C.O.R.N. Newsletter: 2016-31

  1. Fall Weed Control Odds and Ends

    Author(s): Mark Loux

    1.  Cressleaf groundsel, which is poisonous to livestock, has caught some hay and livestock producers by surprise when they discover it in late spring in hay or pasture.  Some hay producers have had to discard hay from first cuttings due to an abundance of this yellow-flowered weed.  Cressleaf groundsel is a winter annual weed that is easily controlled in the fall, when in the rosette stage, in most crop situations.  Take time to scout fields this fall to determine whether cressleaf groundsel is present, especially in new summer seedings or fields with a history of this weed problem.

    2.  Check the C.O.R.N. archive for articles on burndown options for no-till wheat and fall herbicide treatments prior to corn or soybeans.  Not much has changed and these should generally be current still.  With regard to fields where the tentative plan is to plant Enlist and Xtend soybeans, we suggest continuing with fall herbicide treatments to minimize the variability in spring marestail burndown that can occur with both 2,4-D and dicamba.

    3.  For growers with waterhemp, reminder to take advantage of a $50 service offered by the University of Illinois to screen populations for resistance to glyphosate and site 14 herbicides (Flexstar, Cobra, etc).  Where Roundup Ready soybeans will be planted in future years, these are the only POST options for waterhemp, so it’s essential to know whether they are still effective.  This involves the overnight shipment of leaves, not seed, which is still possible but time is running out.  See the July 26 edition of C.O.R.N.  (https://agcrops.osu.edu/newsletter/corn-newsletter/2016-22) for more information.

    4.  Keep an eye out for waterhemp and Palmer amaranth when harvesting, with the goal of preventing further spread if found.  Where plants or patches of these are encountered, think twice about just harvesting right through them.  Doing so will disperse seed more widely throughout the field being harvested, and also contaminate combines with the possibility then of spread to other fields.  We have seen all of this occur in our investigations of Palmer amaranth.  The wiser choice where these weeds are encountered, or where additional help with identification is needed – avoid harvesting through the weeds for now, get positive identification, and remove them by hand prior to harvesting the crop in that area.


  2. Weather Outlook


    Wetter and cooler weather is in store for the end of September as we discussed several weeks back. This could linger into the 1st and 2nd of October. Rainfall for the next week will average 0.50 to 1.00 inches with isolated higher totals in the northern half of the state. Temperatures will average a few degrees below normal over the next week.

    However, it appears October and November will resume the overall warmer and drier than normal pattern supporting harvest season. Temperatures are likely to be 1-4F above normal for October and November. Rainfall will likely be normal to 1 inch below normal.

    The risk for fall freeze is normal to 1-2 weeks later than normal. Typically fall freeze dates range from October 10-20 across much of the state.

    The early winter outlook calls for a turn to slightly colder and wetter than normal conditions with snowfall slightly above normal. Hence, don't expect a warm winter like last winter.

    The NOAA/NWS/OHRFC 16-day rainfall outlook can be seen here (outlook) and calls for 0.50 to 1.00 inches southwest Ohio to 1-3 inches in northeast Ohio.


  3. Ohio State PLOTS is here! Download it today!

    After months of anticipation, Ohio State PLOTS is available for download for both Apple and Android devices. This app provides an all-in-one tool that can be used to enhance farm management decisions.

    Ohio State PLOTS was created with funding from Field to Faucet, an OSU initiative dedicated to research, education and outreach activities designed to deliver end-to-end solutions to harmful algal blooms and other water quality issues.  The initiative began after the numerous algal blooms that occurred in Lake Erie, causing hundreds of thousands of residents to be without safe drinking water.  Field to Faucet aims to keep farmers productive and profitable, while helping to ensure clean drinking water remains available and plentiful.

    With Ohio State PLOTS, users can create on-farm trials that compare hybrids, fertilizer rates, stand counts, and more.  Available to producers, OSU Extension educators, agronomist and consultants, this intuitive application provides meaningful interpretations of individual trials.

    One advantageous feature of Ohio State PLOTS is the user’s ability to design basic plot layouts which can be saved and/or shared.  Included in the app is a random number generator, which removes human error when developing plot layouts.  In addition to the ability to generate a plot, users can log-in through the app and begin defining an experiment that compares and analyzes various response parameters (yield, hybrids, seed depth, etc.).  A key component of Ohio State PLOTS is how the application statistically analyzes these parameters.  Without having to be a statistician, users can review their comparison means within the Summary Report and make decisions that best fit their farm management strategy.  The Summary Report contains any detailed information the user has entered regarding a specific trial, notes and photos they’ve taken throughout the growing season and all of the statistically analyzed results.  Ohio State PLOTS then allows data to be shared in a Summary Report format to individuals trusted by the user such as a crop consultant, agronomists, or other producers.

    By choosing the sharing functionality within the app, the summary report can be used to discuss management decisions based on the analyses of various forms of crop data.  If a producer chooses not to share their trial information, the data can be stored in the cloud or exported as a .CSV file to be used in programs like Excel or Access.

    As with any farm data, there is always a concern as to how the data is managed and obtained.  A safety feature of Ohio State PLOTS is the log-in access.  All data entered into the app while logged-in is stored and protected in the cloud through Amazon Web Service.  Information can only make its way to agronomists, Extension educators or other producers if a user specifically shares that information.

    We hope that when planning 2017’s crop trials growers will utilize Ohio State PLOTS to compare various treatments within their fields.  Being able to compare treatments allows for growers to take a hard look at what they are actually putting on or growing in their fields.  Reviewing different treatments gives the grower the ability to make meaningful and thoughtful on-farm management decisions. Ohio State PLOTS is available in the App Store and on Google Play.  The app is free and is a great way to help ensure your farm remains productive and profitable, as well as aiding in making smarter choices for cleaner water.  For more information on Ohio State PLOTS, please check out Ohio State Precision Ag’s website at http://fabe.osu.edu/programs/precision-ag/other.  We also welcome comments and suggestions about Ohio State PLOTS to OhioStatePLOTS@gmail.com.

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.


Amanda Bennett (Educator, Agriculture and Natural Resources)
Anne Dorrance (State Specialist, Soybean Diseases)
Bruce Clevenger, CCA (Educator, Agriculture and Natural Resources)
Dennis Riethman (Educator, Agriculture and Natural Resources)
Ed Lentz, CCA (Educator, Agriculture and Natural Resources)
Elizabeth Hawkins (Field Specialist, Agronomic Systems)
Eric Richer, CCA (Educator, Agriculture and Natural Resources)
Glen Arnold, CCA (Field Specialist, Manure Nutrient Management )
Greg LaBarge, CPAg/CCA (Field Specialist, Agronomic Systems)
Jeff Stachler (Educator, 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)
Mark Loux (State Specialist, Weed Science)
Mike Gastier, CCA (Educator, Agriculture and Natural Resources)
Pierce Paul (State Specialist, Corn and Wheat Diseases)
Sam Custer (Educator, Agriculture and Natural Resources)
Sarah Noggle (Educator, Agriculture and Natural Resources)
Steve Culman (State Specialist, Soil Fertility)
Ted Wiseman (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.

CFAES provides research and related educational programs to clientele on a nondiscriminatory basis. For more information, visit cfaesdiversity.osu.edu. For an accessible format of this publication, visit cfaes.osu.edu/accessibility.