The more we add to the tank, the more chances antagonism can occur, especially when we tank-mix contact and systemic herbicides together. The larger weeds become, the greater the chance antagonism will occur. Grass or volunteer corn herbicides like clethodim can have antagonism, especially when mixed with certain Group 15 herbicides. One way to overcome the antagonism is to increase the clethodim rate to 12 oz. (2 lb. ai. product)/A. Products such as Enlist One® and Liberty® are very effective on glyphosate-resistant weeds like waterhemp and giant ragweed. However, Enlist One + Liberty will be weaker on grasses compared to Enlist One + glyphosate. One solution would be to add clethodim, but antagonism can occur when tank-mixed with Enlist One.
Categories: Agronomy, Agronomy Talk
Tags: Agronomy, Herbicide, weed management, enlist
There is a difference between residual activity and soil activity. Residual herbicides typically suppress weeds from germinating for four to five weeks. Examples include: Authority®, Valor®, Fierce®, and Zidua®. Products that have soil activity can suppress weeds for 7 to 14 days but will not have enough activity to prevent future flushes of weeds later in the season. Engenia® and XtendiMax® can suppress the germination of small-seeded broadleaf weeds such as waterhemp, but we must pair Engenia and XtendiMax to achieve satisfactory weed control.
Tags: Agronomy, Herbicide, Dicamba, soil, weed management
Replant is always a difficult decision to make, but what is the best option to terminate a failed corn stand? One option could be tillage, but depending on the type of tillage and the growth stage of the corn, it may take two passes to achieve 100% control. The benefits of tillage would be not having a plant-back restriction compared to some chemical options that require plant-back restrictions. One disadvantage of tillage would be the impact on the residual herbicide. Pre-emerge herbicides act as a blanket, reducing weed emergence, but tillage can destroy this barrier.
When it comes to managing problematic weeds such as waterhemp, we spend a majority of our time thinking about soybeans but, what is the best way to manage waterhemp in other crops such as corn? When it comes to corn, we rely on many of the same herbicide groups we depend on in soybeans, such as Groups 5 and 15 herbicides. However, one advantage to managing weeds in corn is the ability to use HPPD or Group 27 herbicides. Group 27 herbicides are very effective on waterhemp pre-emerge, as well as post-emergence. Targeting weeds when they are less than four inches is the key to success with Group 27 herbicides, as they will begin to struggle once waterhemp plants become greater than four inches. Therefore, an additional effective SOA may be needed to effectively control larger waterhemp plants.
Tags: corn, Agronomy, Herbicide, weed management
Beck’s Practical Farm Research (PFR)® data suggests 60 lb. to 90 lb./A. of cereal rye can effectively suppress waterhemp compared to the untreated check. In addition to knowing the proper rate to seed cereal rye, we need to determine how to terminate it. Crimping can lay the cover crop down, creating a mat, resulting in effective weed control. The timing and growth of the cereal rye will impact the success of the crimping. For the best results, wait for the cereal rye to head out. If terminated too soon, the crimper will not be successful because the cover crop will recover and continue to grow. Using glyphosate for chemical termination opens the window to earlier applications but will not get the mat of cover as with a crimper. Both methods can be utilized. Spraying the cereal rye and waiting 24 hours to crimp will allow for herbicide uptake to occur before the leaves are damaged with a crimper.
Tags: Agronomy, Herbicide, Cereal Rye, weed management
Cereal rye can help suppress problematic weeds like waterhemp, as well as provide soil health benefits. The question becomes, what is the optimum cereal rye rate to best suppress waterhemp? Beck’s Practical Farm Research (PFR)® conducted studies in 2021 to see what the optimum rate might be. The cereal rye was terminated with crimping or chemical termination the following spring. To evaluate the benefit of a cover crop, no chemical but glyphosate was applied to terminate the cover crop.
Enlist E3® soybeans allow the opportunity to utilize 2,4-D choline, Liberty and glyphosate in-season. With so many options, what is the best tank mix? Liberty is very effective on glyphosate-resistant (GR) weeds such as waterhemp. However, Liberty will be very weak on grasses and Enlist One will have no grass activity. With today herbicide systems with multiple traits we should target our problematic weeds. For instance, the problematic weed in this plot is GR waterhemp. Therefore, we should utlize Enlist One + Liberty to provide two effective SOA’s on this GR waterhemp population. We know we will sacrifice grass control but glyphosate or clethodim can be utilized in a later application to control any grass escapes.
Battling herbicide resistant weeds or weed escapes? Here’s an option of non-chemical weed management to look at! Ben Wiegmann, Beck’s Hybrids Field Sales Agronomist, reviews an alternative form of weed management in soybean systems – the Weed Zapper™. For effective weed control with the Weed Zapper, contact must be made with the main stem of the targeted weed, above the soybean crop canopy. The Weed Zapper electrocutes the targeted weeds to kill them.
Tags: Agronomy, Weed Zapper, herbicide insights
Jonathan Perkins, Beck’s Practical Farm Research (PFR®) Location Lead/PFR Agronomist, discusses post-emergence options for Enlist E3® soybean systems.
Tags: soybeans, Agronomy, herbicide insights
A soil’s pH is the most basic, yet most important value, for determining nutrient availability. Most crops such as corn, soybeans, wheat, and alfalfa prefer a soil pH in a range of 6.3 to 6.8. Soil testing labs will report pH in two ways, soil pH and buffer pH.
Jonathan Perkins, Beck’s Practical Farm Research (PFR®) Location Lead/PFR Agronomist, discusses which rates of clethodim provided the greatest weed control with Enlist One® soybeans in this 2021 Herbicide Insight study.
Tags: Agronomy, herbicide insights
Check out this update with Beck's Hybrids' Field Agronomist, Mike Hannewald, where he talks about stalks and nitrogen deficiency.
Check out this video from Field Agronomist, Mike Hannewald, as he discusses information regarding tar spot and other diseases.
Joe Bolte, Beck’s Hybrids Practical Farm Research (PFR®) Technician & Herbicide Specialist, evaluates different pre-emergent and post-emergent herbicide programs with XtendFlex® soybeans.
Tags: Agronomy, herbicide insights, xtendflex
Tar Spot is a relatively new disease in the US but is one that can cause severe yield loss if conditions are right.
Tags: Beck's Agronomy, Beck's, Corn Disease, tar spot
There are many options available in an Xtendflex® system. Which one will you be utilizing on your operation?
Ben Wiegmann, Beck’s Field Sales Agronomist, reviews the details of the “Weed Management in Wheat” 2021 Herbicide Insight Plot. The purpose of this study is to determine how newer wheat herbicide labels such as Sharpen® and Zidua® SC compare to traditional wheat herbicides.
Tags: Agronomy, Wheat, herbicide insights
Check out this new video with Clayton Stufflebeam, PFR Location Lead, and Joe Bolte, PFR Technician / Herbicide Specialist, for important information regarding the TH Fabrication Row Focus Rotary Hoe.
Categories: Agronomy, S Illinois, Agronomy Talk
Does deep tillage, with a moldboard plow, significantly reduce weed pressure? Austin Scott, Beck’s Hybrids Area Team Leader and Herbicide Specialist, reviews the influence of various tillage practices on waterhemp emergence in this 2021 Herbicide Insight plot.
Ready for those combine wheels to start rolling in the fields? What considerations should a farmer review before revving up for harvest season? Luke Schulte, Beck’s Hybrids Field Sales Agronomist, highlights key agronomic considerations before harvest begins on farms.