Kevin Bradley
University of Missouri
Weeds, Weed Science, University of Missouri, Herbicide Resistance, Crop Management, Integrated Pest Management
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Articles by Kevin Bradley
GUEST COLUMN - West Plains Daily Quill
Posted 3/6/26 Missouri farmers are operating in one of the most innovation-rich periods in agricultural history. This item is available in full to subscribers. E-mail Password Print and web subscribers If you're a print and web subscriber, but do not yet have an online account, click here to create one. Non-subscribers Click here to see your options for becoming a subscriber.
Fighting with Robots: The Time to Prepare is Now
On December 20, 2024, Ukraine’s successfully conducted an “all-robot” ground and air attack, with dozens of drones in the air and unmanned ground platforms coordinated in an assault against a Russian position in Kharkiv oblast. The remarkable achievement highlighted the rapid integration of robotic systems into current military formations. Human-machine integrated formations are no longer speculative concepts—they are operational necessities.
New Weed Resistance
By James Hoorman, Hoorman Soil Health Services, and Kevin Bradley, University of Missouri Farmer have a new type of weed resistance to worry about. Farmers have been using herbicide or chemical weed control for many years. Weeds have learned several ways to get around herbicides in order to survive. While it is recommended that farmers rotate different groups of herbicides and use full rates, sometimes that does not happen and weeds become herbicide resistant.
Mizzou Pest Management Field Day Set for July 6th
By Kevin Bradley The annual Mizzou Pest Management Field Day will be Thursday July 6th at the Bradford Research and Extension Center, approximately 8 miles east of Columbia, Missouri. Registration will begin at 8:00 a.m. with opening comments by Dr. Bradley at 8:30. The morning will include guided wagon tours with stops that include presentations of research results by university scientists including state extension plant pathologist Dr. Mandy Bish and extension soybean agronomist Dr. Andre Reis.
Weeds adapt to fight back against herbicides
COLUMBIA, Mo. – Weeds today aren’t like “what Mom used to make,” says University of Missouri Extension weed scientist Kevin Bradley. Today’s weeds know how to fight back against long-used herbicides and adapt in ways that spell trouble in production agriculture, says Bradley. Officially, Missouri already has 11 different herbicide-resistant weed species. Waterhemp and Palmer amaranth, both weeds in the pigweed family, rule the roost when it comes to resistant weeds in Missouri, he says.
Forage, Feed And Grazing Restrictions For Some Common Corn And Soybean Herbicides
Farms.com Home › News By Kevin Bradley With the drought we are currently experiencing in much of central and southern Missouri, many farmers are starting to consider using at least some portion of their corn and soybean crop for livestock feeding purposes. Before making this decision, one of the most important considerations is the forage and feeding restrictions of the herbicides that have already been sprayed for weed control in these fields.
The Impact of Electrocution Treatments on Weed Control and Weed Seed Viability in Soybean
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Missouri: New Dicamba Label Requirements
With the recent EU approval of Xtendflex soybean, commercial launch will begin in 2021. In addition, the US EPA has registered 3 dicamba products (Xtendimax, Engenia, Tavium) for use through 2025. The new labels have a few new requirements. Here is a brief overview of what’s new: Only labeled for use in Xtend and XtendFlex crops.
A short- and long-term crash course to re-enter your building
If your car were sitting out on the street, unused, for 12 months would you trust it to be ready for your next road trip? Probably not - you'd expect the battery to be dead, that it might need an oil change, or at the very least you'd need a fresh tank of gas. This is now the reality many buildings are facing. The Washington area's direct vacancy rate, excluding owner-occupied buildings, rose to 17.2% during the second quarter, leaving buildings unoccupied and unused.
Off-target pesticide movement: a review of our current understanding of drift due to inversions and secondary movement
Introduction Pesticide movement from intended targets onto unintended targets has been a concern as long as pesticides have been applied. The first report recognizing pesticides as air pollutants occurred in 1946 (Daines Reference Daines and McCabe1952).
AppleTV showcasing VPN feature via jailbroken tvOS
AppleTV showcasing VPN feature via jailbroken tvOS By: Kevin Bradley @nitoTV While recently working on a new feature for Guardian Pro users, I had an epiphany moment that I could not pass up taking a moment to explore. The feature would grant the ability to generate extra VPN authentication credentials and share mobileconfig files from the iOS application (Guardian Firewall) to other platforms such as macOS. Of course, it got me thinking, why can’t this work on tvOS?
Dicamba Losses to Air after Applications to Soybean under Stable and Nonstable Atmospheric Conditions
Abstract Challenges to control broadleaf weeds in broadleaf crops prompted development of soybean [Glycine max (L.) Merr.] and cotton (Gossypium hirsutum L.) with dicamba resistance. As a result of an unprecedented number of dicamba‐related injury cases in the United States, the movement of dicamba was studied in an applied research setting. High‐volume air samplers were used to determine concentrations of dicamba in air after treatment to soybean.
Fall Management Strategies for Optimizing the Control of Horseweed
By Eric Oseland and Kevin Bradley Horseweed is one of the most troublesome weeds we encounter in corn and soybean fields in Missouri, and is especially common in no-till environments. In a recent survey of Missouri horseweed populations, we found that widespread glyphosate (group 9) and ALS (Group 2) herbicide resistance exists in horseweed populations throughout the state (see survey results here).
Missouri Corn, Soybeans: Fall Management Strategies for Horseweed
Horseweed, or marestail, is one of the most troublesome weeds we encounter in corn and soybean fields in Missouri, and is especially common in no-till environments. In a recent survey of Missouri horseweed populations, we found that widespread glyphosate (group 9) and ALS (Group 2) herbicide resistance exists in horseweed populations throughout the state (see survey results here).
Missouri weed authority talks dicamba ruling
TO APPLY OR NOT APPLY: Authorities are waiting on EPA for an answer, but Kevin Bradley, University of Missouri weed scientist offers his take on the court ruling.
Ashton Kutcher & Craig Jones Got To Roll Together & Here's The Video
Since he got his brown belt last October, many have questioned if movie star and all-around cool dude Ashton Kutcher could really roll. No footage of him in practice had ever surfaced, and rumors of a purposefully low intensity training program from Rigan Machado left doubts in the air. Well, this video of Kutcher rolling with BJJ legend Craig Jones should put those worries to rest.
Mizzou Weed Science: An Update on Resources Available to You
By Mandy D. Bish, Kevin Bradley It has been a while since we have shared links to available weed science resources. Recently, we have summarized many of our 2019 field trials and they are now available online.
Journal of Environmental Quality Abstract - Atmospheric Pollutants and Trace Gases Dicamba Losses to Air after Applications to Soybean under Stable and Nonstable Atmospheric Conditions | Digital Library
doi: 10.2134/jeq2019.05.0197 Mandy D. Bish *a, Shea T. Farrella, Robert N. Lerchb and Kevin W. Bradleya a Division of Plant Sciences, Univ. of Missouri, 108 Waters Hall, Columbia, MO 65211 b USDA-ARS, Cropping Systems and Water Quality Research Unit, Columbia, MO 65211 Core Ideas: The highest dicamba detections were associated with stable atmospheric conditions. Addition of glyphosate to dicamba increased dicamba losses to air.
Journal of Environmental Quality - Atmospheric Pollutants and Trace Gases Dicamba Losses to Air after Applications to Soybean under Stable and Nonstable Atmospheric Conditions | Digital Library
Abstract Challenges to control broadleaf weeds in broadleaf crops prompted development of soybean [Glycine max (L.) Merr.] and cotton (Gossypium hirsutum L.) with dicamba resistance. As a result of an unprecedented number of dicamba-related injury cases in the United States, the movement of dicamba was studied in an applied research setting. High-volume air samplers were used to determine concentrations of dicamba in air after treatment to soybean.
Opinion: Can voluntary schemes deliver meaningful outcomes for environment?
The European Union has launched a number of plans to help reduce our material and energy footprint, from CO2 emissions reduction plans to its Circular Economy Package. A key challenge for the industry is how to integrate these goals within their current operational contexts and future investment plans whilst at the same time maintaining competitiveness and delivering value to society. In this context, is there still a role for voluntary product stewardship schemes?
Missouri: 5 Weed Management Issues from Flooding, Wet Conditions
Obviously, our season so far has been one for the books. Our state climatologist Pat Guinan tells us that last month was the wettest May on record ever! We’ve been fielding a number of questions over the past several weeks related to the wet weather and how this affects our herbicides and weed management practices. In this article, we present a few brief thoughts that provide some answers to the most common questions we’ve been getting. 1. Killing out failed corn stands.
Five things we've learned about dicamba
As we prepare for another year with the Xtend soybean system, we thought it would help to briefly summarize some of the most important things we've learned about dicamba as a result of research our outstanding graduate students have conducted during the past several seasons. 1. Dicamba can be detected in the air following treatment. This isn't really any grand new finding; we've seen this trend in graduate student Shea Farrell's research for the past two seasons.
Dicamba and Temperature Inversions: Lessons Learned from 4 Years of Research
By Mandy D. Bish and Kevin Bradley, University of Missouri, Division of Plant Sciences The University of Missouri is beginning its fifth year of monitoring inversions in Missouri. In 2017 they started expanding our inversion monitoring network and also began studying how inversions affect dicamba applications thanks to partnerships with colleagues at other states and funding from the United Soybean Board, Missouri Soybean Merchandising Council, and the U.S. Dept. of Agriculture.
Dicamba - 5 Things We've Learned - AgFax Weed Solutions
As we prepare for another year with the Xtend soybean and cotton system, we thought it would help to briefly summarize some of the most important things we’ve learned about dicamba as a result of the research our outstanding graduate students have conducted over the past several seasons. 1. Dicamba Can be Detected in the Air Following Treatment. This isn’t really any grand “new” finding; we’ve seen this trend in graduate student Shea Farrell’s research for the past two seasons.
Inversions And Herbicide Movement: 7 Things Learned In 4 Years Of Research
We are beginning our fifth year of monitoring inversions in Missouri. In 2017 we started expanding our inversion monitoring network and also began studying how inversions affect dicamba applications – thanks to partnerships with colleagues at other states and funding from the United Soybean Board, Missouri Soybean Merchandising Council and USDA.
The importance of Bromine in reducing Mercury emissions
There are three main reasons why we need to reduce mercury emissions. Firstly, it’s among the top ten chemicals of concern. Secondly, human activities are by far the largest source of mercury to the environment. And thirdly, in 2013, the global community committed to reducing mercury emissions via the Minamata Convention. Thanks to it’s unique physical and chemical properties, bromine reacts with elemental mercury which is coming out of the stacks of coal-fired power stations.
July 15 Dicamba injury update. Different Year, same questions
As explained in previous articles from this season (Dicamba Injury Mostly Confined to Specialty Crops, Ornamentals and Trees so Far, Dicamba Injured Crops and Plants Becoming more Evident: June 15th Update), I have attempted to provide updates as to the extent of dicamba injury throughout the United States, either in the form of official dicamba-related cases that are currently under investigation by the state Departments of Agriculture, or as estimates of dicamba-injured soybean acreage from...
Dicamba Injury Update - Different Year, Same Questions
Cupping of young trifoliolate leaves following exposure to dicamba. As explained in previous articles from this season, I have attempted to provide updates as to the extent of dicamba injury throughout the United States, either in the form of official dicamba-related cases that are currently under investigation by the state Departments of Agriculture, or as estimates of dicamba-injured soybean acreage from university weed scientists.
"Recovery" Treatments for Dicamba-injured Soybean. Results from a 2017 Experiment
Once dicamba injury has occurred to non-Xtend soybean, one of the common questions that will inevitably arise is, "can anything be done now to help the plants recover?" Last year we conducted one field research trial to address this question. In this research, we intentionally injured soybean with a 1/100X rate of dicamba at either the V3 or R2 stages of growth (black and gold bars, respectively, in Figure 1).
Dicamba Injury: Can Soybeans Recover? Missouri Researchers are Working on it.
Once dicamba injury has occurred to non-Xtend soybean, one of the common questions that will inevitably arise is, “can anything be done now to help the plants recover?” Last year we conducted one field research trial to address this question. In this research, we intentionally injured soybean with a 1/100X rate of dicamba at either the V3 or R2 stages of growth (black and gold bars, respectively, in Figure 1).
"Recovery" Treatments for Dicamba-injured Soybean. Results from a 2017 Experiment.
Once dicamba injury has occurred to non-Xtend soybean, one of the common questions that will inevitably arise is, "can anything be done now to help the plants recover?" Last year we conducted one field research trial to address this question. In this research, we intentionally injured soybean with a 1/100X rate of dicamba at either the V3 or R2 stages of growth (black and gold bars, respectively, in Figure 1).
Dicamba Injury Reports, 2018: Drift Issues Becoming More Evident
A couple of weeks ago we provided a June 1st update of alleged off-target dicamba issues. At that time, most of the injury was confined to specialty crops, vegetables, and ornamental, fruit, and shade trees. We asked university weed scientists and state Department of Agriculture representatives for an update of the situation in their states as of June 15th, and this information is shown in the map and in the tables below.
Dicamba Injured Crops and Plants Becoming More Evident: June 15th Update
A couple of weeks ago we provided a June 1st update of alleged off-target dicamba issues. At that time, most of the injury was confined to specialty crops, vegetables, and ornamental, fruit, and shade trees. We asked university weed scientists and state Department of Agriculture representatives for an update of the situation in their states as of June 15th, and this information is shown in the map and in the tables below.
Dicamba injury mostly confined to specialty crops, ornamentals and trees so Far
Source: University of Missouri By Kevin Bradley Last year we attempted to provide updates as to the extent of dicamba-injured soybean throughout the United States. We finished the season with approximately 2,700 cases under investigation by the various state Departments of Agriculture, and approximately 3.6 million acres of dicamba-injured soybean acres as reported by university weed scientists.
Dicamba Injury Reports, 2018: What a Difference a Year Makes
We finished the 2017 season with approximately 2,700 cases under investigation by the various state Departments of Agriculture, and approximately 3.6 million acres of dicamba-injured soybean acres as reported by university weed scientists. As of June 1, 2018, the reports from university weed scientists and state Department of Agriculture representatives indicate that almost all of the dicamba injury that has occurred in specialty crops, vegetables, and ornamental, fruit, and shade trees.
Dicamba Injury Mostly Confined to Specialty Crops, Ornamentals and Trees so Far
Last year we attempted to provide updates as to the extent of dicamba-injured soybean throughout the United States. We finished the season with approximately 2,700 cases under investigation by the various state Departments of Agriculture, and approximately 3.6 million acres of dicamba-injured soybean acres as reported by university weed scientists. Many have asked us to keep track of this information in 2018, and so we start here with a June 1st update.
MØ: Today mainstream pop includes elements from all over the world
Looking back on 2017, Danish Singer MØ has had a chance to dig deeper into the artistry of music. She has been on the move for a long time and on November 26th she also stopped by Singapore to do her first ever show here. The singer is amazed how pop music today embraces so many different cultures. She is one of the biggest artists on the Danish music scene right now and has with hits like “Final Song”, “Cold Water” and “Lean On” also made it big internationally.
The Situation with Herbicide Resistance in Missouri Waterhemp
In 2012, 187 waterhemp seed samples were collected from soybean fields across the state of Missouri to determine the distribution and extent of herbicide resistance to six different herbicide modes of action. We screened each of these populations to labeled use rates (1X rates) of these herbicides once plants reached 4-inches in height. Results indicate that practically all waterhemp populations are resistant to group 2 (ALS-inhibiting) herbicides like chlorimuron (Classic).
A Final Report on Dicamba-injured Soybean Acres
Throughout the summer we have attempted to provide updates as to the extent of dicamba-injured soybean throughout the United States, either in the form of official dicamba-related cases that are currently under investigation by the state Departments of Agriculture, or as estimates of injured acreage from university extension weed scientists (see Ag Industry, Do we have a problem yet? and Update on Dicamba-related Injury Investigations and Estimates of Injured Soybean Acreage).
Off-target Movement of Dicamba in Missouri. Where Do We Go From Here?
The situation. In 2017, there have been numerous instances of off-target movement of dicamba throughout the state of Missouri and beyond. While the majority of the injury on a per land unit area has definitely occurred in the boot heel of Missouri, there are many problems with off-target movement of dicamba in the rest of the state.
Influence of Cover Crops on Management of Amaranthus Species in Glyphosate- and Glufosinate-Resistant Soybean
A field study was conducted for the 2014 and 2015 growing season in Arkansas, Indiana, Illinois, Missouri, Ohio, and Tennessee to determine the effect of cereal rye and either oats, radish, or annual ryegrass on the control of Amaranthus spp. when integrated with comprehensive herbicide programs in glyphosate-resistant and glufosinate-resistant soybean. Amaranthus species included redroot pigweed, waterhemp, and Palmer amaranth.
Update on Dicamba-related Injury Investigations and Estimates of Injured Soybean Acreage
Several weeks ago we compiled information from many state Departments of Ag about the number of official dicamba-related cases that are currently under investigation in 2017, and also provided estimates from university weed scientists about the number of soybean acres injured in their respective states.
Ag Industry, Do we have a problem yet?
It's funny how we can be living through a situation or watch something unfold in front of our very eyes and one person can view it one way and another can see it totally different. If you think about it, this happens all the time at sporting events. Not too long ago I was watching a Cardinals game with some Cubs fans and all of a sudden they all started yelling that our player was out when I could clearly see that he was in fact, safe. How can that be?
Ag Industry, Do we have a problem yet?
It's funny how we can be living through a situation or watch something unfold in front of our very eyes and one person can view it one way and another can see it totally different. If you think about it, this happens all the time at sporting events. Not too long ago I was watching a Cardinals game with some Cubs fans and all of a sudden they all started yelling that our player was out when I could clearly see that he was in fact, safe. How can that be?
Consider Your Neighbor This Spray Season
As we move into that part of the season where post-emergence herbicide applications are commonly made in soybean, it's important to remember the effects that off-target movement of herbicides can have on others around you. And this year, for the first time ever, we will be able to legally apply dicamba (in the form of Xtendimax, Engenia, or Fexapan) to Xtend-traited soybean. Unfortunately last season we learned a lot of lessons about off-target movement of dicamba the hard way.
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