ASK THE AGRONOMIST BLOG

Stine’s Ask the Agronomist blog is your source to the latest information from our expert team, including advice and insight on field practices, product recommendations, planting and harvest updates, new technologies, crop management, innovative research and information about how to keep your farm operation running smoothly year round. 

  • 2020 Stine Seed Catalog Now Available
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    2020 Stine Seed Catalog Now Available

    August 01, 2019

    Posted by Stine Seed in Products

    Stine® is excited to offer an outstanding lineup of corn and soybeans for 2020. Now, you can view those options in our newly released 2020 Stine Seed Catalog, available online or by contacting your local Stine Seed sales representative. Here’s a sneak peek of what we have in store.

    Soybeans
    With the industry’s largest soybean breeding program, we have an unmatched selection of high-performing soybean varieties in every maturity range with the trait packages growers want, including:

    Stinebrand Enlist E3™ soybeans: An advanced herbicide-tolerant trait technology with maximum flexibility and convenience, along with three unique modes of action for exceptional weed control — glyphosate, glufosinate and a new 2,4-D choline. Stine is proud to offer growers the broadest lineup of Enlist E3 soybeans in 2020, with 75 different options for growers to choose from.

    Stine brand LibertyLink® GT27 soybeans: A triple-stacked herbicide tolerant system, which offers exceptional yield potential combined with tolerance to three unique sites of action — glyphosate, Liberty® and a new HPPD/Group 27 herbicide (pending approval). We have 69 LibertyLink GT27 soybean varieties in our 2020 lineup.

    Stine brand GT27 soybeans: Combine ultra-high-yielding, elite soybean genetics with tolerance to both glyphosate and a new HPPD/Group 27 herbicide (pending approval). Soybeans containing this trait can also provide growers with an additional measure of protection against potential HPPD/Group 27 carryover. We have 11 GT27 varieties for growers to choose from in 2020.

    Stine Elite Soybeans: Our conventional soybean lineup consists of high-yielding varieties that excel in a number of different soil types and maturity zones. We have 31 conventional options in our new lineup.

    Corn
    Stine operates one of the industry’s largest and most prolific corn breeding programs, developing and evaluating hundreds of thousands of unique hybrids each year. We’re pleased to bring growers the following corn options in 2020.

    Stine Conventional Corn: Not every situation calls for traits. Stine keeps its base breeding program conventional and is one of the only corn companies that actively develops NEW conventional genetics to sell to growers. We have 19 conventional corn options for growers to choose from in 2020.

    Stine Agrisure® Corn: Stine has a complete lineup of Agrisure trait corn in 2020 — 47 options to be exact. From above- and below-ground insect protection to in-crop tolerance to glyphosate and other herbicides, the Stine Agrisure portfolio continues to be one of the top-performing corn trait packages in our lineup.

    Stine HP Corn®A number of our traited and non-traited hybrids feature the Stine HP Corn designation. Stine HP Corn is our one-of-a-kind corn hybrid line created specifically for high-population environments. These hybrids tend to be shorter and narrower in stature and feature the stalk strength and disease package to thrive when planted in higher densities, helping growers achieve outstanding yields. Stine is offering 11 corn hybrids carrying the HP Corn designation in 2020.

    With such an extensive corn and soybean lineup, growers can be confident knowing that Stine will have the right option for every field in their operation. If you have any questions regarding the 2020 Stine Seed Catalog and our lineup, please contact your local Stine sales representative.

     

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    Extra Moisture? Watch for Waterhemp

    July 24, 2019

    Posted by Aaron Stockton in Crop Management

    As the name of the weed suggests, waterhemp — a member of the pigweed family that affects soybean fields — thrives in areas where there’s been a lot of moisture. This year, that’s pretty much the entire country. Flooding exacerbates the spread of waterhemp, which a few years ago used to be a problem only in the South but has gradually made its way up to the northern United States. Now, to make matters worse for growers, scientists have discovered another strain of herbicide-resistant waterhemp.

    According to the University of Illinois Extension, certain strains of waterhemp are now resistant to the Group 15 herbicide family. Extension experts note this includes herbicides with the following active ingredients: acetochlor, dimethenamid, metolachlor, pyroxasulfone and S-metolachlor. Waterhemp has also shown resistance to six other herbicide groups, including Group 2 (ALS inhibitors), Group 5 (triazines), Group 14 (PPO inhibitors), Group 9 (glyphosate), Group 27 (HPPD inhibitors) and Group 4 (2,4-D).

    What does this mean for soybean growers? Growers will need to use multiple herbicide families, mixing up different modes of action. If they have a weed that’s resistant to whatever herbicide they’re using, multiple chemical families within your chemical program are a must. Start with clean fields and then come back with a post-emerge after the crop is up and weeds are within the legal range. You can even come back and spray a different family within the post-emerge, adding additional residual into the mix.

    Growers who are using the Stine® Enlist E3soybean system this growing season will be at an advantage. Waterhemp shows itself to be increasingly problematic when it comes to single-mode or glyphosate-based soybean platforms. This reason is why we are so excited to see the Enlist E3 soybeans finally hit the market. So far, we have seen it in burndown scenarios, and the weed control of not just waterhemp but also marestail and other significant weeds has been absolutely fantastic! My expectation with all the rain we are receiving is that weed pressure will continue to be tremendous, and those weeds, especially waterhemp, will be very robust and tough to kill this year. Having a platform like Enlist E3 is a lifesaver because it offers three modes of action to tackle these weeds.

    Experts note waterhemp can reduce yields by up to 44 percent. Each waterhemp plant has the ability to produce up to one million seeds, making it extremely problematic to control. At Stine, we’re working diligently to test different traits and herbicide modes of action in our test plots. Our goal with these plots, located in Adel, Iowa; Edgerton, Kansas; Cedar Rapids, Iowa; Windom, Minnesota; and Reynolds, Indiana, is to test what works best against weeds in general. We’re looking at different types of applications and chemistries to see what’s going to do a better job this year in controlling all weeds. And with the wet condition this year, it’s going to be interesting to see which herbicide combination really works the best and how the weeds affect yield.

    Talk to your local Stine sales agronomist if you’re experiencing problems with waterhemp and other weeds this growing season.

     

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    Part Three: Herbicide Issues to Look for in a Late Planting Year (Like This One)

    July 17, 2019

    Posted by Stine Seed in Crop Management

    Next up in our series of what to be on the lookout for in a late planting year (like this one), we discuss why plants are growing slowly and what chemicals are showing a greater crop response this year.

    Why are plants growing slowly? And why are chemicals showing a greater crop response this year?
    In reality, these are two separate issues that are closely related. Slow-growing plants in many areas of the country are not a result of subpar seed, fertility or any other input but rather poor environmental conditions. Many areas of the country are too wet, which causes saturated soils.  Water drives out the air in the pores of the soil and, in turn, leads to a lack of oxygen. Oxygen is required for photosynthesis and for microbial activity, such as nitrobacteria, which make nitrogen available for soybean nodulation. 

    Some areas are too dry, and this leads to a lack of soil solution bringing nutrients to plants through mass diffusion, so plants may show signs of nutrient deficiency. Adding nutrients is not necessary, as these plants will either grow to interact with available nutrients or soil moisture (from rain) will bring the nutrients to the plants. In both cases, this can lead to slow-growing, chlorotic plants.

    The second issue has to do with why we are seeing a greater crop response from traditional chemistries that are used annually. As plants grow at a slower pace, all the functions of life (metabolic) are slowed as well. We might think of this in terms of when we are sick with the flu, we tend to have less energy and have less of an appetite than when we feel 100 percent. Some of the chemistries that we have seen issues with are listed below.

    *Note: Cool and wet early-season growth conditions will favor slow plant metabolism of the pre-emerge herbicides. Warmth and humidity with fast-growing conditions in early summer will affect the plants when applying post-emerge herbicides. We have seen herbicide injury in corn and soybeans that have shown up in the following:

    Photosynthesis inhibitors or Group 5 mode-of-action herbicides. Active ingredients include Metribuzin and Atrazine, which have been applied in slow, cool-growing conditions. The soils that have been most affected are high pH or sandy soils. Leaves or the whole plant may turn yellow and stunted, with the veins remaining green.

    Pigment inhibitors and mainly the Group 27 site of action. Consists of products like Balance Flex®, Callisto®, Impact® and Laudis®. Leaves will become chlorotic or have a bleached white banded appearance and can become necrotic. Usually seen on the older leaves, and most plants grow out of it, but slow-growing conditions could lead to yield loss or even death of individual plants or field areas.

    ALS inhibitors or the Group 2 site of action. Products include First Rate®, Python® and Hornet®. They usually cause the beans to have reddish veins on the underside of the leaf with some yellowing and stippled leaves. These products can lead to bottle brushed roots in both corn and soybeans. These products can carryover in the soil from one season to the next.

    As the post-applying season gets into full swing, you may see more damage from the following:

    Cell membrane inhibitors, mainly the Group 14 site of action. This includes products like Cadet®, Flexstar®, Cobra®, Sharpen®, Authority® and Valor®. Applied pre-plant, these products can expose the hypocotyl or cotyledons to high rates on soil surface or rain splashed onto the stems. This can cause plant loss or brittle stalks later in season. Post-applied herbicides cause bronzing and speckling of leaves if sprayed too late in the season. Carryover can become an issue if dry conditions persist late into the growing season.

    Finally, the one herbicide that growers especially need to be on the lookout for:

    Plant growth regulators. This is a Group 4 site of action that includes active ingredients Dicamba, 2,4-D and Clopyralid (Stinger®). Symptoms may include twisting and downward bending of stems. You may also see cupping and curling of leaves or buggy whipping of corn plants. Corn can become brittle, and green snap is definitely a concern. There has also been a lot of leaf burn lately due to certain surfactants added to post-applied herbicides. This is mainly because of spraying during the heat of the day with high humidity, so make sure you are following the label rates of surfactants. Most plants will grow out of this with a favorable extended weather forecast.

    Management Tip: In all of these instances, an improvement in growing conditions will enhance the plant’s ability to metabolize these herbicides and will, therefore, improve the appearance of the plants in question. Normal fertility practices should be maintained, so if you plan to side dress with supplemental nitrogen or micronutrients, procedures should be followed according to soil samples and plant nutrient requirement according to yield goals.

    For questions, please contact your local Stine sales agronomist.