Mark Loux
West Chicago
Outside the box futurist. Foodie. VP Strategy, ResourceOne Fundraising Group
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Articles by Mark Loux
Reminders about residual herbicides
Home/Crops/Reminders about residual herbicides Crops, Ohio Field Leader, Top Headlines, Uncategorized By Dr. Mark Loux, adapted from C.O.R.N. 2023-15 It’s always fun when rainfall is feast or famine. Dry periods such as the coming week are great for about everything except weed management. From the perspective of making sure residual herbicides work, we like to see a decent rain about once a week.
And Now….There’s No Rain - Reminders About Residual Herbicides
By Mark Loux It’s always fun when rainfall is feast or famine. Dry periods such as the coming week are great for about everything except weed management. From the perspective of making sure residual herbicides work, we like to see a decent rain about once a week. Residual herbicide treatments need to be applied and receive a half to one inch of rain within a week or so after tillage or an effective burndown treatment, to control weeds that will start to emerge at that time.
Waterhemp populations on the rise
By Alyssa Essman, Ohio State University Extension Each fall the OSU weed science program conducts a preharvest survey evaluating the frequency and distribution of problematic weed species across the state. Transects are driven through the top 45 to 50 soybean producing counties and visual ratings are given for ten weed species in each soybean field encountered.
4 Guiding Principles of Marestail Management in No-Till Fields
The Ohio State University shares these four guiding principles of marestail management to help no-tillers battle this problem weed. Takeaways Combination of fall and spring burndown herbicides is most effective. Overwintered plants are difficult to control with spring burndown alone. Marestail plants should be dead or dying prior to crop emergence. Most populations are resistant to both glyphosate and ALS inhibitors (site 2) such as Classic and FirstRate.
Giant ragweed still looms large
By Alyssa Essman, Adapted from C.O.R.N. 2022-41 Each fall just before harvest, the OSU weed science program conducts a statewide driving survey evaluating the frequency and distribution of problematic weed species in Ohio. Diagonal transects are driven through the top 45-50 soybean producing counties. Visual ratings are given for ten weed species in each soybean field encountered.
Fall control of tough weeds
By Mark Loux, Ohio State University Extension We have heard a lot about dandelion, wild carrot, poison hemlock, birdsrape mustard, cressleaf groundsel, and annual bluegrass over the past several years. Fall is the best time of the year to control these and a lot of other weeds that cause problems into the following summer, either because they are well established biennials/perennials or they just don’t respond well to herbicides in spring.
Preharvest herbicide treatments for weed desiccation
By Mark Loux, Ohio State University Extension herbicide specialist There are plenty of fields with late season weed problems this year. Weeds that come through the crop canopy late may be small or spindly or sparse enough to be handled easily by a combine. Other fields can benefit from a preharvest herbicide treatment to kill/dissociate weeds, which makes harvesting easier and can reduce weed seed production and foreign matter in harvested grain.
Preharvest Herbicide Treatments for Weed Desiccation
By Mark Loux There are plenty of fields with late season weed problems this year. Weeds that come through the crop canopy late may be small or spindly or sparse enough to be handled easily by a combine. Other fields can benefit from a preharvest herbicide treatment to kill/dissociate weeds, which makes harvesting easier and can reduce weed seed production and foreign matter in harvested grain.
Preharvest Herbicide Treatments for Weed Desiccation
By Mark Loux There are plenty of fields with late season weed problems this year. Weeds that come through the crop canopy late may be small or spindly or sparse enough to be handled easily by a combine. Other fields can benefit from a preharvest herbicide treatment to kill/dissociate weeds, which makes harvesting easier and can reduce weed seed production and foreign matter in harvested grain.
Ohio: Preharvest Herbicide Treatments for Weed Desiccation
There are plenty of fields with late season weed problems this year. Weeds that come through the crop canopy late may be small or spindly or sparse enough to be handled easily by a combine. Other fields can benefit from a preharvest herbicide treatment to kill/dissociate weeds, which makes harvesting easier and can reduce weed seed production and foreign matter in harvested grain.
Rains have kept the crops going
Nathan Birkemeier Everything looks really good right now. We got some rain last week. It was around 3 weeks since the rain shut off. We saw rains of 1 to 2 inches. It really brought everything around. The corn is coming along and the beans are looking good. It was dry for so long and everything was growing roots to get to that moisture. After the rain, things are really going to town now. There are spots here and there, but overall, everyone around here is really happy with the way the crops looks.
Ohio: Double-Crop Soybean Weed Management
It’s been a tough summer in parts of Ohio to do anything on a timely schedule and there are some weedy fields. The best advice we have for big weeds in full-season soybeans is to increase rates and the complexity of POST herbicide applications, while still adhering to cutoffs for the application of certain herbicides as much as possible. Dicamba products, XtendiMax, Engenia, and Tavium, cannot legally be applied to Xtend and XtendiFlex soybeans after June 30.
Double-Crop Soybean Weed Management
By Mark Loux It’s been a tough summer in parts of Ohio to do anything on a timely schedule and there are some weedy fields. The best advice we have for big weeds in full-season soybeans is to increase rates and the complexity of POST herbicide applications, while still adhering to cutoffs for the application of certain herbicides as much as possible. Dicamba products, XtendiMax, Engenia, and Tavium, cannot legally be applied to Xtend and XtendiFlex soybeans after June 30.
Weed control in double-crop beans
Home/Crops/Weed control in double-crop beans Crops, Top Headlines By Mark Loux, Ohio State University Extension herbicide specialist It’s been a tough summer in parts of Ohio to do anything on a timely schedule and there are some weedy fields. The best advice we have for big weeds in full-season soybeans is to increase rates and the complexity of POST herbicide applications, while still adhering to cutoffs for the application of certain herbicides as much as possible.
Hay barn fires are a real hazard
By Jason Hartschuh, CCA, Allen Gahler, Mark Sulc, Ohio State University Extension Mother Nature has been at it again, hardly giving us enough days to make dry hay with a risk of pop-up showers every afternoon. These conditions are very dangerous for hay producers. Since wet hay does just rot it may also burn. Hay fires are caused when bacteria in wet hay create so much heat that the hay spontaneously combusts in the presence of oxygen.
Status of herbicide resistance in Ohio waterhemp populations
By Mark Loux, Ohio State University Extension herbicide specialist We have been screening waterhemp populations over the past few years for their response to various herbicide sites of action. Our overall goal is to get a sense of the types of resistance that have developed or may be developing, so that growers and agronomists know what they should be looking for. We summarized some of this in a fairly lengthy C.O.R.N. article last year.
Status of Herbicide Resistance in Ohio Waterhemp Populations
Farms.com Home › News By Mark Loux We have been screening waterhemp populations over the past few years for their response to various herbicide sites of action. Our overall goal is to get a sense of the types of resistance that have developed or may be developing, so that growers and agronomists know what they should be looking for. We summarized some of this in a fairly lengthy C.O.R.N. article last year.
Cressleaf Groundsel Management
Farms.com Home › News By Mark Loux Reminder about the potential for spring infestations of cressleaf groundsel in wheat, forages, and hayfields. Look for this weed in the rosette stage now so you’re not surprised by the bloom this spring. This weed, poisonous to livestock, is a winter annual that emerges in the fall and flowers in the spring. It’s most likely to occur in new stands that are seeded the previous summer/fall.
Ohio Soybeans: Preemergence Mesotrione Use in “Mesotrione-Tolerant” Varieties
Put this one in the “we’re usually the last to know” category. Following an article in the last C.O.R.N. about the Alite 27 label for use on GT27 soybeans, we became aware that some mesotrione products are labeled for preemergence use on “mesotrione-tolerant” (GT27) soybeans. Products that we know about with this label include Bellum, Motif, and Meso Star. As far we know, all GT27 soybeans are tolerant of mesotrione used preemergence.
The cost of SCN - Ohio Ag Net | Ohio's Country Journal
March 16, 2022 Crops, Ohio Field Leader, Top Headlines By Dusty Sonnenberg, CCA, Ohio Field Leader Soybean Cyst Nematode (SCN) for decades has been considered the most damaging pathogen throughout North America. It is estimated soybean farmers have lost $1.5 billion per year since 1996. “Every 5 years a survey is conducted to determine what counties have SCN present,” said Dr. Greg Tylka, Morrill Professor in the Department of Plant Pathology and Microbiology at Iowa State University.
Preemergence mesotrione use in “mesotrione-tolerant” soybeans
March 16, 2022 Crops, Top Headlines By Mark Loux, Ohio State University Extension herbicide specialist Put this one in the “we’re usually the last to know” category. Following an article in the last C.O.R.N. about the Alite 27 label for use on GT27 soybeans, we became aware that some mesotrione products are labeled for preemergence use on “mesotrione-tolerant” (GT27) soybeans. Products that we know about with this label include Bellum, Motif, and Meso Star.
Ohio: Alite 27 – Residual Herbicide for GT27 Soybeans - AgFax Weed Solutions
Alite 27 is isoxaflutole (Balance Flexx) repackaged and labeled for preemergence use in LL-GT27 soybeans, minus the safener, cyprosulfamide, which protects corn from injury. The LL-GT27 soybean has resistance to glyphosate, glufosinate, and isoxaflutole, and is the only type of soybean that can be used with Alite 27. Isoxaflutole has been used as a residual herbicide in corn for quite a while, but mostly in Corvus now, where it’s combined with thiencarbazone and cyprosulfamide.
Alite 27 residual herbicide for GT27 soybeans
March 1, 2022 Crops, Top Headlines By Mark Loux, Ohio State University Extension herbicide specialist Alite 27 is isoxaflutole (Balance Flexx) repackaged and labeled for preemergence use in LL-GT27 soybeans, minus the safener, cyprosulfamide, which protects corn from injury. The LL-GT27 soybean has resistance to glyphosate, glufosinate, and isoxaflutole, and is the only type of soybean that can be used with Alite 27.
Ohio Weed University
January 26, 2022 Crops, Top Headlines By John Barker, Mark Loux, Tony Nye, Ohio State University Extension Are you concerned about the effectiveness of your herbicide program? Want to sharpen your weed id skills? Not sure which nozzles provide the best control options? Is herbicide resistance REALLY that big of a problem? Are you concerned about palmer amaranth? Did you know that palmer amaranth, waterhemp and other invasive weeds can now be found in most Ohio counties?
New Enlist Labels - When Enlist is Outlawed, Only Outlaws……
By Mark Loux Sometimes you’d like the s**t to stop hitting the fan just long enough to get cleaned up, but you can’t get a break. Like when you’re in the middle of an endless pandemic, a worldwide shipping fiasco, herbicide scarcities and price increases, and parts shortages. And just when you had it worked out to use Enlist herbicides on Enlist soybeans for 2022 so you wouldn’t have to deal with dicamba, their use is no longer legal in your county.
Enlist herbicide banned in 12 Ohio counties
By Mark Loux, Ohio State University Extension herbicide specialist Sometimes you’d like the s**t to stop hitting the fan just long enough to get cleaned up, but you can’t get a break. Like when you’re in the middle of an endless pandemic, a worldwide shipping fiasco, herbicide scarcities and price increases, and parts shortages.
Alternative spring burndown/postemergence strategies when herbicides are in short supply
January 4, 2022 Crops, Ohio Field Leader, Top Headlines By Mark Loux, Adapted from C.O.R.N. 2021-40 There is a lot of speculation about herbicide shortages for the 2022 growing season, and some products are apparently getting more expensive and/or scarce now. This will affect herbicide buying and weed management decisions for the 2022 season.
Keep on spraying: Fall herbicide treatments important in 2021
December 1, 2021 Crops, Top Headlines By Mark Loux, Ohio State University Extension herbicide specialist We don’t usually run articles about fall herbicide application this late in the season, since most everyone is done applying by now. We’ve run several articles on this subject within the past couple months but here’s another one anyway, even if it makes us look pushy and obnoxious. Here’s why.
Ohio: Fall Herbicide Treatments – Just Do It - AgFax Weed Solutions
We don’t usually run articles about fall herbicide application this late in the season, since most everyone is done applying by now. We’ve run several articles on this subject within the past couple months but here’s another one anyway, even if it makes us look pushy and obnoxious. Here’s why.
Ohio: Still a Big Window for Fall Herbicide Treatments
Many growers know the benefits of fall herbicide treatments, and like how fields look the following spring. We know that it’s not always possible to complete harvest and then still find the time, weather, or field conditions to get herbicides applied. This is just a reminder that we have a lot of time yet to apply herbicide this fall.
“New” Weeds Added To The Problem Weed Section Of The Weed Control Guide
BY: BILL JOHNSON, MARK LOUX, AARON HAGER AND MARCELO ZIMMER Each fall we revise and update our Weed Control Guide for Ohio, Indiana, and Illinois (WS-16) publication. This year, in addition to incorporating a few new herbicide names and subtle label change information, we are adding information to the problem weed section on control of Cressleaf Groundsel, Poison Hemlock, and Annual Bluegrass.
Scout now for cressleaf groundsel and other winter weeds in hayfields and pastures
Cressleaf groundsel. Photo by OSU Extension. October 4, 2021 Crops, Top Headlines By Mark Loux, Ohio State University Extension herbicide specialist The next month and a half or so is an ideal time to control a number of weeds that cause problems in hayfields and pastures, and also certain weeds in fencerows and other areas adjacent to fields.
Burndown Options for No-Till Wheat in the Face of Glyphosate Scarcity
By Mark Loux It’s been a strange couple of years of shortages and supply chain problems. And just when you think nothing else could happen, the supply of glyphosate, which is usually way more abundant than water in the American West, has apparently become short. This is forcing decisions about where glyphosate has the most value.
Life in a time of glyphosate scarcity
September 23, 2021 Crops, Ohio Field Leader, Top Headlines By Dr. Mark Loux, OSU Extension Weed Specialist, Adapted from C.O.R.N. 2021-31 & 32 It’s been a strange couple of years with shortages and supply chain problems. And just when you think anything else couldn’t happen, the supply of glyphosate, which is usually way more abundant than water in the American West, has apparently become short. This is forcing decisions about where glyphosate has the most value.
Herbicide Scarcity and Fall Burndown Options, Part 2
By Mark Loux Recap – some brands of glyphosate will be in short supply for the near future, and we’ve also learned that glufosinate may be subject to this also. A glyphosate shortage will have more impact in spring than in fall really, assuming it persists that long. We covered burndown for no-till wheat last week, but this shortage affects fall herbicide decisions also.
Burndown Options for No-Till Wheat in the Face of Glyphosate Scarcity
By Mark Loux It’s been a strange couple of years of shortages and supply chain problems. And just when you think nothing else could happen, the supply of glyphosate, which is usually way more abundant than water in the American West, has apparently become short. This is forcing decisions about where glyphosate has the most value.
Get your waterhemp populations screened for herbicide resistance
Waterhemp July 29, 2021 Crops, Ohio Field Leader, Top Headlines By Dr. Mark Loux, OSU Extension State Weed Specialist, Adapted from C.O.R.N. 2021-24 We have been screening a random sample of waterhemp populations for herbicide resistance over the past two years. Herbicides used in the screen include mesotrione, atrazine, 2,4-D, fomesafen, and metolachlor.
Putting Poison Hemlock in Perspective
By Mark Loux and Ted Wiseman et.al Poison hemlock seems to be on everyone’s radar more than usual this year, especially in northern Ohio. We know that while hemlock has been all over southern Ohio for years, it is continuing to spread northward, where new occurrences and observations of it may be engendering concern in the general public and local government.
Canada thistle rebounds
Canada thistle. Photo by OSU Extension. June 30, 2021 Crops, Ohio Field Leader, Top Headlines By Mark Loux, Ohio State University Extension It can be nice to see old friends. Except when they cause crop and yield loss, refuse to leave after a few days, and don’t respond to chemicals. A while back we wrote about what appeared to be an increase in populations of dandelions and other winter weeds and made some guesses about why this was happening.
Canada Thistle Rebounds?
By Mark Loux It can be nice to see old friends. Except when they cause crop and yield loss, refuse to leave after a few days, and don’t respond to chemicals. A while back we wrote about what appeared to be an increase in populations of dandelions and other winter weeds and made some guesses about why this was happening. Canada thistle has once again become a problem in some fields in a big way, probably for some of the same reasons that dandelion has.
Ohio: Adapting Burndown Programs to Late-Planted Situations
It’s déjà vu all over again. We have run this article every few years, and it seems like maybe the frequency is increasing as we deal with wet and cold weather that delays planting. The questions about this have not changed much, and neither have the suggestions we provide here.
Weed control and delayed planting
By Mark Loux, Ohio State University Extension It’s déjà vu all over again. We have run this article every few years, and it seems like maybe the frequency is increasing as we deal with wet and cold weather that delays planting. The questions about this have not changed much, and neither have the suggestions we provide here.
Adapting Burndown Programs to Late-Planted Situations
By Mark Loux It’s déjà vu all over again. We have run this article every few years, and it seems like maybe the frequency is increasing as we deal with wet and cold weather that delays planting. The questions about this have not changed much, and neither have the suggestions we provide here.
Early weed control is best to lower yield losses
April 21, 2021 Crops, Top Headlines By Harold Watters and Greg LaBarge, Ohio State University Extension When maximizing yield is the goal, controlling early season weeds is critical. Managing weed competition is the one pest management decision we make each year in every field. Weeds compete with the crop for available water, nutrients, and light starting at crop emergence.
Control of dandelion with spring/summer herbicide treatments - Ohio Ag Net | Ohio's Country Journal
April 13, 2021 Crops, Ohio Field Leader, Top Headlines By Dr. Mark Loux, Ohio State University Extension Weed Specialist, Adapted from C.O.R.N. 2021-08 Dandelion seems to be on the increase in some fields, as we noted in a video last summer and CORN article last fall. Fall is the optimum time of year to reduce dandelion populations with herbicides, so we expect them to become more of a problem in fields that are not treated in the fall at least occasionally.
Controlling Dandelion with Spring and Summer Herbicide Treatments
By Mark Loux, Ohio State University Extension Dandelion seems to be on the increase in some fields, as noted in a video last summer and CORN article last fall. Fall is the optimum time of year to reduce dandelion populations with herbicides, so we expect them to become more of a problem in fields that are not treated in the fall at least occasionally.
Ohio: Dandelion Control - Spring/Summer Herbicide Options
Dandelion seems to be on the increase in some fields, as we noted in a video last summer and CORN article last fall. Fall is the optimum time of year to reduce dandelion populations with herbicides, so we expect them to become more of a problem in fields that are not treated in the fall at least occasionally.
Scout Now For Cressleaf Groundsel And Other Winter Weeds In Hayfields And Pastures
By Mark Loux The next month and a half or so is an ideal time to control a number of weeds that cause problems in hayfields and pastures, and also certain weeds in fencerows and other areas adjacent to fields. We discussed scouting and fall control of cressleaf groundsel in a C.O.R.N. article last fall, to avoid problems with the toxicity of this weed in hay next year.
Herbicide resistance in Ohio waterhemp populations
Waterhemp February 4, 2021 Crops, Ohio Field Leader, Top Headlines By Dr. Mark Loux, Ohio State University Extension Waterhemp populations across the Midwest continue to develop more complex variations of herbicide resistance. Multiple resistance to an increasing number of herbicide sites of action is the norm in many populations in states west of Ohio.
Data management important in 2021
Downforce maps are just one example of a data layer that can be shared through digital technologies to realize value. January 20, 2021 Crops, Top Headlines Agriculture has become adept at collecting data, but continues to fall short of the economic and environmental promise the information bonanza represents.
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