C.O.R.N. Newsletter: 2022-05
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Using the Corn Nitrogen Rate Calculator
Throughout this winter meeting season, fertilizer has been a hot topic. Generally, the discussion has been around nitrogen price and availability. Most of us have little to no influence on price or availability, but as a farmer, you decide your corn (and wheat) nitrogen rates, assuming you can get the nitrogen product you want. Your corn nitrogen rate could likely cost $100 per acre more in 2022 as compared to the year prior and nitrogen will probably surpass seed as the most expensive variable cost per acre this year. As such, it is important to note that the most recent revision (2020) of the Tri-State Fertilizer Recommendations for Corn, Soybean, Wheat and Alfalfa moved from nitrogen rate recommendations based on yield--from the original ‘Tri-States’--to a nitrogen rate based on maximum profitability or a maximum return to nitrogen (MRTN) rate. Sometimes the maximum return to nitrogen rate is referred to as the Economic Optimum Nitrogen Rate (EONR).
In the Corn Belt, the corn nitrogen rate calculator has been developed to generate these economic optimum rates. The purpose of this article is to help you understand what the corn nitrogen rate calculator is and how to use it. You can find the calculator at http://cnrc.agron.iastate.edu/ The calculator utilizes yield and rate data from on-farm and small plot research trials in Illinois, Indiana, Iowa, Michigan, Minnesota, Ohio and Wisconsin. The Ohio recommendations are based on nearly 300 corn nitrogen rate trials in the state. After selecting your state, you will need to select the crop rotation. See Figure 1. The third input is the source of nitrogen you will use and the price per ton you expect to pay. The final input is the price per bushel of corn at which you expect to sell your corn. Watch this short video to see how to use the Corn Nitrogen Rate Calculator.
Once you click calculate, a return to nitrogen graph is presented with three different lines plotted: Gross Return to N, Net Return to N, and Fertilizer N Cost. The Net Return to N line is arguably the most important. It identifies the N rate where the last unit of added nitrogen has an economic return (EONR) or in other words, it identifies the last unit of N that creates profit for your farm, given the N price and corn price inputs. Additionally, the output page identifies a profitable N rate range that suggests a little bit of ‘wiggle room’ for your total N rate, often times 10-20 lbs of N above and below the EONR (aka MRTN).
At a very basic , but helpful level, the output page calculates your nitrogen price per pound based on the product price per ton input. Is nitrogen cost per pound $.90 or $.30 this year? Another basic calculation that the output page provides is the nitrogen-to-corn price ratio. In the 2021 growing season, many farmers had a nitrogen-to-corn price ratio below one tenth (.1). What is your price ratio this year? See Figure 2 for the outputs when $1,500/ton anhydrous is used in Ohio, corn after soybean rotation, and with an expected corn price of $5.50/bushel.
The corn nitrogen rate calculator identifies an economic optimum rate based on corn and nitrogen prices, all other things constant. As farmers, you know that growing conditions aren’t always constant. On your own farm, I encourage you to use local weather, soil type, pre-sidedress N tests, manure history, and previous performance to refine your nitrogen rate in-season or with adaptive nitrogen management approaches.
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Alite 27 – Residual Herbicide for GT27 Soybeans
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. While there are many residual premixes for soybeans that control/suppress grasses and broadleaf weeds, Alite 27 probably has a broader spectrum that any other single active ingredient product. Alite 27 can provide about 70% initial control of many annual grasses, and we rate it an 8 or 9 on most broadleaf weeds. It can provide about 60% initial control of burcucumber and giant ragweed (at least the early-season emergers). Many populations of common and giant ragweed in Ohio have at least some degree of resistance to site 2 herbicides (ALS inhibitors – chlorimuron, cloransulam, etc). This results in a complete lack of residual herbicide options for control of giant ragweed, and only flumioxazin for common ragweed. So – one of the fits for Alite 27 is to improve residual control of these ALS-resistant weeds, as long as the right soybean is being planted. We have conducted limited research to determine whether there’s a benefit to mixing Alite 27 with other residual herbicides, and determined it’s probably not necessary in many fields that are receiving an adequate follow up POST herbicide treatment. Adding another herbicide could help with resistance management and improve control of grasses and waterhemp.
Aside from being useful only in GT27 soybeans, the other catch is that Alite 27 is currently labeled for use only in certain Ohio counties. We don’t know the reason for this. These counties are: Allen, Auglaize, Belmont, Carroll, Columbiana, Crawford, Darke, Guernsey,Hancock, Harrison, Lake (are there soybeans here?), Mercer, Monroe, Morgan, Morrow, Muskingum, Noble, Preble, Richland, Shelby, Van Wert, Washington,Wyandot. For more info, check the weed control guide and the Alite 27 label.
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CTTC Update – Masks Optional, Early Bird Registration Through March 1
Due to recent changes by the CDC with masking guidelines and the fact that the CDC COVID-19 transmission level for Hardin County has dropped, hospitalizations in the local area and in Ohio are declining, campus COVID case numbers are decreasing, and that severity continues to remain low, Ohio Northern University has indicated that masks are now optional in public indoor spaces on the ONU campus which includes the buildings that house the Conservation Tillage & Technology Conference.
As a result of these recent changes, the Conservation Tillage & Technology Conference, scheduled for March 8-9 at Ohio Northern University in Ada will extend its early bird registration rate of $100 through Tuesday, March 1. This extension of the early bird conference registration rate is reflected at the online registration site which can be found at https://www.allenswcd.com/cttc/. Further information about the CTTC can be found, including the final list of topics and presenters at http://ctc.osu.edu.
In addition, information and registration for the Midwest Cover Crops Council meeting being held the day before the conference on March 7, can be found at these two websites. Although the ctc.osu.edu website still mentions that masks are currently required as of writing this article, a request for updating this website has been made. If you have any questions about these changes, you can contact Randall Reeder at reederassociates@gmail.com. Anyone who wants to wear a mask will be welcome. In fact, there will be extra masks on hand, plus hand sanitizer for conference attendees for those who prefer to use it.
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Wheat Refresh and Field Walk
Whether it’s been a while since you’ve grown wheat or been a while since you have evaluated a wheat field, it is time to freshen up on how to do so. Even if you’re considering growing wheat for the first time, this event will get you started off on the right foot.
On March 30, we’ll walk a field with Dr. Laura Lindsey who will show us how to evaluate the field coming out of winter and refresh growth staging the wheat. Growth staging is critical for nutrient and crop protection applications. Resources and recommendations on disease scouting and control will also be shared.
Nate Douridas, Farm Manager of the Molly Caren Ag Center, will have a sprayer setup for nitrogen application which will lead into recommendations for wheat. An air seeder will also be setup to discuss seeding timing, row spacing and rates. There will be a combine with a wheat specific setup on site along with an equipment specialist from Ag-Pro Ohio to answer questions.
CCA credits offered: 1 CM, 1 NM.
Please RSVP for the free event. Doughnuts, coffee and a limited number of Corn, Soybean, Wheat and Alfalfa Field Guides will be provided. Contact information is needed to notify in the event of a cancellation.
March 30, 8:30 – 10:30 a.m.,
Molly Caren Ag Center North Farm1782 OH-38, London, OH 4314 (2 miles north of Farm Science Review on St. Rt. 38).
Registration: https://go.osu.edu/wheatrefreshContact: Amanda Douridas, Douridas.9@osu.edu
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Alternative Spring Burndown/Postemergence Strategies When Herbicides are in Short Supply
Note: This is a repeat (mostly) of an article that ran in C.O.R.N. last November. It represents the combined thinking of weed scientists from Indiana, Kentucky, Michigan, Ohio and Pennsylvania
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. The two main active ingredients that we’re hearing about right now are glyphosate (Roundup, others) and glufosinate (Liberty, others), for which prices have increased substantially. There will likely be limited supplies of other pesticide active ingredients as well, but in the short term, a shortage of these two active ingredients poses some major challenges for corn and soybean production. The purpose of this article is to discuss ways to minimize the impact of herbicide shortages, primarily glyphosate, on corn and soybean production. As you search for alternatives to these two herbicides and others, the weed control guides and technical guides produced by University Extension and industry are an important tool for planning weed management programs and herbicide purchases. Links to the university publications are at the end of this article. Feel free to contact us also when trying to sort through options (loux.1@osu.edu).
Some guiding principles based on our experience that may help with decisions, especially where glyphosate will not be in all applications:
1. Spring tillage is an option to replace herbicide burndown. Can cause long-term compaction problems if tilled when too wet. Waiting until weeds are large makes tillage less effective. Weeds that survive tillage will be difficult to control with POST herbicides. In other words, till when soil conditions are fit and before weeds are huge.
2. Where it’s only possible to use glyphosate once, it may be needed most in the burndown. Saflufenacil can be added for enhanced control of rye and ryegrass, and marestail. ACCase herbicides (e.g. clethodim, quizalifop) can then be used for POST grass control in soybeans. Glufosinate, Enlist Duo, or XtendiMax/Engenia can be used for many broadleaf weeds, especially the glyphosate-resistant ones. Where residual herbicides are omitted, or do not provide enough control, we would expect POST treatments to struggle more in the absence of glyphosate with weeds such as lambsquarters. So use residuals. Glyphosate is still more than just a grass herbicide.
3. If glyphosate is omitted from burndown, grasses become a bigger issue than broadleaf weeds. Options for annual grasses: Gramoxone; rimsulfuron – if small, corn only; ACCase herbicides – clethodim (wait 7 days to plant corn), quizalifop (soybeans only) – need 60 degree days, apply alone if possible, weak on winter annuals under cold conditions. Where trying to reduce glyphosate rates, a rate of 0.38 lb ae/A will control most annual grasses.
4. Burndown programs typically contain two to three “burndown” herbicides in order to ensure control of a diversity of weeds under various environmental conditions. This is why glyphosate is not used alone in burndown programs, but mixed with 2,4-D, dicamba, or Sharpen. We suggest following this same strategy when glyphosate is omitted – try to have at least two herbicides with substantial burndown activity in the mix. Increasing rates of components of the burndown mix should be generally helpful, in accordance with label guidelines for soil type, weed size, time until planting, etc. There are also other herbicides that can improve control in some mixes although we don’t consider them “burndown” herbicides on their own – chlorimuron, atrazine, metribuzin.
5. There are generally more options for burndown and POST applications in corn compared with soybeans, so it might make sense to save a limited supply of glyphosate and glufosinate for use in soybeans.
6. Control of little barley and annual (Italian) ryegrass in a burndown requires glyphosate, ACCase herbicides are not effective enough in spring. For annual bluegrass – ACCase can work - 60 degree day, no tank mixes. High rates of metribuzin can provide fair control of bluegrass.
7. For burndown of a legume cover prior to corn in the absence of glyphosate, clopyralid and dicamba are the most effective herbicides. For cereal rye burndown in corn, best option is Gramoxone plus atrazine applied with surfactant or crop oil and at least 10 gallons of 28%.
8. Best non-glyphosate option for control of rye in soybeans is a high rate of clethodim (10 to 14 oz of 2L/12 to 16 of Select Max) or Assure II (10 to 12 oz) applied before the boot stage. Apply with crop oil concentrate and AMS (17#/100 gallons). For Select Max, can use crop oil or nonionic surfactant. Apply when nighttime temperatures are no lower than 50 degrees. Mixing with most other herbicides can reduce effectiveness. We expect these herbicides to be variable in their control of rye.
9. It’s possible to chop and bale a cover, then use glyphosate POST to kill regrowth. The addition of an ACCase herbicide may help control regrowth in soybeans. POST corn herbicides will not kill the rye, including nicosulfuron, rimsulfuron, and Group 27 herbicides (Impact, Shieldex, Laudis etc).
10. Mixing ACCase herbicides with dicamba or 2,4-D (no glyphosate) can cause reduction in grass control due to antagonism. Apply separately to avoid this.
11. Increasing the number of applications can help with weed and herbicide management when certain products are short or glyphosate rates need to be reduced. For example, three applications instead of two: 1) Fall or early spring burndown when weeds are small; 2) residuals plus possibly additional low-rate burndown at planting; 3) POST.
12. Best opportunity to omit glyphosate or reduce the rate will be: 1) in fields treated the previous fall, or those with a low population of small weeds; and 2) where the POST program is comprehensive enough to control weeds that escape the burndown – Enlist, XtendiFlex, LL GT27 (their effectiveness also depends upon whether glyphosate is being used POST).
13. Take all necessary steps to maximize herbicide activity - optimize adjuvants and sprayer parameters (nozzles, volume, pressure, speed) per label guidelines.
14. Check on availability of premix herbicides that may contain glyphosate or another herbicide that is unavailable as a single ingredient product. Examples that contain glyphosate – Sequence, Halex GT, Acuron GT, Extreme, Flexstar GT.
Burndown programs that deemphasize use of glyphosate – pros and cons.
Can be used in corn and soybeans
Gramoxone + 2,4-D + metribuzin/atrazine (atrazine – corn only)
Strengths: best non-glyphosate option for rye burndown; adequate for general spring weeds including marestail <6” tall; can be applied before either corn or soybeans (depending on rate); has activity on grasses
Weakness: perennial weeds; large marestail; annual ryegrass; special training required to apply
Comments: Metribuzin rate for corn varies by soil type and is limited to a maximum of 5.33 oz of 75DF.
Sharpen + glyphosate (low rate 0.38 - 0.56 lb ae/A) + 2,4-D
Strengths: adequate cereal rye and other cover crop burndown; marestail control; can be applied before either corn or soybeans (depending on rate)
Weakness: large weeds; overall weed control is fair due to low glyphosate rate
Comment: Rates higher than 1 oz require wait of 15 to 30 days to plant soybeans. Must wait 2 weeks to plant soybeans if 1 oz is mixed with flumioxazin or sulfentrazone product.
Sharpen + 2,4-D + metribuzin/atrazine (atrazine – corn only)
Strengths: good foliar and residual marestail control; good initial Palmer/waterhemp control; burndown and residual in one pass
Weakness: does not control grasses (atrazine control grass up to an inch when applied with oil); must wait 2 weeks to plant soybeans if mixed with flumioxazin or sulfentrazone product. Metribuzin rate for corn varies by soil type and is limited to a maximum of 5.33 oz of 75DF.
Basis Blend/other rimsulfuron products + 2,4-D + metribuzin/atrazine
Comments: some grass control; limited burndown activity on several key species; better used in corn due to long wait to plant soybeans (15 to 60 days)
Harmony Extra/similar products + 2,4-D + metribuzin
Comments: average (70-80%) control on many key broadleaves; no grass control; additional residuals and POST products necessary for in crop weed control; can be used in corn or soybean
Corn only
Acuron/Lexar/generic equivalents/Resicore + atrazine
Strengths: winter and summer annuals; burndown and residual in one-pass; can add more atrazine or 2,4-D
Weakness: poor control of cereal rye and ryegrass; corn only
Soybeans only
2,4-D + metribuzin + clethodim
Strengths: some grass suppression including cereal rye and ryegrass;
Weakness: 2,4-D antagonizes clethodim activity; cool weather limits clethodim activity; use rate of clethodim is not high enough if used before corn planting
Metribuzin + 2,4-D + chlorimuron product
Comments: good fit in fields that were treated prior fall; Some chlorimuron products contain metribuzin – suggest supplementing with additional metribuzin so total is the equivalent of 6 to 12 oz of 75DF. Does not control grasses. Canopy/Cloak Ex contains tribenuron, which improves control of chickweed.
Click here to print a pdf of this article
“Weed Control Guide for Ohio, Indiana, and Illinois”
“Mid-Atlantic Weed Control Guide”
“MSU Weed Control Guide for Field Crops”
“2022 Weed Control Recommendations for Kentucky Field Crops”
Take Action fact sheet on cover crop termination
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IT'S A WORM’S WORLD! The Impact of Nematology on Plant and Soil Health
“If all the matter in the universe except the nematodes were swept away, our world would still be dimly recognizable . . .” Nathan Cobb (1915)
If nematodes are so abundant, why do we know so little about them?
The Plant Nematology Lab (PLNTPTH 6002.02) and The Department of Plant Pathology invite everyone to our nematology panel in-person and via Zoom.
Prestigious nematologists and scientists will answer your questions about nematodes and the impact of nematology, particularly on plant and soil health.
Do not miss the opportunity to ask your questions to Drs. Greg Tylka, Terry Niblack, Chris Taylor, and Tom Mitchell.
Join us to learn more about these fascinating animals!
MONDAY, MARCH 7, 3:00 – 4:00 PM EST – PANEL
Panelists also available for informal discussion, 4:00 - 4:30 PM
In-person location: Kottman Hall 102 [2021 Coffey Rd., Columbus, OH 43210]
Zoom: register here! [link: http://go.osu.edu/nema_panel_osu_2022]
Contacts: lopez-nicora.1@osu.edu and lewandowski.52@osu.edu
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Don’t Miss Greg Tylka’s Seminar on the Most Damaging Pathogen of Soybean
Dr. Greg Tylka, prestigious nematologist from Iowa State University, will visit the Department of Plant Pathology at Ohio State University and give a seminar titled:
“SCN-resistant soybean varieties: a cautionary tale of too much of a good thing and how ‘free’ sometimes has a cost”
The soybean cyst nematode (SCN) is the most damaging pathogen of soybean in North America. Resistant varieties have allowed farmers to produce soybeans profitably in SCN-infested fields for many years. But observations and experimental data indicate that the effectiveness of SCN management with commonly available resistant soybean varieties is diminishing. This seminar will include discussions of SCN management in the past and currently and will conclude with conjecture about what the future of SCN management may hold based on biological and economic factors.
The Department of Plant Pathology welcomes everyone to attend Dr. Greg Tylka’s seminar via Zoom.
REGISTER to attend Dr. Greg Tylka’s seminar on Monday March 07th 2022 at 1:00pm EST, using the following link:
https://go.osu.edu/greg_tylka_seminar_osu_2022
Don’t miss Dr. Greg Tylka’s seminar on the most damaging pathogen of soybean!
Check this video: SCN is North America’s most damaging soybean pathogen
Dr. Greg Tylka is a Morrill Professor in the Department of Plant Pathology and Microbiology at Iowa State University with extension and research responsibilities for management of plant-parasitic nematodes. The focus of Dr. Tylka's research program at Iowa State University is primarily the soybean cyst nematode (SCN), Heterodera glycines.
Current research includes study of SCN-resistant soybean varieties, effects of nematode-protectant seed treatments, and the effects of cover crops on SCN biology and management. He also serves as director of the Iowa Soybean Research Center at Iowa State University.
Dr. Tylka was born and raised in southwestern Pennsylvania, just outside of Pittsburgh. He attended California University of Pennsylvania, where he earned his bachelor's degree and master's degree in biology. He then attended the University of Georgia, where he earned his doctoral degree in plant pathology.
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Corn College and Soybean School Recordings Available
Did you miss our Corn College and Soybean School this year? We have you covered! Check out the AgCrops Team YouTube channel for all the recordings: https://www.youtube.com/playlist?list=PLYlh_BdeqniLOu-Q32gjLcKQliE9p3P9B
Recordings include:
- Soybean Management for 2022 by Dr. Laura Lindsey. This recording covers soybean planting date, including ultra-early dates. Dr. Lindsey also includes information about cover crop termination timing prior to soybean planting. Link: https://www.youtube.com/watch?v=lS3MyThsFxE&list=PLYlh_BdeqniLOu-Q32gjLcKQliE9p3P9B&index=6&t=1500s
- Corn Management for 2022 by Dr. Osler Ortez. Dr. Ortez discusses a wide-range of corn topics, including abnormal ears, the national corn yield contest, and observations from the Ohio Corn Performance Test. Link: https://www.youtube.com/watch?v=gGQWyi5z6Nk&list=PLYlh_BdeqniLOu-Q32gjLcKQliE9p3P9B&index=6
- Soybean Cyst Nematode and Other Soilborne Pathogens by Dr. Horacio Lopez-Nicora. Learn about soybean cyst nematode damage and management as well as damage and management of other soilborne pathogens. Dr. Lopez-Nicora also covers seed treatment options in soybean. Link: https://www.youtube.com/watch?v=BUbpcePKA3I&list=PLYlh_BdeqniLOu-Q32gjLcKQliE9p3P9B&index=8
- Field Crop Diseases: Emphasis on Corn Tar Spot by Dr. Pierce Paul. Hear from Dr. Paul on environmental conditions that favor tar spot and foliar fungicide options. Link: https://www.youtube.com/watch?v=W5r1Oan_Y7k&list=PLYlh_BdeqniLOu-Q32gjLcKQliE9p3P9B&index=7
- Insects Are Full of Surprises: Field Crop Gotchas by Dr. Kelley Tilmon. Dr. Tilmon covers soybean gall midge as an emerging soybean pest in the western soybean belt as well as fall armyworm. Link: https://www.youtube.com/watch?v=x_rMcx3eZMU&list=PLYlh_BdeqniLOu-Q32gjLcKQliE9p3P9B&index=1
- Corn Insect Management by Dr. Andy Michel. Dr. Michel provides an overview of corn insect management. Topics include: Asiatic garden beetle, caterpillars in ears, and Bt resistance. Link: https://www.youtube.com/watch?v=8hKHg3O9MPs&list=PLYlh_BdeqniLOu-Q32gjLcKQliE9p3P9B&index=4
- 2022 Weed Management Update for Corn and Soybeans by Dr. Mark Loux. Dr. Loux provides information on corn and soybean herbicide options and updates to weed prevalence in Ohio. Link: https://www.youtube.com/watch?v=qn4uUGj0bPI&list=PLYlh_BdeqniLOu-Q32gjLcKQliE9p3P9B&index=3
- Meeting Nutrient Needs for Corn and Soybean by Dr. Steve Culman. Learn about soil sampling strategies and pH management, corn nitrogen rates, and update from on-farm trials in Ohio. Link: https://www.youtube.com/watch?v=T6q_tpQ936U&list=PLYlh_BdeqniLOu-Q32gjLcKQliE9p3P9B&index=2
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2022 Central Ohio Agronomy School: The Nuts & Bolts About Corn & Soybean Production
The 2022 Central Ohio Agronomy School will be held on Monday evenings, beginning on Monday, March 7 through Monday, March 28, from 6:30 –9:00 p.m. at the Ramser 4-H Activity Center 700 Perimeter Dr. Mount Vernon, Ohio 43050 (on the fairgrounds). This four-week program will provide the attendees with the most comprehensive, up-to-date crop production and agricultural technology information available today. This school is designed with everyone in mind; part-time or full-time producer, beginner or CCA agronomist. Within each subject area we will teach the basic concepts and progress to the most advanced agronomic principles.
Topics include:
March 7 - Weed ID With Live Plants - Key Identifying Characteristics
John Barker, Ag Educator, Knox County
I Have It … Now How Do I Get Rid of It? – Developing Multi-Year Herbicide Programs
Dr. Mark Loux, OSU Weed Science
March 14 - Local, State and National Issues Facing American Farmers
John Linder, Chairman National Corn Growers Association
Are Retirement Plans in Your Future – What Do I Need To Consider?
David Marrison, OSU Extension - Coshocton County
March 21 – Corn Disease Update – Tar Spot, Vomitoxin and Much More
Dr. Pierce Paul, OSU Plant Pathology
Carbon Credits - Is There Really A Market In Ohio?
Mike Estadt, OSU Extension - Pickaway County
March 28 – Solar Leasing Considerations For Ohio Farmers?
Eric Romich, Field Specialist Energy Education Ohio State University Extension
Ag Outlook - Farming In A World Facing Supply Chain & COVID Issues
Ben Brown, Sr. Research Associate Univ. of Missouri Extension
This school will provide:
11.5 continuing education credits (CEU’s) for Certified Crop Advisors,
C.M. 2, I.P.M. 5.5, N.M 1, P.D. 3.
8.5 hours of Commercial Pesticide & Fertilizer Credits
Core, 2A, 2C, 2D, 9, and 15 (fertilizer).
8.5 hours of Private Pesticide & Fertilizer Credits
Core, Cat 1, Cat 2, Cat 6, and Cat 15 (fertilizer).
Registration costs vary due to CCA credits and pesticide applicator credits.
This program is sponsored by Advantage Ag & Equipment, B&B Farm Service, Central Ohio Farmers CO-OP, Clark Seeds, Cubbage Electric, Farmcredit, Seed Consultants, and The Ohio State University Extension,
For more information contact the OSU Extension Office in Knox County (740-397-0401). The following link will provide more information for this program. https://u.osu.edu/knoxcountyag/2022/01/28/2022-central-ohio-agronomy-school/
Crop Observation and Recommendation Network
C.O.R.N. Newsletter is a summary of crop observations, related information, and appropriate recommendations for Ohio crop producers and industry. C.O.R.N. Newsletter is produced by the Ohio State University Extension Agronomy Team, state specialists at The Ohio State University and the Ohio Agricultural Research and Development Center (OARDC). C.O.R.N. Newsletter questions are directed to Extension and OARDC state specialists and associates at Ohio State.
Contributors
Disclaimer
The information presented here, along with any trade names used, is supplied with the understanding that no discrimination is intended and no endorsement is made by Ohio State University Extension is implied. Although every attempt is made to produce information that is complete, timely, and accurate, the pesticide user bears responsibility of consulting the pesticide label and adhering to those directions.
CFAES provides research and related educational programs to clientele on a nondiscriminatory basis. For an accessible format of this publication, visit cfaes.osu.edu/accessibility.