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Agronomic Crops Network

Ohio State University Extension


C.O.R.N. Newsletter: 2022 - 33

  1. You Can Now Follow OSU Agronomic Crops Team on Twitter

    Follow Us on Twitter

    Receive the latest agronomic news, information, and resources by following the OSU Agronomic Crops Team on Twitter at You may also follow us on Facebook at and subscribe to our YouTube channel at

    The Agronomic Crops Team is a multi-disciplinary group of Extension Educators, Field and State Specialists, and Researchers from Ohio State University Extension. Our mission is to provide accurate and timely information, provide educational opportunities, and conduct research projects addressing the needs of Ohio’s agronomic crop industry. The team is led by Amanda Douridas, Laura Lindsey, and Stephanie Karhoff.

  2. Weather Update: Fall-like Weather with Eyes on the Tropics

    Fall Sky
    Author(s): Aaron Wilson


    After summer-like heat through mid-week last week, a strong cold front ushered fall-like weather into the Ohio Valley, bringing the first reports of patchy frost to low-lying valleys Friday morning. Overall, the month of September has been above average, with temperatures running 1-3°F above the long-term mean (1991-2020). September tends to be a drier month, even more so for much of northern, southern, and west central Ohio this year (Figure 1). On the other hand, wet conditions have prevailed in the Cincinnati region, across the northern Miami Valley, and much of central Ohio, with precipitation running 125-200% of normal in those areas. For the latest up-to-date conditions, seasonal outlooks, and monthly climate summaries, please visit the State Climate Office of Ohio.

    Accumulated Precipitation



    A lot of moving pieces to talk about in the forecast. First, a low-pressure system nearly stationary in southern Ontario is producing lake-effect rain showers and storms across far northeastern counties of Ohio. Rainfall totals have already exceeded 3 inches in spots this past weekend, and this pattern is likely to continue through Wednesday with locally heavy rain (Figure 2). A few scattered afternoon showers are also possible across northern counties in Ohio, with a decreasing chance as you move toward southern counties. Strong high pressure will take control of the weather for Thursday and Friday with tranquil conditions expected. Then, all eyes turn toward the eventual landfall of Hurricane Ian, situated just south of Cuba on Monday afternoon. Current trajectories have the storm reaching Major status by Wednesday morning with winds exceeding 115 mph, with a likely landfall as a weaker storm in the Florida Panhandle early Friday morning. Latest model guidance suggests that moisture from this system could rapidly move into southern and eastern Ohio in the Sunday-Monday timeframe. This may bring gusty winds and heavy downpours to parts of the state, so the situation should be monitored for changes throughout the upcoming week.


    Temperatures will remain about ten degrees below average for much of the week, with highs ranging from the upper 50s to mid 60s (north to south) and overnight lows mainly in the 40s. A few cooler spots might see upper 30s on Thursday and Friday mornings, with a slight chance of patchy frost. Temperatures will moderate into the 60s and 70s this weekend ahead of what’s left of Ian. The Weather Prediction Center is forecasting 1-3 inches of precipitation along Lake Erie in northeast Ohio, 0.75-1.5 inches across southern Ohio with the remnants of Ian, and lighter amounts across west central and northwest Ohio this week (Figure 2).

    Precipitation Forecast


    The Climate Prediction Center’s 6–10-day outlook for the period of October 2 - 6, 2022 and the 16-Day Rainfall Outlook from NOAA/NWS/Ohio River Forecast Center show near to near to above average temperatures and near to below average precipitation are expected (Figure 3). Climate averages include a high-temperature range of 70-74°F, a low-temperature range of 48-52°F, and average weekly total precipitation of 0.65-0.90 inches.

    6-10 Day Outlook for Temperatures and Precipitation

  3. Our Annual Article to Nag about Fall Herbicides and Cressleaf Groundsel

    Cressleaf Groundsel
    Author(s): Mark Loux

    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.  It’s also worth pointing out that we seem to have shifted to wet springs that mess with all kinds of operations, including herbicide burndown.  The inability to apply burndown in a relatively timely manner results in large weedy burndown situations, requiring more complex and expensive herbicide treatments, which can still struggle to be effective enough.  Fall herbicide application results in an essentially weedfree field until sometime in April when giant ragweed and a few spring-emerging winter annuals start to creep in.  And a much easier burndown situation even with weather delays.  We have published a number of articles on this subject, which are still valid and linked below.  A couple changes/additions:

    - Where cressleaf groundsel is a problem in alfalfa hay, we are suggesting use of Pursuit + 2,4-DB (Butryac) in the fall, and not Pursuit or 2,4-DB alone.  Let us know if you have had luck in the fall with single-component treatment.  Spring application of either of these herbicides alone or in a mix is likely to highly variable.  Birdsrape mustard is controlled well in the fall with 2,4-DB alone, but also probably not in the spring.  Control of both of these weeds is much easier in grass hay, due to the abundance of growth regulator options. 

    - Quelex is labeled for application in fall prior to corn and soybeans and should be an effective option in this situation, especially where supplies of 2,4-D or other herbicides are limited.

    Scout now for cressleaf groundsel and other winter weeds in hayfields and pastures (2021)

    Scout now for cressleaf groundsel in hayfields, or pay the price in May (2020) – complete with link to video, fact sheet, and Powerpoint deck.

    Life in a time of glyphosate scarcity – fall burndown (2021) – a good overall resource even if glyphosate is cheap and available

    Fall-applied herbicides:  odds and ends (2020) -  with links to winter annual weed ID info

    Five things to know about fall herbicide treatments (2015)

  4. Lep Monitoring Update: Final Fall Army Update

    Fall Army Worm Caterpillars, Photo Courtesy of Mark Badertscher, 2021

    Fall armyworm trap numbers from September 19th - 25th slightly increased over the past week to 6.6 moths per trap (up from 4.6), but overall remain low for the state. Three counties reported an average over 7 moths per trap including Hardin, Paulding and Sandusky (Figure 1).  This will be our last week reporting FAW trap numbers for the CORN newsletter.

    Fall Armyworm Moth Map

    September 19 – September 25, 2022

    LEP Monitoring for 9.26.22

    Thank you to the following individuals and Educators for placing and monitoring traps in your counties; Amy Raudenbush, Suranga Basnagala, Kyle Akred, Mark Badertscher, Frank Becker, Lee Beers, Carrie Brown, Allen Gahler, Jamie Hampton, Ed Lentz, David Marrison, Sarah Noggle, Eric Richer, Beth Scheckelhoff, Frank Thayer, Chris Zoller, Andy Michel and Kelley Tilmon.

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.


Aaron Wilson (Byrd Polar & Climate Research Center)
Alan Leininger (Educator, Agriculture and Natural Resources)
Allen Gahler (Educator, Agriculture and Natural Resources)
Amanda Douridas, CCA (Educator, Agriculture and Natural Resources)
Amber Emmons, CCA (Water Quality Extension Associate)
Andrew Holden (Resigned Educator, Agriculture and Natural Resources)
Andy Michel (State Specialist, Entomology)
Barry Ward (Program Leader)
Bruce Clevenger, CCA (Field Specialist, Farm Management)
Carrie Brown (Educator, Agriculture and Natural Resources)
Chris Zoller (Educator, Agriculture and Natural Resources)
Clifton Martin, CCA (Educator, Agriculture and Natural Resources)
Clint Schroeder (Program Manager)
Curtis Young, CCA (Educator, Agriculture and Natural Resources)
David Marrison (Educator, Agriculture and Natural Resources)
Elizabeth Hawkins (Field Specialist, Agronomic Systems)
Eric Richer, CCA (Field Specialist, Farm Management)
Glen Arnold, CCA (Field Specialist, Manure Nutrient Management )
Grant Davis, CCA (Educator, Agriculture and Natural Resources)
Greg LaBarge, CPAg/CCA (Field Specialist, Agronomic Systems)
Jamie Hampton (Educator, Agriculture and Natural Resources)
Jessica Runkle (Program Assistant, 4-H Youth Development/Agriculture and Natural Resources)
Laura Lindsey (State Specialist, Soybean and Small Grains)
Lee Beers, CCA (Educator, Agriculture and Natural Resources)
Les Ober, CCA (Educator, Agriculture and Natural Resources)
Mark Badertscher (Educator, Agriculture and Natural Resources)
Mike Estadt (Educator, Agriculture and Natural Resources)
Nick Eckel (Educator, Agriculture and Natural Resources)
Osler Ortez (State Specialist, Corn & Emerging Crops)
Rachel Cochran, CCA (Water Quality Extension Associate, Defiance, Van Wert, Paulding Counties)
Ryan McMichael (Educator, Agriculture and Natural Resources)
Sarah Noggle (Educator, Agriculture and Natural Resources)
Stephanie Karhoff, CCA (Field Specialist, Agronomic Systems)
Taylor Dill (Graduate Student)
Ted Wiseman (Educator, Agriculture and Natural Resources)
Trevor Corboy (Educator, Agriculture and Natural Resources)
Wayne Dellinger, CCA (Educator, Agriculture and Natural Resources)


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.

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