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Latham Hi‑Tech Seeds
#FromtheField – Week of May 22
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Latham Hi‑Tech Seeds
Staging and Application: Make the Right Decisions
Planting across Latham Country has been progressing at a rapid pace and it will not be long before post-emergence spraying will begin. When to spray, what to spray, should I spray . . . these are some of the questions growers need to consider before heading to the field. I believe “when to spray” is one of the most critical decisions a grower will make. Damaging or injuring a young plant can have lasting affects that may not be visible to the naked eye. Understanding growth stages and relating this to the labeled requirements is a key to successful growing season. Let’s take a look at corn first.
Labels typically refer to growth stages for application timing and the chart below is a good reference.
Image: University of Illinois VE Stage – Corn emergence occurs when the coleoptiles reach and break through the soil surface. Normally, corn requires approximately 100-200 GDUs to emerge, which can be four to five days after planting. At this stage, growth is also taking place below the ground as the nodal root system begins to grow.
Emergence may occur as rapidly as four or five days after planting in warm moist soil, or may take three weeks or more in cool soils. A new leaf will appear about every three days during early growth, while later leaves developing during warmer conditions may appear in one to two days. Full season hybrids in the central Corn Belt typically can produce 21 to 22 leaves. Earlier maturing hybrids will produce fewer leaves.
Keep these numbers in mind as you plan out your season and prepare to spray your fields. Within a month after planting, a corn plant can go from the bag to V5-V7 if conditions are favorable.
Soybeans in a given field will not be in the same stage at the same time. When staging a field of soybeans, each V or R stage is defined when 50% or more of the plants in the field are in or beyond that stage. This makes it important to understand staging and development since not every plant in the field will be at the same stage when determining application timing. The chart below is a good reference for staging.
The general rule of thumb is to figure five days between growth stages in soybeans. The most important growth stage is R1 which is classified as one flower open at any node on the main stem. Soybean flowers are very sensitive and herbicide application should be avoided at this stage. R1 can begin before canopy closure and the temptation is there to make that final application before canopy closure. A good pre-plant program can help avoid the need for late season spraying and a few late escapes is not worth the consequences from spraying post-flower.
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Latham Hi‑Tech Seeds
#FromtheField – Week of May 8, 2023
Take a look across Latham Country! We’re coming to you every week.
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Latham Hi‑Tech Seeds
#FromtheField – Week of May 1, 2023
Take a look across Latham Country! We’re coming to you every week.
Latham Hi‑Tech Seed’s Corn Plot going in Northern Iowa!
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Latham Hi‑Tech Seeds
Latham® Corn Seed: Your Passport to Quality
By the time Latham Hi‑Tech Seeds offers a new corn hybrid, the number of places it has traveled in its developmental process is pretty “a-maize-ing.”Let’s look at the developmental timeline and how your bag of corn seed gets so many frequent flyer miles. It can take at least five years to create a new hybrid with a new seed parent. These new corn lines like to travel. As a breeder, I become the travel agent coordinating their travel plans.
What are some of the popular destinations for these lucky kernels? We use fields in Hawaii, Mexico, Chile and Argentina. By using these countries, we can plant fields year-round to accelerate our development process. In some cases, we can get three growing seasons in one year.
We use these locations to develop new parents, remake successful hybrids, create new experimental hybrids to test each year and produce hybrid for new releases. No one country can efficiently meet all our needs, so using multiple locations allows us to do different processes to deliver a new product to you.
Your family uses passports to travel and gets inspected by the TSA to get on the plane. A corn family needs similar documents for travel. The difference is that your family typically can travel and get into a country within a day. Each seed shipment we send or receive needs its own inspection and unique documentation, depending on where it’s going. Seed is further inspected upon arriving at its destination. This trip can take up to a week or more if its paperwork isn’t accepted. Delays can affect whether the seed arrives home in time.
The next time you look at a bag of Latham brand hybrid seed corn, know that it might have as many airline miles as you do. Unfortunately, I haven’t found a way to collect and use those frequent flyer perks!
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Latham Hi‑Tech Seeds
Breeding Tech Tools
Like our planting and harvest monitors, corn breeding technologies today improve the speed, accuracy (reliability) and cost of identifying, developing and delivering improved genetics to your farm gate. In this article, I’ll try to briefly describe a few of the most widely used tech tools in developing Latham Hybrids. Like electronic tools, they can be a distraction standing alone, but when linked together into a systematic process they create a powerful platform for continuous improvement.
Unlike traditional methods, “Dihaploid Breeding” (DH) creates homozygous (genetically fixed) male or female corn inbreds quickly. What once took five generations of manual self-pollination can now be created in just two or three generations. Not only do DH’s speed the creation of new inbreds but because they are uniform, they improve and speed field testing required to identify performance. DH delivers inbreds faster (commonly called “instant inbreds”), with near-perfect genetic uniformity at a moderate cost.
Sorting all those new inbreds can become a bottleneck in finding commercially viable candidates. Similar to trying to find NFL players among thousands of college athletes, corn breeding also requires a large pool of candidate inbreds — as quickly as possible. Thankfully, selecting for inbreds with “Favorable DNA” (genes with proven performance) has never been easier or cheaper. Breeders used to spend thousands of dollars to identify a few genetic markers on a single inbred to make associations with key traits such as yield or disease tolerance. Today, we are fast approaching a capability to sequence an entire corn inbred genome (all genes) for less than a dollar. Considering that corn has more genes than humans (on fewer chromosomes), detailed genetic data can enable breeders to quickly select best “candidate” inbreds.
To speed development even further, “Predictive Breeding” can now use genetic data to now simulate some field performance prior to testing in the field. While this will never replace actual field testing predictions, it enables breeders to discard the “chaff” from the wheat — inbreds with low probability of good performance before they’re ever field tested.
Lastly, once commercial lines are identified, “Embryo Rescue” can cycle four generations of trait conversion in the lab and greenhouse in a single year, to deliver trait conversions in two years instead of what used to take four to five years.
None of these tools stand alone, but when paired together they create a powerful process to speed development, improve uniformity and reduce developmental cost of delivering improved Latham genetics to your farm.
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Latham Hi‑Tech Seeds
#AsktheAgronomist – Why is Sulfur and Nitrogen Important?
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Latham Hi‑Tech Seeds
Mitigate Weather Risks with Best Management Practices
Weather concerns are top of mind as farmers across Latham Country look ahead to spring 2023 planting. Customers frequently ask us how to mitigate risk from the 2022 wet planting season.While we want to maximize the yield potential of early planting, 2022 data shows us that delayed planting can result in very good yields — and better yields than planting when conditions are unfit.
Consider these factors to successfully mitigate potential risks of delayed planting:
- Minimize compaction during field preparation.
- A uniform seed bed creates the best opportunity to plant your crop with precision.
- Minimize passes in the spring while creating a uniform seed bed.
- Be careful not to cause sidewall compaction of seed trench at planting.
- Plant your corn crop with precision. We want all plants to emerge within 72 hours. This creates the best root system to maximize water use through the entire growing season.
- Plant a consistent seed depth.
- Check for consistent seed spacing.
- Ensure great seed-to-soil contact.
- Delay planting if cold temps or cold rain is forecasted within 72 hours after planting.
- Promote a healthy root system with fertility. Good fertility programs maintain a healthy, strong root system to effectively use available water.
- Starter fertilizer gets corn plants off to the best start possible.
- Side-dress Nitrogen in a timely manner to nurse optimum plant health.
- Maintain a good fertility balance, using soil testing as a guide.
We suggest staying with a hybrid selection plan that does not vary significantly from previous years. A couple management changes at planting time to get your crop off to a great start will result in more success than totally changing your hybrid selection.
Remember, most corn yield is created in July and August. Get your plants off to the best start, so they can take advantage of that part of the growing season. Don’t get discouraged if you encounter a bit of a delay. Stick to the hybrids in your original plan through the end of May.
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- Minimize compaction during field preparation.
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Latham Hi‑Tech Seeds
Success with Biologicals Starts with Optimizing Your Soil Fertility
Precision Agronomy Advisor, Phil Long One reason Latham Hi‑Tech Seeds opened its Premier Agronomy Center on the Latham family’s Iowa Century farm was to collect data using real-world practices and to research solutions for real-world problems. More farmers are interested in biologicals to reduce fertilizer and other input costs and/or to build soil health.
A biological product, or biofertilizer, contains living microorganisms that promote fertilizer efficiency or plant growth. Most of these products are naturally occurring in the environment but likely do not occur in high amounts in your field.
At Latham’s Premier Agronomy Center in 2022, we used Pivot Bio PROVEN® and Azotic Envita® on corn. Both nitrogen-producing bacteria products were trialed on a large scale and applied in-furrow with LH 5245 VT2 PRO RIB. PROVEN yielded 213.1 bushels per acre (bu/A), and Envita yielded 208.1 bu/A while the untreated LH 5245 yielded 206.2 bu/A. (Also please note that I applied about 40 lbs per acre less nitrogen on all the biological products, so I saved about $20 to $30 per acre when accounting for the product cost.) We have seen similar past results with PROVEN on our farm despite the dry conditions we have had. Envita also may be sprayed over the crop in-season — a process that our team will try in 2023.
Another biological/foliar product that I’ve used on my own farm for soybeans is BW Advance from BW Fusion. This product has foliar nutrients plus biologicals. When applied around soybean reproduction time, it can help reduce flower and pod abortion plus reduce moisture loss during drought stress. It takes about a 1.5 bu/A yield increase to pay for the product at current soybean prices. In 2022, I saw an average of 2.3 bu/A advantage. Keep in mind, 2022 was very dry and this particular field has some underlying fertility issues.
If you are going to try biologicals, you must take care of pH and other soil fertility deficiencies. The microbes in your soil, especially bacteria and fungi, thrive based on proper pH and physical soil environment. For example, if you have a pH of 5.0 or heavily compacted soils, you’re not going to see a boost in soil life until you correct those issues.
This year I used two foliar/soil-applied products, Midwest Bio-Tech’s Chandler Soil and TerraMax’s Ag Soft. The goal of these products is for compaction alleviation and residue management. I’m using these products on our cover crop and no-till plots. During the next few years, I will share results and show any soil structure changes. We also use seed-applied products, including Talc U.S.A.’s Microsurge inoculant and Encompass, as well as TerraMax’s Vertex and Micro MX.
How will we know which products may benefit our farm the most? Our plan is to try them! I will share soil health tests and how they can aid us in continuing to decipher the complex world of biologicals.
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Latham Hi‑Tech Seeds
Match Hybrids to Your Management Style
Precision Agronomy Advisor, Phil Long Agronomists often tout the merits of selecting hybrids to fit your soil types, but it’s also important to select hybrids that match your management style.
Latham Hi‑Tech Seeds’ Premier Agronomy Center provides opportunities for us to learn and share how Latham® products interact with the environment and perform under different management styles. In 2022, we adapted our stress wheel study to show how different Latham brand hybrids react to population differences. We planted 20 different Latham hybrids at both 24,000 and 36,000 plants per acre (ppa) to track how each hybrid adjusts its ear flex – or yield – to high- and low-competition environments.
Overall corn yield comes from three areas: (1) plants per acre; (2) ears per plant; and (3) weight per ear. If we look specifically at an individual corn plant, yield comes from these three areas: girth in the early season, length in mid-season and kernel depth in late season. The hybrid stress test helps us better understand how your favorite Latham hybrids adjust their yield in high- or low-stress environments, which in turn helps you better understand when to reduce stress for these hybrids.
For example, if a hybrid gets most of its yield from flex in girth, you should reduce early-season stress. Plant these hybrids in warm soils; provide fertility at the planter, and make sure nitrogen is in an available form early in the season. All hybrids determine girth based on how healthy or stressed the plants are from emergence to V7, so anything you can do to help them at that stage retains more yield.
The critical time for hybrids that flex in length is from V8 to R2. Making sure these hybrids are healthy in early summer is more important. Side-dress applications are beneficial to these hybrids.
The last group is those that flex in kernel depth, which occurs from R3 to R6 when the corn is filling its kernels, so nutrients move from leaves to the ear. These hybrids can benefit greatly from fungicide because it gives them extra time in the grain fill stage to add weight to the ear.
Although we always talk about hybrids flexing up for bigger yields, a corn plant thinks of it differently. It starts with very high expectations and then flexes down in each direction based on the stress it encounters during the season. Each hybrid’s genetics can vary by how much emphasis it puts on these three areas of yield.
We were intrigued by what we learned from our stress test in 2022 and look forward to learning more in 2023 about how our hybrids adjust their yield. Talk with your local Latham® rep to help you match our hybrids to your management style. Each local salesperson is supported by a team of seed specialists located across our six-state territory.
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