil conditions not allowing ground rigs. It is a good option since not all residual herbicides are labeled for aerial application in Minnesota, and most of the fields in the area are fairly clean. You would get some residual control to help hold back the next flush of weeds which will be coming soon. — John Scheibel

Now would be a great time to see if your soybeans are fixing nitrogen. Pull up a plant and look for small swellings on the roots called nodules. Cut some of these nodules open and if you see pink/red, then you know that the bacteria are fixing nitrogen. If you do not see very many nodules on the roots or they are small, then you may have over-applied nitrogen or you should have inoculated your beans. Keep this in mind for next year. — Tony Hagen

I am seeing a lot of weeds increasing in size before getting sprayed due to the difficult field conditions. With all the large weeds, you should increase your rates if/where allowed on the chemical labels. Talk with your agronomist on rates and additives to make sure you are getting the best weed control possible. — Brandon Howard

Thief River Falls, MN
Some of the early planted spring wheat is starting to head out around the area and the crop is looking great. Protecting that investment with a great fungicide like Caramba at 10-50% flower will protect against powdery mildew, rust, and most importantly, head scab. — Jordan Swanson

Winthrop, MN
If the volunteer corn in your soybean fields is getting tall (over 12”), you need to increase the rate of the product you are using to get good control. Fusilade and Se-Cure have been our best choices on taller volunteer corn. Make sure to add a crop oil (1 gallon/100) in the tank mix as well and some AMS (2 to 4 pounds/acre) if permitted. — Dean Christiansen



Bertrand, MO
The corn is in full tassel and there are some insect issues out there so farmers will be applying a fungicide and an insecticide this week. A fungicide product like Stratego YLD at 5 oz/acre and an insecticide like Mustang Maxx at 3.5 oz/acre should be an advantage with this year’s yield potential. — Albert Duenne



Great Falls, MT
I have had several conversations this week with farmers about resistance management in weeds. When discussing herbicide resistance, it is important to remember the huge genetic diversity found in weeds. For example, 100 wheat plants of the same variety would be very uniform genetically because they have been bred to be that way. However, kochia plants could have 100 different genomes, making each plant unique from all of the others. The genetic diversity of the kochia is both a strength and weakness. Talk to your agronomist about ways to take advantage of the differences in the weeds growing in your field. — Stan Bates

Sidney, MT
According to the NDSU Small Grain Disease Forecasting model in coordination with the North Dakota Agricultural Weather Network, the last 4 days (6/15 – 6/18) or 7 out of the last 13 days have been high risk for foliar diseases in the small grains. Please be scouting fields. Fungicides with multiple modes of action will be best to utilize for disease control. I have also been viewing chickpea plants that are about to flower. I have not personally seen any ascochtya blight on plants yet, but have heard reports that fungicide spraying has started. Know what the disease looks like so that the fungicide applications are done at the most economical timings. Again, rotate the mode of actions for the fungicides so tolerances are not built up. — Chet Hill



Seward, NE
With the recent rainfalls we have been received, these wet conditions may be favorable to white mold development in our soybean fields. If you have a history of white mold, consider spot spraying these problem areas with a fungicide at the R1 and R3 growth stages. — Dylan Codr

West Point, NE
We need to start looking ahead to next year’s planting. If you will be planting corn before April 25th of next year, stop using Flexstar post on soybeans and switch to products like Cobra and Ultra Blazer. — Jared Steffensmeier



Mohall, ND
Palisade 2EC is a great choice for a plant growth regulator for durum. It is best to apply at Feekes stage 8 – that is when the flag leaf is first visible. — Ron Hefta



Gettysburg, SD
If you planted Clearfield sunflowers this year, you need to get your Beyond applied by the 8th true leaf. If you have Express-traited sunflowers, you have up to but not including the bud stage to get your Express applied. The crops and weeds are growing quickly with recent rains and warm temperatures, so be sure to be actively scouting your fields. — Eric Butz

Huron, SD
Engenia and Xtendimax are labeled up to and through R1, which is coming shortly! R1 is when at least 1 flower appears on the plant on any node on the main stem. Keep this in mind when planning dicamba applications! — Kyle Wiese

Kimball, SD
If you have a waterhemp issue in your soybeans, apply a residual like Outlook, Dual, or Warrant when you apply your next pesticide pass. Waterhemp can pop up long after your initial pre- herbicide has run out. — Mike Erickson

Watertown, SD
If you see volunteer corn in your soybeans and you don’t kill the volunteer corn, you will very likely have more rootworm pressure next year when you plant corn. Use Select Max at a rate of 6 to 9 oz/acre with your Roundup, plus surfactant at 1 qt/100 gallons of water and AMS at 17 lb/100 gallons of water. — Russ Werning

Make sure you are cleaning your sprayer tanks out between crops. Products like Erase are good choices to ensure you don’t have any tank contamination. — Beau Wensing



Quincy, WA
Controlling chickweed in timothy can be a challenge. Now that first cutting is off, it is a great time to scout for it. The best results have been coming from using Huskie at 12-15 oz. This comes with some crop rotation restrictions you need to be aware of. Read the label and know what your plan is before using this product so you don’t have a carryover issue which may affect your next planned crop. — Sam Krautscheid


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