Podcasts

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War Against Weeds

Sarah, Joe, and Alyssa are three Extension weed scientists on a mission to help their audience understand what it takes for farmers to fight the war against weeds. This podcast is funded through the North Central Integrated Pest Management Center through support by the Crop Protection and Pest Management Program, project award no. 2022-70006-38001, from the U.S. Department of Agriculture's National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this podcast are those of the presenters and should not be construed to represent any official USDA or U.S. Government determination or policy. You can also find our episodes at https://cropprotectionnetwork.org/.

Latest Episode

S12 E4 - Horseweed/Marestail Management: Cover Crops, Burndown, and Beyond

Marestail has been one of the most troublesome weeds in agronomic crops for more than two decades, and growers are still searching for effective ways to stay ahead of it. In this episode, Dwight Lingenfelter of Penn State joins us to discuss marestail biology, resistance, cover crops, tillage, and the management strategies that can help reduce its impact across soybean, corn, and small grain systems. Sarah mentions a previous episode where we cover marestail research, and that episode is S1 E9 and that can be found here! S1 E9: Marestail/Horseweed Dispersal and Control https://waragainstweeds.libsyn.com/marestailhorseweed-dispersal-and-control

September 30 • 38m 51.7s

Episodes

S12 E4 - Horseweed/Marestail Management: Cover Crops, Burndown, and Beyond

September 30 • 38m 51.7s

S12 E3 - Building Biomass, Battling Weeds: USB Cover Crop Updates

In this episode of War Against Weeds, Joe Ikley and Alyssa Essman welcome Rodrigo Werle to share key insights from eight years of multi-state research on cover crops and weed management. The discussion explores why cereal rye has emerged as the top cover crop for suppressing troublesome weeds like waterhemp and Palmer amaranth, as well as the biomass needed to maximize weed control benefits. They also cover how cover crops fit into an integrated weed management strategy alongside residual herbicides, and what new research could mean for the future of resistance management and sustainable crop production. Resources from our guest: https://badgercropnetwork.com/ https://x.com/WiscWeeds?s=20 Transcript (.docx): https://app.box.com/s/wdpfsjr6di1436t7h014k81t17sgxrs2

September 23 • 50m 46s

S12 E2 - Fall Herbicide Applications

In this episode of War Against Weeds, Tommy Butts is joined by Joe Ikley (North Dakota State University) and Tom Barber (University of Arkansas) to discuss how fall-applied herbicides fit into weed management programs across very different environments. The conversation covers glyphosate-resistant Italian ryegrass, kochia, wild oat, and waterhemp, with a focus on herbicide timing, residual activity, and product selection. They also discuss research findings, farmer adoption of fall programs, and explore how cover crops, crop rotation, and weather impact herbicide performance. Transcript: https://app.box.com/s/odey5jljte1aewvjyrflj1f30365le6y

September 16 • 49m 33.3s

S12 E1 - Revenge Sprays

On our first episode of season 12, Tommy and Alyssa are joined by Dr. Mark VanGessel (University of Delaware) to discuss the effectiveness of late-season herbicide applications on weeds like waterhemp, Palmer amaranth, and burcucumber. They cover weed seed production, harvest concerns, herbicide limitations, resistance management, and the economic realities of spraying large weeds late in the season. Links suggested by our guest: https://www.udel.edu/academics/colleges/canr/cooperative-extension/sustainable-production/weed-science/ https://growiwm.org/ Transcript: https://app.box.com/s/1hejf8whz58xlp2ne0ip0r7hvjne8bgy

September 9 • 43m 21.1s

S12 - New Host Introduction and a Look Ahead

Welcome back to season 12 of the War Against Weeds Podcast! We are so excited to annouce a NEW host this season! Join us as we welcome Dr. Tommy Butts, a weed scientist at Purdue University. We also cover a bit of our summers, and what we are looking forward to this season!

September 4 • 14m 20.2s

S11 E16 - Herbicide Ballistic Technology: Innovation in Invasive Plant Management

In the last episode of season 11, Sarah and Alyssa sit down with Dr. James Leary to explore the innovative world of herbicide ballistic technology. James shares how his work in Hawaii led to the development of herbicide-filled projectiles designed to target invasive plants in hard-to-reach terrain. The conversation dives into the science, logistics, and surprising practicality of "shooting weeds," and how creative thinking can transform invasive species management and conservation efforts. Here are some resources our guest shared! https://www.youtube.com/watch?v=988i6SQKSzY https://www.youtube.com/watch?v=tWYR6C3T3NQ Transcript: PDF: https://app.box.com/s/a2cicz0jpo74m02otm8bjhkmcngjjns7 DOC: https://app.box.com/s/ekzn3mq1jwi0hlq449qz5a49ip7ilmes

May 20 • 36m 12.8s

S11 E15 - Two States, One Challenge: The War on Weeds in Cotton

In this episode of War Against Weeds, the hosts sit down with weed science experts Dr. Peter Dotray (Texas Tech University) and Dr. Stanley Culpepper (University of Georgia) to explore the unique challenges of growing cotton across different regions of the U.S. From starting clean at planting to the critical role of timely herbicide applications and overlapping residuals, they break down what it takes to manage weeds in this slow-growing, high-maintenance crop. Episode Trancript PDF: https://app.box.com/s/up693ucumuokzjoz6su63t43rb72n6io DOC: https://app.box.com/s/2ee7afg6rki1qegpowitnncgs69v1l7e

May 13 • 53m 15.9s

S11 E14 - Hidden Residues: Sprayer Hoses and Herbicide Carryover

This week Joe Ikley and Sarah Ganske are joined by Dr. Tom Mueller (University of Tennessee) to discuss sprayer hose cleanout and herbicide residue risks. The conversation focuses on how hose materials, aging, and system design affect herbicide retention, with research insights comparing dicamba and 2,4-D cleanout challenges. They also share practical recommendations for applicators, including agitation practices, downtime risks, and when hose replacement may be necessary to avoid crop injury. Link: https://utcrops.com/ Transcripts: PDF: https://app.box.com/s/4esrl1zv0dd0za3uojxah0jpwvqdy90i DOC: https://app.box.com/s/frnfuvcvn5t7h6kg11v4cch4jmeigsny

May 6 • 29m 36.8s

S11 E13 - Nozzle Know-How: Balancing Coverage, Deposition, and Drift for Effective Weed Control

In this episode of the War Against Weeds podcast, Alyssa Essman and Sarah Lancaster Ganske are joined by Purdue Extension weed scientist Dr. Tommy Butts for a deep dive into spray nozzles, droplet size, and deposition. The conversation covers how nozzle selection influences coverage, drift, deposition, and weed control, with practical recommendations for ground applications, pulse sprayers, and managing risk in real-world conditions. Epsisode Transcript PDF: https://app.box.com/s/rci0uzr4ww772196tdfeia0vvrdidzas DOC: https://app.box.com/s/398aewwxuygy3rrf3d968e5iyae6vqc4

April 29 • 40m 57s

S11 E12 - Beyond the Silver Bullet: The Social Side of Weed Management

In this episode of the War Against Weeds podcast, Sarah and Joe welcome Dr. Katie Dentzman of Iowa State University to explore the human and social dimensions of herbicide resistance management. The conversation digs into why "silver bullet" solutions are so appealing, the real-world barriers to adopting integrated weed management, and how community dynamics shape decision-making in agriculture. Episode Transcript PDF: https://app.box.com/s/jttzmn1oq5mxq4n629j7ieo16l1muf7p DOC: https://app.box.com/s/ek68ebp2ztqu8lsh7msn82427fvavio8

April 22 • 34m 52.3s

S11 E11 - HRAC 2026 Update: Changes to the Herbicide Modes of Action Poster

In this episode Sarah and Joe welcome Hudson Takano of Corteva Agriscience for an update on the Herbicide Resistance Action Committee (HRAC) and the newly released 2026 HRAC Mode of Action poster. Hudson explains HRAC's role in resistance management, how herbicides are evaluated and classified, and what goes into updating the poster. The conversation highlights newly added herbicides, and why some older or low-use herbicides were removed. The episode also looks ahead to future HRAC work, upcoming herbicides, and where listeners can find the latest HRAC resources online. https://hracglobal.com/tools/2026-hrac-global-herbicide-moa-classification Episode Transcript PDF: https://app.box.com/s/i7fb437reya4ipjf8fbwqagw03jq2c6a DOC: https://app.box.com/s/ur49aaooemdaqlswqfnmu15o5frly1e8

April 15 • 26m 18.9s

S11 E10 - PPO Resistant Kochia: From Field Failures to the Lab

In this episode of the War Against Weeds podcast, Sarah Ganske and Joe Ikley explore the emergence of PPO resistant kochia across the northern Great Plains. Joined by BASF scientists Dr. Ingo Meiners and Dr. Aimone Porri, the group walks through how field failures led to greenhouse confirmation and the discovery of novel PPO target‑site mutations. They discuss why these mutations affect some PPO herbicides but not others and how the findings are already shaping resistance diagnostics and management decisions. They end the episode with practical guidance for growers and a broader look at the importance of collaboration in tackling evolving weed resistance challenges. Transcripts PDF: https://app.box.com/s/619xibmb42kh782frwg7ul8yhmtl289c DOC: https://app.box.com/s/xwwkr88cmm9jc59ihjtqbxvic7f1x5y9

April 8 • 46m 59.2s

S11 E9 - Glufosinate Resistance in Waterhemp: What We Know (and What Comes Next)

In this episode of War Against Weeds, hosts Alyssa and Sarah sit down with Dr. Karla Gage (Southern Illinois University Carbondale) and Dr. Pat Tranel (University of Illinois) to discuss emerging glufosinate resistance in waterhemp and what it means for growers moving forward. Transcripts PDF: https://app.box.com/s/0lyejemx8kyjr8s1fcgca6huqw3qaprp WORD: https://app.box.com/s/la2r3yx4208jm2v8khac9wf8zm5glfab

April 1 • 37m 45.9s

S11 E8 - Drones Update

In this episode of War Against Weeds, Joe Ikley and Alyssa Essman talk with spray technology experts Dr. Tom Wolf and Dr. Jason Deveau about how rapidly spray drones have evolved and why they're challenging to use effectively. They discuss issues like swath variability, droplet behavior, and operator exposure, while also highlighting situations where drones offer clear logistical advantages. The result is a candid, practical look at both the promise and limitations of agricultural spray drones today. Episode Transcript: PDF: https://app.box.com/s/xdhzkf3hazg5jbgrfkcyadfih52mppm3 DOC: https://app.box.com/s/pyl4jbuekymcfmvn62ku0ur5kjenxz9o

March 25 • 54m 38.1s

S11 E7 - Teasel Control with Dr. Reid Smeda

In this episode of War Against Weeds, Sarah and Alyssa sit down with Dr. Reid Smeda of the University of Missouri to dig into the biology, history, and management of invasive teasels. From their origins to their modern spread along roadsides, teasels prove to be more troublesome than their quirky seed heads suggest. Dr. Smeda breaks down why they're so difficult to control and shares long‑term strategies for effective management in rights‑of‑way and beyond. Whether you've seen teasel creeping into your county or just want to stay ahead of emerging noxious weeds, this is a conversation you won't want to miss. Episode Transcripts PDF: https://app.box.com/s/sn8ypb72g1scf0xxvv1zgkb6916t6p77 DOC: https://app.box.com/s/cli6p5ld0vlemyq0m642y2osk049biof Teasel resources https://www.fs.usda.gov/database/feis/plants/forb/dipspp/all.html https://mdc.mo.gov/trees-plants/invasive-plants/common-cut-leaved-teasel-control https://www.purdue.edu/fnr/extension/wp-content/uploads/2025/04/FNR-649TeaselADA-final-comp.pdf https://www.nps.gov/articles/cutleaf-teasel.htm https://www.dnr.state.mn.us/invasives/terrestrialplants/cutleavedteasel.html Bentivegna and Smeda https://doi.org/10.1614/IPSM-D-10-00026.1 https://doi.org/10.1614/WT-08-043.1

March 18 • 28m 38.8s

S11 E6 - Crabgrass Control in Turfgrass

In this episode, Joe and Alyssa talk crabgrass with Purdue's Dr. Aaron Patton and PhD candidate Vera Vuković, covering why smooth crabgrass dominates lawns, how mowing height and fertility can dramatically reduce infestations, and what new research reveals about seed dormancy, germination cues, and emergence timing. They break down practical pre‑ and post‑emergence control strategies—including phenology-based timing and herbicide options—while also touching on emerging issues like quinclorac resistance. https://edustore.purdue.edu/turf-100.html https://turf.purdue.edu/turfgrass-weeds/ Aaron Patton on X: @PurdueTurfDoc Episode Transcripts PDF: https://app.box.com/s/mxdmzk8izjtsben1uin2nq4kyv2b0nz7 DOC: https://app.box.com/s/vimx2nv9cl3vsv3rlaj417pg7uipvrum

March 11 • 47m 6.9s

S11 E5 - Annual Ryegrass

Annual ryegrass is rapidly becoming one of the toughest weeds in U.S. row‑crop agriculture. In this episode, Alyssa Essman (Ohio State) and Joe Ikley (NDSU) talk with Tom Barber (University of Arkansas), Charlie Cahoon (NC State), and Larry Steckel (University of Tennessee) about how this weed is spreading, shifting its emergence timing, and developing resistance to multiple herbicide groups. The guests discuss the strengths and weaknesses of current control options, the importance of fall residuals, and how tactics like tillage, cover crops, and harvest weed‑seed control fit into an integrated approach. They also share ongoing research aimed at better understanding ryegrass biology and improving long‑term management. https://crop-soil-environmental-sciences.uark.edu/people/faculty-directory/uid/ltbarber/name/Tom+Barber/ [crop-soil-...s.uark.edu] https://cals.ncsu.edu/crop-and-soil-sciences/people/cwcahoon/ [cals.ncsu.edu] https://utcrops.com/field-crops-team/ [utcrops.com]

March 4 • 46m 10.3s

S11 E4 - Cheatgrass

In this episode of War Against Weeds, Sarah and Joe sit down with Dr. Jane Mangold of Montana State University to unpack the ecology, spread, and management of cheatgrass and other invasive grasses. Jane explains why species like cheatgrass and ventenata are thriving in the Western U.S., how fire and climate patterns influence their behavior, and what tools land managers can use to stay ahead of infestations. The conversation covers biology, prevention, grazing, herbicide strategies, and new resources available to support rangeland health. https://www.invasivegrasses.com/

February 25 • 52m 9.5s

S11 E3 - WEST (Weed Emergence Scouting Tool)

In this episode of War Against Weeds, hosts Alyssa Essman and Joe Ikley sit down with Melissa Widhalm, Associate Director and Regional Climatologist at the Midwestern Regional Climate Center (MRCC). Melissa introduces WEST — the Weed Emergence Scouting Tool — an experimental, temperature‑based system designed to predict first and peak emergence of key weeds like giant ragweed and waterhemp across the Midwest.

February 18 • 30m 24.5s

S11 E2 - Toxicology 101

In this episode Alyssa Essman and Sarah Lancaster sit down with Washington State University toxicologist Dr. Allan Felsot for a crash course in Toxicology 101. Dr. Felsot breaks down how the EPA evaluates pesticide safety, explains the difference between hazard and risk, and clarifies common misconceptions about chemical exposure, tolerance, and persistence. The conversation also touches on glyphosate, PFAS-related concerns, and why effective science communication—and early education—matter for helping the public understand pesticide technology.

February 11 • 59m 3s

S11 E1 - Broomrape (Orobanche)

Season 11 opens with Dr. Brad Hanson of UC Davis, who joins Joe and Alyssa to unravel the resurgence of broomrape, a challenging parasitic weed threatening California's tomato processing industry. Brad explains how broomrape's underground lifecycle, tiny long-lived seeds, and strict reliance on host plants make it difficult to detect and manage. The episode covers the difference between broomrape species appearing in North America, why processing tomatoes are especially vulnerable, and how broomrape spreads through equipment and soil movement. Here are some sources Dr. Hanson shared for the listeners: UC broomrape page (in progress) https://broomrape.sf.ucdavis.edu/ California Tomato Research Institute's broomrape resource page (mostly UC extension info) https://tomatonet.org/grower-resources/broomrape-resources/ California Department of Food and Agriculture broomrape program page https://www.cdfa.ca.gov/plant/ipc/broomrape/ This is a video article that the UCD college of ag put together a couple years ago https://caes.ucdavis.edu/news/parasitic-weeds-threaten-tomato-plants-california-farms

February 4 • 53m 43.9s

S10 E14 - Looking to the Future

On our last episode of season 10, all three hosts have a discussion on the future of weed science with Dr. Larry Steckel (University of Tennessee) and Dr. Aaron Hager (University of Illinois). They reflect on the evolution of weed management, including the increase of specific weed species, and the challenges of herbicide resistance. Both emphasize the need for integrated approaches, including cover crops, precision technology, and cultural practices.

December 17 • 43m 37.4s

S10 E13 - Weather and Weed Science

Joe Ikley and Sarah Lancaster discuss the North Dakota Agricultural Weather Network (NDAWN) and the Kansas Mesonet with directors Daryl Ritchison and Chip Redmond, respectively. NDAWN, with over 250 stations, provides high-resolution weather data, including soil moisture and temperature measurements. Kansas Mesonet, with 94 stations, focuses on real-time data for agricultural and emergency management purposes. Both networks emphasize the importance of accurate weather data for herbicide application, particularly wind speed, inversions, and delta T measurements. The conversation highlights the critical role of Mesonets in agriculture and emergency response.

December 10 • 59m 38.8s

S10 E12 - Dryland Agriculture Weed Management

Sarah and Alyssa sit down with dryland experts Jeanne Faulk Jones (Kansas State University) and Dr. Drew Lyon (Washington State University). They highlight the challenges of managing weeds in semi-arid regions, including key weeds like Palmer amaranth, Kochia, and perennial grasses. They also discuss various strategies for water conservation and weed management. Smallgrains.wsu.edu Facebook page: K state sunflower district agronomy X: cropswithgenie

December 3 • 1h 6m 41.5s

S10 E11 - Herbicide Resistance Update with Dr. Norsworthy

Dr. Jason Norsworthy from the University of Arkansas sits down with Alyssa and Sarah to discuss the United Soybean Board's weed management project. This project involves screening for resistance to our most used herbicides in our most problematic pigweed species.

November 19 • 43m 42.9s

S10 E10 - Redvine

This week Alyssa and Joe chat with Dr. Jason Bond (Mississippi State University) all about redvine! This week's episode is also a crossover episode with The Mississippi Crop situation Podcast, so check them out here! https://extension.msstate.edu/shows/mississippi-crop-situation

November 12 • 30m 24.5s

S10 E9 - Group 5 Herbicides

Alyssa Essman and Sarah Lancaster sit down with Dr. Aaron Hager (University of Illinois) and Ryan Henry (UPL) to discuss Group 5 herbicides. They cover the historical use and mechanisms of these herbicides, as well as degradation, metribuzin rates, and new herbicides to the market. Paper mentioned in the episode: Optimizing metribuzin rates for herbicide-resistant Amaranthus weed control in soybean link: https://www.cambridge.org/core/journals/weed-technology/article/optimizing-metribuzin-rates-for-herbicideresistant-amaranthus-weed-control-in-soybean/ECF728739388A3DB5BA2290B1105A385

November 5 • 55m 37.3s

S10 E8 - Herbicide Premixtures

Joe & Sarah sit down with Scott Cully and Dean Grossnickle to discuss herbicide premixtures. Scott, a senior field research biology expert, highlights his role in developing products like Acuron and Storen. Dean, a technical development lead, explains his commercial perspective. They detail the development process, including formulation challenges and the importance of proper adjuvant selection. They emphasize the need for accurate application to avoid issues and the benefits of pre-mixtures for ease of use and consistent results.

October 29 • 44m 49.8s

S10 E7 - The HERMON Project

Sarah & Joe sit down with Dr. Eric Patterson from Michigan State University to chat about the The HERMON (Herbicide Resistance Monitoring Network) project. This project aims to create a network of researchers to develop and share new resistance tests and management strategies. The project includes 10 states and focuses on key herbicides like glyphosate, PPO inhibitors, and dicamba. Link mentioned in the episode: https://www.seedworld.com/us/2025/06/19/a-unified-front-on-weed-resistance/

October 22 • 45m 27.9s

S10 E6 - Cytochrome P450s with Dr. Todd Gaines

This week Sarah and Alyssa chat with Dr. Todd Gaines from Colorado State University. They discuss the role of cytochrome P450 enzymes in herbicide metabolism and resistance. Dr. Gaines mentions ongoing research to understand the regulation of these enzymes and the potential for using gene editing to combat resistance. They also touched on the impact of stress on P450 activity and the development of new herbicides. Here is the article mentioned in the episode: https://onlinelibrary.wiley.com/doi/full/10.1002/pld3.70102

October 15 • 53m 9.7s

S10 E5 - Wheat Gene Flow

This week on the War Against Weeds Podcast, Sarah and Alyssa chat with Dr. Allan Fritz, a professor in wheat breeding at Kansas State University! They discuss potential outcrossing between wheat and its wild relatives, particularly jointed goatgrass. The conversation touches on the potential for transgenic wheat and the regulatory challenges posed by consumer acceptance and market concerns. Link from the episode: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://wsweedscience.org/wp-content/uploads/OP5Carol.pdf

October 8 • 29m 9.1s

S10 E4 - Canola

This week Sarah and Joe talk about canola production with Drs. Breanne Tidemann and Mike Cowbrough. They discuss the origins of canola, winter vs spring cultivars, and the challenges associated with growing canola.

October 1 • 54m 38.9s

S10 E3 - Cover Crop Contamination with the Office of Indiana State Chemist

This week Alyssa and Joe chat with Office of the Indiana State Chemist Jessica McVay and Scottie Pouliot about cover crop contamination in seed lots, and all the work they do behind the scenes.

September 24 • 29m 54.8s

S10 E2 - Volunteer Cereals and Green Bridges: A Pathology Perspective

This week Sarah and Joe chat with Drs. Kelsey Andersen Onofre (Kansas State University) and Andrew Friskop (North Dakota State University) about volunteer cereals and green bridges, specifically covering wheat streak mosaic virus. You can find both of our guests here on X: @KSUWheatDisease and @NDSUcerealpath

September 17 • 57m 54.1s

S10 E1 - Combine Settings to Manage Volunteer Corn

Welcome back to the War Against Weeds Podcast for our season 10 premiere! We have Dave Thiessen on today to talk about combine settings during harvest. Dave emphasizes the importance of combine setup, including optimizing corn heads, deck plates, and rotor speeds to minimize harvest losses. They discuss the impact of weather, crop conditions, and machine maintenance including regular power shutdowns to minimize volunteer crops the following season.

September 10 • 46m 30.1s

S9 E15 - (Noxious) Weed Sniffing Dogs

This week we have Ngaio Richards, Amber Burch, and Josh Wagoner on to talk about how the Early Detection, Rapid Response Program in collaboration with the Working Dogs for Conservation utilizes dogs to find noxious weeds. They talk about their work in controlling Dyer's Woad in Montana, as well as other noxious weeds that the dogs are trained to identify. Our guests provided some really great resources for anyone who might be interested, as well as the gear they use for protecting their dogs in the field. https://wd4c.org/ https://outfoxfordogs.com/?srsltid=AfmBOoqp6TYSdqp7PEZGM-vYndGKwt5W1W-PHpExvhYuHjQaHCqhzNoL https://agr.mt.gov/Noxious-Weed-Task-Force-Program#:~:text=The%20Early%20Detection%2C%20Rapid%20Response,of%20efforts%20across%20the%20state

May 7 • 50m 13.8s

S9 E14 - Liberty Ultra Label - ESA

This week on the War Against Weeds Podcast we have two guests on to talk about L-glufosinate. They talk about the Liberty Ultra label and how the ESA (Endangered Species Act) has influenced this new label. Our guests are Liam Vincent a technical marketing manager for BASF, and Lynn Justesen a technical services lead with UPL.

April 30 • 53m 33.8s

S9 E13 - Reconsidering Herbicide Sites of Action

This week we have Dean Riechers from Univeristy of Illinois joining the podcast to talk about herbicide sites of action. Title of mentioned publication: Herbicide resistance is complex: a global review of cross-resistance in weeds within herbicide groups Link our guest wanted to share: https://riecherslab.cropsciences.illinois.edu

April 23 • 35m 40.9s

S9 E12 - Non-GMO Soybean

We are joined by Rodrigo Werle and Andy Bensend this week to talk about Non-GMO Soybeans! A few links our guests wanted to share with listeners: https://unitedsoybean.org/about-the-checkoff/ https://wiscweeds.info/ https://coolbean.info/ https://wisoybean.org/ You can find Rodrigo on X @WiscWeeds

April 16 • 47m 43.6s

S9 E11 - Dichlorprop-P

This week we have Dan Beran and Bob Bruss on to talk about dichlorprop-p. They cover the history and potential future of this active ingredient. Listen now! To find more information about Nufarm go here: https://nufarm.com/uscrop/

April 9 • 37m 10.6s

S9 E10 - Fertilizers as Herbicide Carriers

This week Alyssa and Sarah chat with Caleb Wepprecht and Aaron Hager with University of Illinois about using fertilizers as carriers for herbicide applications.

April 2 • 31m 39.1s

S9 E9 - Potato Production

This week on the War Against Weeds Podcast we have Dr. Andy Robinson on to chat about all things potatoes. He covers weed management, planting, harvesting and where you can find most of our potato production here in the states!

March 26 • 37m 58.4s

S9 E8 - Drones Update

It's a bird... it's a plane... it's drones!! Join us this week as Alyssa and Joe discuss all things drones with Dr. Steve Li. If you or anyone you know is interested in drones for agricultural use, consider attending the 2025 Spray Drone End User Conference. For more info on the conference: https://www.aces.edu/blog/topics/farming/2025-spray-drone-end-user-conference/

March 19 • 41m 56s

S9 E7 - Johnsongrass

This week we have Dr. JD Green on the podcast to cover everything Johnsongrass. He covers the history of Johnsongrass and how to manage it. Available now!

March 12 • 33m 33.7s

S9 E6 - Targeted Tillage

This week we have Dr. Michael Walsh with Charles Sturt University on the podcast to talk about the "weed chipper". The weed chipper is a mechanical weeding implement that could be an answer to herbicide resistant weeds. Listen now to find out how the weed chipper works! To see the weed chipper in action: https://www.youtube.com/watch?v=-1nI6Gh9khI

March 5 • 35m 36.2s

S9 E5 - Henbit

This week Sarah and Joe chat with Dr. Bill Johnson from Purdue University about henbit. They cover why controlling henbit is important and how to manage it in corn and soybean production. Listen now!

February 26 • 26m 13s

S9 E4 - Short Corn

This week our host Sarah and co-host Joe chat with Dr. Erin Burns (Michigan State University) and Dr. Dan Quinn (Purdue University) about short corn. What makes it different from standard corn? What does weed control look like? Listen to find out! Erin's Links: https://www.canr.msu.edu/weeds/ Dan's Links: https://ag.purdue.edu/department/agry/faculty-pages/the-kernel/ X: @PurdueCorn https://www.hoosieragtoday.com/podcast/purdue-crop-chat/

February 19 • 40m 39.7s

S9 E3 - Pasture Weed Management

Welcome back to the War Against Weeds Podcast! This week we are joined by guests Kevin Bradley (University of Missouri) and Dwight Lingenfelter (Penn State University) to discuss weed management in pasture systems. They cover the different weeds found in pastures, non-chemical methods, and the importance of fertility. Kevin's Links: https://weedscience.missouri.edu/ https://www.facebook.com/weedscience.missouri X: @ShowMeWeeds Dwight's Links: General Weed ID references: Weeds of the Northeast (2nd ed. 2023) - great reference >500 weed species with images and descriptions Newcomb's Wildflower Guide (or similar others) Toxic plant databases and info: University of Wisconsin Poisonous Plants of Concern to Wisconsin's Livestock Canadian Poisonous Plants Information System Colorado Guide to Poisonous Plants Cornell Plants Poisonous to Livestock database University of Illinois School of Vet Medicine Poisonous Plants database USDA Poisonous Plant Research Laboratory (Logan, Utah) and ARS Bulletin 415 Plants Poisonous to Livestock in the Western USA

February 12 • 48m 11.6s

S9 E2 - Spray Solution Quality

This week on the War Against Weeds Podcast, we have special guest Dr. Tom Wolf joining us to talk about water quality and its impact on herbicide applications. You can find Tom on X: @nozzle_guy Additional helpful links: https://sprayers101.com/mode-of-action-and-spray-quality/ 2025 ND Weed Guide: https://www.ndsu.edu/agriculture/sites/default/files/2024-12/2025%20ND%20Weed%20Guide%20Final_With%20Color%20Covers.pdf

February 5 • 46m 1.7s

S9 E1 - The IR-4 Project

Welcome back to season 9 of War Against Weeds! We are so excited to be back, and to start our season off with Roger Batts to discuss his work with the IR-4 Project. Learn about what IR-4 is and what services it provides for farmers across the United States.

January 29 • 49m 44.7s

S8 E15 - Weed Management Economics

For our final episode of season 8, we have agronomists Kyle Okke, Jason Hanson and Jeff Nagel on to discuss the economics of weed control for growers. They cover their major weed challenges and how additional inputs like machinery cost, fertility, and pest management are all factored into planning for '25. Let's wrap up this season by reflecting on '24, and looking into '25! You can find Jason and Kyle on X at: @rocknrollagrnmy and @okkefromuskogee And find their podcast Agronomists Happy Hour at https://agronomistshappyhour.com/ And on X @AgHappyHour You can find more information about Keystone Cooperative here: https://www.keystonecoop.com/ Thank you all for another great season!

December 18 • 1h 17.7s

S8 E14 - Novel Genetic Methods for Pigweed Control

Dr. Todd Gaines with Colorado State University joins us this week to talk about some novel genetic methods to control weeds! He covers the genomic timeline and how things have changed through the years, and how genomics helps understand herbicide resistance by identifying target site genes and mutations. Some links that Dr. Gaines wanted to share: https://www.weedgenomics.org/ https://link.springer.com/article/10.1186/s13059-024-03274-y https://www.ingentaconnect.com/content/resinf/opm/2024/00000035/00000004/art00002

December 11 • 50m 50.7s

S8 E13 - Herbicide Supply Chain

Welcome back to the War Against Weeds Podcast! This week we are joined by guests Jeremy Safranski (Director of Strategic Planning at CHS Inc.) and Mike Bjertness (Management at C-W Valley Co-op) to discuss the herbicide supply chain and their experiences in the United States. You can find these two guests here: https://www.linkedin.com/in/mike-bjertness-cca-0b404326a/ https://www.linkedin.com/in/jeremy-safranski0312/ And the links they provided for more information: www.cwvalley.com www.chsinc.com

December 4 • 37m 2.2s

S8 E12 - Herbicide Discovery Process

This week on the War Against Weeds Podcast, we have special guests Drs. Cara McCauley and Jason Adams on to chat about the herbicide discovery process. They cover the many things involved in creating new chemistries for farmers to use in the war against weeds! If you want to reach out to either of our guests, you can find them here: https://www.linkedin.com/in/cara-mccauley/ https://www.linkedin.com/in/jason-adams-6b356322b/ Thanks for listening!

November 20 • 55m 48.4s

S8 E11 - Enhanced Degradation of Triazine Herbicides

This week on the War Against Weeds Podcast, we have Drs. Dale Shaner and Tom Mueller joining us to discuss enhanced degradation of triazine herbicides! You can find more information on this topic at these links below provided by our guests. https://utia.tennessee.edu/publications/wp-content/uploads/sites/269/2023/10/PB1580.pdf https://utcrops.com/ https://scijournals.onlinelibrary.wiley.com/doi/abs/10.1002/ps.1909 Thanks for listening!

November 13 • 43m 49.5s

S8 E10 - Palmer Amaranth Update from Tennessee

This week Joe and Alyssa chat with Larry Steckel from the University of Tennessee! We are partnered with Crop Protection Network (CPN), so check out their page for more great information, and thanks to our sponsor North Central IPM Center for their support!

November 6 • 36m 16.2s

S8 E9 - Pumpkins

This week we are talking pumpkins! Dr. Marty Williams and Dr. Alan Walters chat with Sarah and Alyssa about pumpkin production in Illinois. Jack-o'-lanterns, processing pumpkins, and gigantic pumpkins oh my! You can find more information about our guests at: www.martywilliamslab.com and https://academics.siu.edu/agriculture/horticulture/faculty/walters-alan.php Marty's Reference Table: Table E-4 shows crop rotation planting restrictions for a long list of herbicides. (Click on link below!) https://extension.umd.edu/sites/extension.umd.edu/files/2022-01/2022-2023%20Vegetable%20Production%20Recommendations.pdf

October 30 • 48m 42.7s

S8 E8 - Laser Weeding

This week on the War Against Weeds Podcast, Sarah and Joe chat with Lynn Sosnoskie (Cornell University) and Thierry Besançon (Rutgers University) about LASER WEEDING! Some highlights from the episode include how these machines work, their utility in different cropping systems, and how this could change weed control in the future! Lynn can be found on X @LynnSosnoskie and Instagram @specialtycropweedscience Thierry can also be found on Instagram @thierrybesancon For more information about Carbon Robotics you can find them here: https://carbonrobotics.com/ Thank you for listening!

October 23 • 55m 7.6s

S8 E7 - Witchweed

Witchweed! This spooky parasitic weed is the topic of this week's episode. Alyssa and Joe chat about witchweed's biology, history and economic impact with Dr. Bridget Lassiter and Dr. David Nelson! You can find more information about Dr. Nelson at https://nelsonlab.ucr.edu/, and here are some additional links that our guests mentioned in the episode. https://www.toothpickproject.org/ https://promise.nioo.knaw.nl/en https://academic.oup.com/plphys/article/185/4/1292/6041598 www.invasiveplantcontrol.com/wp-content/uploads/2018/04/roberteplee.pdf

October 16 • 51m 11s

S8 E6 - Desiccation

This week's topic is desiccation! Joe and Sarah discuss fall desiccants in various bean crops with Dr. Shawn Conley (University of Wisconsin-Madison) and Dr. Jeremy Ross (University of Arkansas)! You can find them both on X and their university websites! X: @badgerbean www.coolbean.info X: @.arksoydoc www.Uaex.uada.edu

October 9 • 55m 14.8s

S8 E5 - Wild Oat

This week our host Joe Ikley and co-host Sarah Lancaster discuss everything "Wild Oat" with guests Kirk Howatt and Breanne Tidemann. They cover biology, spread, and management of wild oat in North Dakota and various parts of Canada. You can find Breanne on Instagram @lacombweedsci, and on X @breanntidemann. More info on the wild oat action committee can be found here: https://weedscience.ca/wild-oat-action-committee/ Kirk can be found at NDSU's website, and more information about wild oat in North Dakota can be found here: https://www.ag.ndsu.edu/weeds/nd-weed-control-research

October 2 • 58m 46s

S8 E4 - Burcucumber

This week our host Alyssa Essman and co-host Joe Ikley chat with Dr. Dwight Lingenfelter from Penn State University about burcucumber. They discuss seed characteristics, where it's problematic for farmers, and how to control it. We are partnered with Crop Protection Network (CPN), so check out their page for more great information, and thanks to our sponsor North Central IPM Center for their support!

September 25 • 44m 8.5s

S8 E3 - EPA ESA Update

This week our host Sarah Lancaster and co-host Alyssa Essman discuss the final version of the herbicide strategy plan in accordance with the Endangered Species Act (ESA). They are joined by special guests Bill Chism and Ashlea Frank to chat about the timeline for implementation of these strategies, and what this means for farmers and applicators in the years to come. A few helpful links our guests provided for any questions regarding the ESA. https://www.epa.gov/endangered-species https://www.Festf.org https://wssa.net/endangered-species/ We are partnered with Crop Protection Network (CPN), so check out their page for more great information, and thanks to our sponsor North Central IPM Center for their support!

September 18 • 59m 32.5s

S8 E2 - Cover Crop Trade-Offs

This week our host Alyssa Essman and co-host Sarah Lancaster chat with Logan Simon (Kansas State University) and Travis Legleiter (University of Kentucky) about cover crops. They cover the trade-offs of having cover crops in their states, and their most commonly asked questions by farmers. Our guests can be found on X @SWKSAgronomy and @TravisLegleiter More information about their universities and programs can be found here: https://weedscience.ca.uky.edu/ https://www.wkrec.org/

September 12 • 56m 53.9s

S8 E1 - 2024 Summer Recap

WELCOME BACK to season 8 of the War Against Weeds Podcast! Our first episode of the season we have three special guests on to recap their summers. The whole team chats with guests Kody Came (Kansas), Austin Sundeen (North Dakota), and Greg McGlinch (Ohio) about the wins, losses, and lessons learned from the summer of 2024.

September 4 • 53m 2s

S7 E15 - Weed Control in Mint

Our last topic for the season is weed control in MINT! Our guests this week are Dr. Stephen Meyers with Purdue University, and Dr. Pete Berry with Oregon State University. They chat about the challenges in growing mint, and share some other interesting facts about growing this specialty crop! Dr. Stephen Meyers and his lab can be found at the links below: https://www.purdue.edu/hla/sites/hla-happenings/article-tags/dr-stephen-meyers-lab/ https://twitter.com/stephenlmeyers Dr. Pete Berry can be found at this link: https://cropandsoil.oregonstate.edu/users/pete-berry

April 24 • 41m 56.4s

S7 E14 - A Canadian Perspective on Harvest Weed Seed Control

Welcome Back to the War Against Weeds Podcast! This week Joe and Sarah discuss harvest weed seed control with Breanne Tidemann. Breanne is a research scientist with Agriculture and Agri-Food Canada with her focus on weed management and field agronomy. Listen in to learn all about harvest weed seed control up in Canada!

April 17 • 47m 1.6s

S7 E13 - A Conversation Between Plants

Join us this week as Joe and Sarah chat with Dr. Clarence Swanton with the University of Guelph, while he delves into the intricacies of plant growth!

April 10 • 51m 36s

S7 E12 - Herbicide Carry Over with Kevin Bradley

This weeks topic is carry over! Sarah and Alyssa chat with guest host Kevin Bradly from the University of Missouri about herbicide carry over.

April 3 • 35m 47.4s

S7 E11 - Crop Injury with Bryan Young

This week Sarah and Joe chat with Bryan Young from Purdue University about crop injury!

March 27 • 50m 1.5s

S7 E10 - Interseeding

This week our topic is interseeding! What is interseeding? How is it used, and how can it be beneficial for growers? Find out in this episode! Alyssa and Joe chat with Dr. Karla Gage with Southern Illinois University about her work with interseeding across the country.

March 20 • 37m 16.4s

S7 E9 - Weed Control Failures

This week on the War Against Weeds Podcast Alyssa and Sarah discuss weed control failures with Dr. Peter Sikkema (@psikkema1) who recently retired from the University of Guelph. Thanks to our friends and sponsors @CropNetwork and @ncipmc for their support! Check out their pages for more great info!

March 13 • 39m 38s

S7 E8 - Broadleaf Weeds in Rangelands

This week Joe and Alyssa are joined by Dr. Brian Mealor from the University of Wyoming with another exciting episode about weed control in rangelands. This week they talk specifically about broadleaf weeds including leafy spurge, yellow toadflax, purple loosestrife and many many others. Interested in a summer internship in Wyoming? Check out our social media to see a flyer with more information. Other links mentioned in the episode: https://www.invasivegrasses.com/ https://www.uwyo.edu/plantsciences/department-directory/mealor-brian.html

March 6 • 52m 36.4s

S7 E7 - Poison Hemlock

Alyssa and Joe chat with Bill Johnson from Purdue University about poison hemlock, and other plants from the parsley family.

February 28 • 23m 37.9s

S7 E6 - Herbicide Burndown in No-Till

This week on the War Against Weeds Podcast Joe and Sarah chat with Tommy Butts about herbicide burndowns in no-till fields. An Arkansas, Kansas, and North Dakota perspective on burning down weeds prior to or after planting. Some links Tommy mentioned in the episode: https://www.uaex.uada.edu/farm-ranch/pest-management/weed/default.aspx https://ag.purdue.edu/btny/purdueweedscience/ Tommy Butts on Twitter/X: @weedsARwild

February 21 • 46m 6.6s

S7 E5 - What's in a Formulation?

Sarah and Alyssa chat with Dustyn Sawall about herbicide formulations. Dustyn works as a principle chemist for Winfield United and really gets "into the weeds" about the behind the scenes work and ideas that go into formulating the herbicides that make it to the market.

February 14 • 29m 0.3s

S7 E4 - What About Safeners?

Sarah and Joe chat with Dr. Dean Riechers from Univeristy of Illinois about safeners. What they are, how they are used and potential future uses!

February 7 • 41m 52.2s

S7 E3 - Isomers

This week's topic is ~isomers~ Join Sarah and Alyssa as they sit down with Mark Kitt, a Technical Product Lead with Syngenta to chat about herbicide formulations.

January 31 • 28m 7.3s

S7 E2 - The Silver Bullet That Wasn't

This week on the War Against Weeds Podcast Alyssa and Joe chat with Marty Williams and Christopher Landau about glyphosate resistance in North America. The Silver Bullet That Wasn't: Rapid Agronomic Weed Adaptations to glyphosate in North America Here is a link to the article: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10697415/

January 24 • 34m 31.9s

S7 E1 - Rewind and Fast Forward on the Farm

We are BACK with our first episode of season 7! This week all three hosts chat with 3 farmers from the Midwest about their weed management programs and experiences. Our guests include Mike Langseth from North Dakota, Rick Clifton from Ohio, and Scott Gigstad from Kansas.

January 17 • 39m 37.5s