New Chemistry to Improve Marestail Control & Protect Yields

Transcription

1 New Chemistry to Improve Marestail Control & Protect Yields Experience Exchange Panel Participant s Sponsored by: Corteva Agriscience, Agriculture Division of DowDuPont Note: If disconnected, call Beck Ag, Inc.

2 MODERATOR Krista Rose Krista has a bachelor s degree in horticulture from The Pennsylvania State University. She spent 10 years with Ciba-Geigy and Novartis as a Sales Manager, Training Specialist and Sales Representative in the Northeast and Midwest. In addition, she and her husband have owned and managed a cow-calf operation since Krista joined Beck Ag in 1999 and has moderated and managed agricultural projects across a wide variety of crops and disciplines, including livestock. She is also a writer with Beck Ag, and is a key lead for the Market Instruction initiatives. 2

3 PANEL Bryan Young, Ph.D. Professor, Botany and Plant Pathology Department Purdue University Kristin Rosenbaum, Ph.D. Integrated Field Scientist Corteva Agriscience, Agriculture Division of DowDuPont Jeff Ellis, Ph.D. Market Development Specialist for MO and Eastern KS Corteva Agriscience, Agriculture Division of DowDuPont Retailers with experience will also join the panel 3

4 TO JOIN THE DISCUSSION 1. Go to Joinwebinar.com 2. Type in the 9 digit ID and your address To ask questions during the discussion: Press Star 1 on your touchtone phone and the operator will open your line so you can ask your question directly to the panelists. For webinar participants: Type in a question online and the moderator will present your question to the panelists. 4

5 MARESTAIL, aka HORSEWEED Uncontrolled, reduces soybean yield by 83 percent Produces 200,000 seeds/plant 80 percent of seeds can germinate right off the plant and are easily spread by wind No-till, lack of crop diversity and herbicide resistance contribute to the spread Lifecycle: - Overwinters in rosette stage, followed by stem elongation in late spring - Additional flushes germinate in spring - Can grow to height of 6 feet Extended emergence period complicates control: - Various weed sizes - Most easily controlled in seedling or rosette stage - Fall-emerged weeds are often too large to control at planting - Fall emerged plants will start stem elongation earlier than spring-emerged plants Agronomy Insider. Weed Madness. Successful Farming, Meredith Corporation, 21 July Loux, Mark, and Bill Johnson. Control of Marestail in No-till Soybeans. Control of Marestail in No-till Soybeans, Purdue University Extension and Ohio State University Extension,

6 MARESTAIL LIFE CYCLE Ideal size for easy control Loux, Mark, et al. Biology and Management of Horseweed. Biology and Management of Horseweed, Purdue University,

7 TARGETING PROBLEM WEEDS IN THE FALL Marestail Common Chickweed Photo courtesy University of Missouri Cutleaf Evening Primrose Marestail (rosette) Photo courtesy Purdue University Marestail Photo courtesy Purdue University Henbit and Purple Deadnettle Common Lambsquarters Source: Corteva Agriscience 7

8 TIPS FOR MARESTAIL CONTROL Rotate crops Use spring, pre-plant tillage since marestail does not easily survive tillage Use multiple burn-down applications both fall and spring treatments Use full rates of residual herbicides in the spring Do not rely on glyphosate or 2,4-D alone Plant cover crops Managing Glyphosate-Resistant Marestail. United Soybean Board, United Soybean Board, 10 June Agronomy Insider. Weed Madness. Successful Farming, Meredith Corporation, 21 July Photo courtesy BigAg.com 8

9 ELEVORE HERBICIDE ARYLEX ACTIVE New active ingredient Mode of Action: growth regulator Site of Action: Group 4 Prevents regrowth of emerged weeds for clean fields at planting Tank-mix compatible with commonly used burndown New resistance management tool for ALS and glyphosate resistant weeds Superior control of marestail, up to 8 tall Low use rate of 1 oz./a Excellent fit in reduced and no-till production systems Labeled for use in soybean, corn and cotton Chemical Family Arylpicolinates Active Ingredient Arylex Active Mode of Action Growth Regulator Site of Action Group 4 9

10 HOW ARYLEX ACTIVE WORKS Arylex Active is rapidly absorbed into the plant s cells Mimics naturally occurring hormones by binding with specific auxin receptors in the cells nucleus Affinity to bind with specific receptors differentiates it from other synthetic auxin herbicides Competition Elevore herbicide 10

11 WEEDS CONTROLLED OR SUPPRESSED BY ELEVORE HERBICIDE Common Name Catchweed bedstraw Controlled 4 Chickweed, common Controlled 4 Flax, volunteer Controlled 4 Fumitory Controlled 4 Hempnettle, common Controlled 4 Henbit Controlled 4 Horseweed (marestail) 1 Controlled 8 Lambsquarter, common Controlled 4 Pigweed, redroot Controlled 4 Ragweed, common Controlled 4 Vetch, hairy Controlled 4 Maximum Height 1 For best results apply before bolting. 2 Suppression is expressed as a reduction in weed competition (reduced population or vigor) as compared to untreated areas. The degree of weed control and duration of effect may vary with weed size, density, application rate, coverage and growing conditions before, during and after treatment. Common Name Bindweed, field Supression 2 4 Buckwheat, wild Supression 2 4 Geranium, Carolina Supression 2 4 Kochia Supression 2 4 Lettuce, prickly Supression 2 4 Pennycress, field 1 Supression 2 4 Sheperdspurse 1 Supression 2 4 Sowthistle, annual 1 Supression 2 4 Sunflower, common Supression 2 4 Thistle, Canada Supression 2 4 Maximum Height 11

12 ELEVORE HERBICIDE = COMPLETE CONTROL OF MARESTAIL Sterling, NE Trial: 4 Weeks After Application Glyphosate Resistant Marestail (Conyza canadensis) Burndown Control with Elevore Evaluations made four weeks after application, Untreated Glyphosate 32 oz. Elevore 1 oz. + Glyphosate 32 oz. Glyphosate 2,4-D + Glyphosate Elevore + Glyphosate Elevore + Glyphosate + 2,4-D Elevore + Glyphosate + FirstRate Elevore + Sonic + Glyphosate Elevore + Surveil + Glyphosate % Visual Control 12

13 ELEVORE BURNDOWN PERFORMANCE Untreated Glyphosate 10 GPA (Ground): 0% Elevore herbicide + glyphosate 10 GPA (Ground): 95% 6WAA Elevore herbicide + glyphosate 10 GPA (Air): 95% 6WAA 13

14 ELEVORE DELIVERS ELEVATED BURNDOWN Untreated Elevore herbicide + glyphosate 5 gpa (air): 90% 6WAA Sharpen + glyphosate 5 gpa (air): 50% 6WAA 14

15 ELEVORE HERBICIDE USE AND APPLICATION GUIDELINES Production Systems For use in burndown in reduced and no-till production systems, prior to planting soybeans, corn and cotton Crops Labeled for use in: Soybean, corn (including field, popcorn, sweetcorn) and cotton Rates 1.0 fl oz product/acre Use a Crop Oil Concentrate (COC) or Methylated Seed Oil (MSO) Can be tank-mixed with other burndown and residual tank-mix partners Application Timing Spring or fall burndown application Apply at least 14 days prior to planting corn and soybean; 30 days prior to planting cotton Application Method Ground or air Apply to actively growing weeds Rainfast after 1 hour 15

16 SUMMARY Elevore herbicide is the latest innovation for fall and spring burndown. New Arylex Active works systemically to kill weeds from the inside out, delivering more thorough control and preventing regrowth. Elevore controls troublesome postharvest weeds, including marestail up to 8 inches tall and other ALS- and glyphosate-resistant species. More effective burndown in the fall means streamlined workload in the spring, betterprepared fields at planting and the opportunity for increased yield at harvest. Elevore is a low-use rate product that easily tank-mixes with commonly used burndown and residual partners. I went to the field every day after application and, the first three days, I began to question if anything was going to happen. Nothing had really changed in the appearance of the weeds. When I went over on the next day, the weeds were completely wilted. The appearance had changed drastically overnight. Elevore had smoked everything in its path. Agronomist Levi Lehmkuhl, Hiawatha, Kansas 16

17 ElevateYourBurndown.com For More Information Corteva Agriscience is the agriculture division of DowDuPont. Our purpose is to enrich the lives of those who produce and those who consume, ensuring progress for generations to come. Contact your local Corteva Sales Representative Trademarks of Dow AgroSciences, DuPont or Pioneer and their affiliated companies or respective owners. Arylex is a registered active ingredient. Elevore is not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. All other trademarks are the property of their respective owners. 17