Crops News

Ag PhD Crop Scouting Reports — May 31, 2017


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



Augusta, AR
Winter wheat harvest has begun. Extremely early yields are close to 90 with areas up to 120 bushels/acre. Test weights are ok at 58. This isn’t that bad considering all the heavy rains since grain fill. Prosaro definitely pays in these kinds of years. — Perry Galloway

Zidua and Metribuzin are holding – it’s lights out in some heavy pigweed infested fields!  We will be overlapping another 1.5 oz of Zidua with the first Liberty application.  This gets pricey, but I don’t know if we have a choice with the heavy pressure.  My Ricestar HT that went out in the rice last Wednesday did a good job controlling some 10 to 12-inch tillering barnyardgrass. When you have the moisture and that stuff hits, it does a great job. — Joey York



Georgetown, IL
With most corn out of the ground, a number of the highest yielding farmers in the area are starting their tissue sampling programs. Tissue sampling is a great way to observe a “good” area and a “bad” area in a field. If you do this every week for 10-12 weeks of the growing season, you will be able to see what nutrients you run out of. This information is a valuable tool when adjusting your fertilizer application for the following year. — Tyler Smith

Princeton, IL
I looked at an emerging corn field with a grower yesterday. Areas in the field were coming up slower than the rest, and upon further examination we found the rows were silted over and the corn was almost an inch deeper than the rest. There is no fix to this issue for this crop. — John Becker

I have seen several people working on brush in fence lines during the past wet period.  Tordon 22K is still a great product for applying to stumps after cutting brush to eliminate regrowth.  The specific product many of these people are using is a ready-to-use product (Tordon 22K RTU) in a quart squirt bottle. — Mike Denton

I was in a field with a farmer over the weekend. He could see a corn emergence problem from the road. What we found was his planter had not completely dropped and his seed was on top of the ground. The only fix was to replant the pass. — John Becker

We have seen some corn today that is very close to V3 that is only a few inches tall.  As you can return to the field to resume spraying, continue to stage the crop for post applications.  With the small size, one might be lured into thinking it is not as far along as it is and could injure fragile seedlings with an off-label application.  — Mike Denton


Rockwell, IA
Some of the bean fields in the area didn’t get their pre-emerge herbicide on before emergence. There are still some good herbicides you can use to get your residual down. Anthem Maxx or Warrant are a couple choices we’re seeing farmers run with this week.  — Mike Jaeger

Sheldon, IA
With the heat and sun returning, some of the corn pre’s applied earlier in the year are showing activation again.  Products like SureStart II and Resicore are working on smaller weeds that have emerged since spraying. Make sure you are following up on these weeds to see if any other actions will be needed. We’re seeing the most weed escapes in the end rows. These spots can have a little more compaction, leading to a place where weeds could thrive.  — Nathan Kloft



Breckenridge, MN
A lot of corn fields are seeing high weed pressure. For fields with morningglory and buckwheat, spiking in a few ounces of Clarity would significantly help with control.  After V2, Status and DiFlexx are preferred due to the corn safener technology each of them contains. — Tia Johnson

Fairmont, MN
A lot of corn will be growing quickly in the next few days with the heat coming, but so will the weeds.  Make sure you check the labels of your products; some are only labeled up to 11-inch tall corn.  A few popular ones you might be using are atrazine, Resicore, TripleFLEX, or Harness.  All of these need to be sprayed before 11-inch tall corn to avoid any crop injury.  Several others are at 24 inches and 30 inches tall, so just make sure you know what heights your post corn products can be sprayed to. — Mike Bates

Hancock, MN
Corn appearance is improving in the area.  A couple half days of heat and sunshine got the top leaf or 2 to extend and green up.  The most noticeable thing to me is seeing how close together the collars are around the stalk.  Early season growth in cool conditions means a shorter distance between nodes.  Later in the season it could lead to lower ear placement than normal.  For now, it means a smaller photosynthetic factory (plant).  An idea to consider (especially if it’s a hybrid with low ear placement) is applying some gibberellic acid or RyzUp SmartGrass.   This will trigger some cell elongation and a bigger plant. — Adam Gibson

Janesville, MN
If you are spraying the product Resicore, make sure to monitor the height of your corn. If the corn gets above 11 inches not only is Resicore no longer labeled, but you begin to lose some of the best and cheapest options for weed control.  Also, watch the labels.  With a product like Halex GT, for example, the label says 30 inch tall corn but not exceeding V8 or 8 fully developed leaf collars.  With cool growing conditions and not much stem elongation, V8 might happen by 15 inch tall corn.  Scout fields before spraying. —  Ray Johnson

LeRoy, MN
Some growers are thinking about tankmixing some dicamba with their post-emerge product like Armezon Pro, Halex GT, or even Resicore. While this is certainly an option, all dicamba products aren’t created equal. For example, Xtendimax and Engenia have greatly reduced volatility potential, but they still don’t have a corn safener in them. DiFlexx does have a safener, which makes it a better option on taller corn (anything above V2), but it does have some volatility which makes neighboring crops more of a concern. Status may be the best choice in V2-V6 corn as it contains a very low rate of dicamba (decreasing the volatility risk), it contains a safener for corn, plus it has a second active ingredient to kill the weeds.  Make sure you know which product you are using and the key components to that product. — Grant Lunning

Marshall, MN
When applying a pre or post residual chemical to corn or beans, never believe that “you’re just spraying black dirt for fun” when little to no weeds are present. These great products will help stop yield-robbing weeds from growing and eliminate the germination of millions of seeds later on in the future. — Jeremy Jensen

Olivia, MN
I have had a couple reports of pre-emerge injury on soybeans. Most of the time the soybeans will grow out of the injury, and even though the beans look dead, they are not. Wait a few days with warm weather before deciding to replant or not. — John Scheibel

It is about time for the first post spray of herbicide on corn. If you are using an HPPD herbicide on your corn this year, make sure you do not apply too much. You may see carryover into your soybeans next year. — Aaron Spronk

If you are planting beans this week, be sure to get a pre-emerge herbicide on such as Authority or Valor.  If your beans have already emerged, you can use products such as Outlook or Warrant for residual. — Tony Hagen

Thief River Falls, MN
Prepare for your fungicide applications on wheat.  Stripe rust sets in when spores activate in cool conditions. We’re seeing farmers in this area protecting their crops with fungicide treatments at flag leaf (or prior if necessary).  — Alex Yaggie

Checking your planting population is important.  If you haven’t done so already, go to your fields and check it. The Ag PhD Planting Population Calculator is a good tool that you can use to aid in determining planting population and stand counts for the crops on your field. — Rachel Klein

Controlling Roundup Ready volunteer canola post-emerge in Roundup Ready soybeans has been tough in our area. One of the best options to control Roundup Ready canola is Pursuit or a product with Pursuit in it. I would suggest using Extreme (glyphosate + Pursuit) at 1.5 to 3 pts/acre on your first spay on soybeans.  Rotation restrictions can be lengthy for some sensitive crops, so be sure to check the label before applying Pursuit.  — Jordan Swanson

Winthrop, MN
I’ve been in a couple of soybean fields this spring that look pretty tough. Most of this is from putting down a PPO type pre-emerge and having a heavy rainfall causing some splashing. There is no need to panic; it’s mostly a cosmetic thing. Soybeans are pretty tough and can handle some stresses in early stages with little to often no effect on yield. — Tyler Gasow

With all of the rain we have had, there has been some nitrate leaching in many area fields.  One day with a nitrogen shortage will show up in yield loss.  Be sure to be out there to take a nitrate test in each field to know when and how much you need to sidedress.  The best way to do this is to take a soil nitrate test in the same spot in the field each week.  This is the cheapest and best way to be certain what is left out there for nitrogen.  — Matt Vogel



Bertrand, MO
Wheat harvest will begin this week in our area. Wheat looks pretty good overall. — Albert Duenne

Some farmers are applying Liberty on their Liberty Link soybeans early post right now. For best results, spray weeds when they are smaller than 4 inches if possible.  32 oz/acre should provide good weed control for now. A second application may need to be applied later. — Albert Duenne

Hayti, MO
Recent rains have prevented most soybean fields, Liberty and Xtend, from the first post application.  These fields need to be scouted and sprayed as soon as possible, especially if there is pigweed history. — Danny Stevens



Sidney, MT
As growers are getting ready to spray the Roundup Ready crops, a number of them will be adding MegaGro.  MegaGro is a patented safener for glyphosate at the 2 oz/acre rate.  Farmers have also commented that it stimulates root development and increases foliage. — Chester Hill

In the Circle, MT area, we noticed some yellowing of some pea fields.  It was misdiagnosed as Spartan Charge injury, but further investigation showed that these fields actually suffered from root rot injury.  After further discussion with the producer, no seed treatment was applied.  A seed treatment like Apron Maxx, Obvius, and others would have helped protect against pythium, fusariam and rhizoctonia root rots.  — Chet Hill



Laurel, NE
I’m seeing a lot of crusting in soybeans; make sure you’re checking your fields.  You might want to turn the pivot on if you have one to help them out of the ground. — Rusty Reifenrath

West Point, NE
Here are some scouting tips to find out what stage your corn is in right now. V1-V5: At V1, the round-tipped leaf on first collar appears and nodal roots elongate. By V2, the plant is 2 to 4 inches tall and relies on energy within the seed. V3 begins 2 to 4 weeks after VE.  The plant switches from kernel reserves to photosynthesis and nodal roots begin to take over. Around V4, broadleaf weeds should be controlled to avoid loss. By V5, the number of potential leaf and ear shoots are determined. The plant is 8-12 inches tall and the growing point remains below soil surface. — Jacob Gubbels



Hurdsfield, ND
When tissue sampling, be sure to take samples from a good area of the field in addition to the problem area. This will give you something to compare when getting results back. Yellow wheat could be nitrogen or sulfur deficiency. Get some tests done and treat it accordingly. — Emily Kline

Mohall, ND
I was visiting with a local barley producer who was looking for a weed and disease control tankmix.  We’re going to use Axial Star, Brox M, and a propiconazole.  After the severe winds on Saturday, we’re going to give the barley a day or two to recuperate before we spray. — Ron Hefta



Aberdeen, SD
If you didn’t get your pre on your soybeans or are considering overlapping your residuals, consider a tankmix of Outlook at 14 oz and Extreme at 1.5 pts/acre. Growers have commented this tankmix will require some rain to activate, but that it takes less rain than other products they’ve used.  This will provide you with a residual product that is great on both grasses and small-seeded broadleaves that are not ALS resistant. — Kalen Kjellsen

Baltic, SD
If you are a producer that cuts silage, now is the time to add RyzUp SmartGrass to your fields.  We have seen an increase in plant stalk diameter and 1.5 to 2 ton increase in tonnage.  The product is just a growth regulator that causes increased cell elongation and faster growth rate.  One of the added benefits is better standability, too. — Rob Fritz

Post spraying is just around the corner, so now is a great time to make sure you have the right additives for your herbicides.  It is crucial that you use the appropriate additives to ensure a proper weed kill.  Double check the labels for adjuvant information and make sure to target weeds that are 2-4 inches in height. — Lee Fischer

Centerville, SD
I have had a few questions come in from farmers about seed treatment and if it still pays. My answer was that it will most likely pay. Even though the soils are warming up and drying out a little, there are still diseases that can be present in warmer soils that can affect plant stand and cause problems later in the season. Diseases such as rhizoctonia, fusarium, and phytophthora can thrive in warm soils and can be damaging to soybean yields. — Travis Petty

Gettysburg, SD
When doing burndowns, make sure you are adding MSO in the tank. With these dry conditions, the weeds aren’t taking in the chemical as well as they usually do. — Kyle Hawkinson

Huron, SD
Wheat is fully headed out in the area, and by the end of the week it will be time to spray a fungicide. The optimum time to spray fungicide during heading is after it’s reached 15% flowering. A good option is Prosaro at 6.5 oz/acre. Prosaro controls fusarium head blight as well as rusts. A less expensive option is using Folicur at 4 oz/acre. Folicur isn’t as good as Prosaro in terms of scab control  but will still help control rusts. — Kyle Wiese

The weeds are coming in unsprayed pastures right now. We have been seeing a lot of Canada thistle.  Farmers who have already sprayed this spring had good luck with GrazonNext HL. Not only did it do an excellent job on the thistles, it also picked up the wormwood, pigweed, and curly dock. The rate of GrazonNext HL most of them ran with was 1.5 pts/acre. — Norland Hofer

Kimball, SD
We’ve seen great results from applying a fungicide to alfalfa: less disease and significantly less leaf loss when cutting.  — Mike Erickson

There are a variety of corn pre-emerge products on the market that are working quite well this year. If you still have some residuals to get out there on your farm, keep in mind that not all of them have the same application restrictions.  Products like Resicore and Harness Extra can only be applied up to 11-inch tall corn. Atrazine is limited to 12 inch tall corn.  While Halex GT has a label up to 30 inch corn, it is also limited in that it must be applied before V8 which will happen by 12 to 15 inch corn this year due to the cooler growing season so far. — Joe Fox

Watertown, SD
If you need to get some broadleaves sprayed in your corn and you have already sprayed a HPPD product down, you can come back with Status at 3 to 5 oz/acre tankmixed with glyphosate. — Jack Beutler

If you have a few dandelions around the yard, there are a couple products people have been having good results with this spring.  Trimec Classic does a nice job.  The use rate is 4 oz/gallon of water if using a hand sprayer. The new 2,4-D choline product, Freelexx, has virtually no volatility and is a safer option if you have trees and flowers close by.  4 to 6 oz/gallon is a good rate to use. — Russ Werning



Quincy, WA
As first cutting alfalfa comes off, keep in mind that the plant is struggling.  It has gone 10-15 days without water, nodulation is down, and overall health is down.  One way to overcome this is with an application through the water of balanced nutrition.  There are many options to choose from.  Pick one with nutrients that are highly available, like chelated phosphorus, and efficient potash.  Small amounts of nitrogen and sulfur will take up the lag time until full nodulation.  This will help your alfalfa get off to a great start and put money back in your wallet at second cutting. — Dave Dye

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