C.O.R.N. Newsletter : 2018-36

  1. Brief Break from Wet Weather Continues before More Wet Weather Returns

    Author(s): Jim Noel

    We have had a few weeks of colder and drier overall weather after the very warm start to October. We expect dry weather through this Thursday except for a few lake effect showers in northeast Ohio about the middle of the week.

    Then the pattern will change. Temperatures will likely remain chilly for the rest of the month but we will gradually wet up again. This week will be the best conditions for harvest or any planting of wheat still needed. We expect some showers to return from Friday into early next week with a more potent system later next week. There could be a few snowflakes mixed in this weekend but with marginal temperatures and the warm Lake Erie, it should be mainly rain showers.

    Also, northeast Ohio remains somewhat protected from a hard freeze right now with a warm Lake Erie and preferred northwest winds.

    The outlook for November calls for near normal temperatures and above normal precipitation.

    The outlook for December calls for near normal temperatures and above normal precipitation.

    Looking further ahead, a minor El Nino is forecast for this winter but confidence in the details is rather low. This leads to low to moderate confidence in the outlooks. Right now winter is shaping up to be near normal temperatures and slightly below normal precipitation. Looking into next spring for planting season it looks like below normal temperatures and above normal rainfall.

    For the next two weeks, rainfall will increase to to 1-2 inches. Normal is 1-1.25 inches for two weeks on average, see attached NOAA/NWS/Ohio River Center Rainfall map. You can see this map updated all the time by visiting the OHRFC briefing pages at  https://www.weather.gov/ohrfc/Briefings . The briefing pages include our flood, drought and seasonal briefings.


  2. 2018 Ohio Soybean Performance Trials - Marion County and South Region Results Available

    Author(s): Laura Lindsey

    Results from Marion County have been added to the 2018 Ohio Soybean Performance Trials pdf: https://stepupsoy.osu.edu/soybean-production/variety-selection/ohio-soybean-performance-trial

    In Marion County, the early soybean trial (2.5-3.3 RM) yielded 37.3-68.1 bu/acre (average of 57.2 bu/acre). The late soybean trial (3.4-4.1 RM) yielded 41.4-66.7 bu/acre (average of 56.1 bu/acre).

    Results will be available for the north region and Mercer County as the trials are harvested and data are analyzed.

  3. Properly Winterizing Sprayers Can Help Mitigate Costly Problems Next Spring

    Author(s): Erdal Ozkan

    This is a busy time of year for many farmers, but taking time to winterize your sprayer now can payoff in avoiding problems next spring.  Without proper winterizing before the temperature falls below freezing, you could end up with a pump that is cracked and/or not working at its full capacity.  Here are some important things you need to do with your sprayer this time of the year.


     Make sure to rinse the whole sprayer thoroughly before storing. Rinsing the sprayer thoroughly after each use reduces likelihood of cross-contamination of products applied next spring. Insufficient rinsing may also result in clogged nozzles. Once the nozzles are clogged, it is extremely difficult to bring them back to their normal operating conditions. Leaving chemical residues in nozzles will usually lead to changes in their flow rates, as well as in their spray patterns resulting in uneven distribution of chemicals on the target.

    Depending on the tank, proper rinsing of the interior of the tank can be challenging.  Rinsing is easy if the tank is relatively new and equipped with special rinsing nozzles and mechanisms inside the tank. If this is not the case, manual rinsing of the tank interior is more difficult, and poses some safety problems such as inhaling fumes of leftover chemicals during the rinsing process. To avoid these problems, either replace the tank with one that has the interior rinse nozzles, or install an interior tank rinse system in your existing tank.

    For effective rinsing of all the sprayer components, circulate clean water through the whole sprayer for several minutes with the nozzles off, then flush out the rinsate through the nozzles. Rinsing should be done in the field, or on a concrete chemical mixing/loading pad with a sump to recover rinse water. Dispose of the rinsate according to on the directions on the labels of the pesticides in the tank. Always check the label for specific instructions. Most labels recommend following procedure: If rinsing is done on a concrete rinse pad with a sump, put the rinsate collected in the sump back in the tank, dilute it with water and spray it in the field where there is no potential for the rinsate to reach ditches and other water bodies nearby. If the rinsing is done in the field, make sure you are not flushing out the rinsate in the system in one area. It is best to further dilute the rinse water in the tank and, spray it on the field on areas where there is no potential for the rinsate to reach ditches and other water bodies nearby.


    Rinsing the system with water as explained above may not be sufficient to get rid of chemicals from the sprayer. This may lead to cross-contamination problems. Residues of some pesticides left in the sprayer may cause serious problems when a spray mixture containing these residual materials is applied on a crop that is highly sensitive to that pesticide. To avoid such problems, it is best to clean and rinse the entire spraying system with cleaning solution. A mixture of 1 to 100 of household ammonia to water should be adequate for cleaning the tank, but you may first need to clean the tank with a mixture containing detergent if tank was not cleaned right after the last spraying job was done. Some chemicals require specific rinsing solution. The Univeristy of Missouri has a publication listing commonly used pesticides and the specific rinsing solutions required of each, available online here:  http://extension.missouri.edu/p/G4852. Always check the product label to find out the most recent recommendations on cleaning agents.

    Cleaning the outside of the sprayer components deserves equal attention. Remove compacted deposits with a bristle brush. Then flush the exterior parts of the equipment with water. A high pressure washer can be used, if available. Wash the exterior of the equipment either in the field away from ditches and water sources nearby, or a specially constructed concrete rinse pad with a sump. Again, the rinsate should be disposed of according to the label recommendationsMost labels recommend the following practice: put the rinsate collected in the sump back in the tank, dilute it with water and spray it in the field where there is no potential for the rinsate to reach ditches and other water bodies nearby.


    To prevent freezing, check one more time to make sure there is no liquid left inside any of the sprayer parts. The pump, the heart of a sprayer, requires special care. After draining the water, add a small amount of oil, and rotate the pump four or five revolutions by hand to completely coat interior surfaces.  Make sure that this oil is not going to damage rubber rollers in a roller pump or rubber parts in a diaphragm pump. Check the operator's manual. If oil is not recommended, pouring one tablespoon of radiator rust inhibitor in the inlet and outlet part of the pump also keeps the pump from corroding. Another alternative is to put automotive antifreeze with rust inhibitor in the pump and other sprayer parts. This also protects against corrosion and prevents freezing in case all the water is not drained. To prevent corrosion, remove nozzle tips and strainers, dry them, and store them in a dry place. Putting them in a can of light oil such as diesel fuel or kerosene is another option.


    Find ways to protect your sprayer against the harmful effects of snow, rain, sun, and strong winds. Moisture in the air, whether from snow, rain, or soil, rusts metal parts of unpro­tected equipment of any kind. While the sun usually helps reduce moisture in the air, it also causes damage. Ultraviolet light softens and weakens rubber materials such as hoses and tires, and degrades some tank materials. The best protection from the environment is to store sprayers in a dry building. If storing in a building is not possible, try covering the sprayer with some material that will protect it from sun, rain and snow. When storing trailer-type sprayers, put blocks under the frame or axle and reduce tire pressure during storage.

    Finally, check the condition of all sprayer parts one more time before leaving the sprayer behind. Identify the parts that may need to be worked on, or replaced. Check the tank and hoses to make sure there are no signs of cracks. Check the painted parts of the sprayer for scratched spots. Touch up these areas with paint to eliminate corrosion. Don’t forget to cover openings so that birds don’t make a nest somewhere in your sprayer, and insects, dirt, and other foreign material cannot get into the system.

    Erdal Ozkan, Professor and Extension Agricultural engineer, can be reached at 614-292-3006, or ozkan.2@osu.edu.

  4. Register for the Ohio Certified Crop Adviser Pre-Exam Class

    The Certified Crop Adviser (CCA) Exam Training program, sponsored and delivered by the OSU Agronomic Crops Team, will be offered at the Shelby County Extension Office, Sidney, Ohio on January 9 & 10, 2019 beginning at 9:00 a.m. on the 9th and adjourn by 5:00 p.m. on the 10th. 

    The price for the Pre-Exam preparation class is $250. Secure on-line registration via credit card, debit card or check is available at: http://go.osu.edu/Reg2019class.

    Register early; due to class interaction, we keep it small. This is an intensive two-day program somewhat directed toward the local exam – to be used as a reminder on what best to study in preparation for the CCA exams.

    What we cover in the class:

    Nutrient Management Concepts

    - Soil pH and Liming

    - Primary Nutrients

    - Secondary Nutrients


    - Micronutrients

    - CEC

    - Nutrient deficiencies

    Soil and Water Management

    - Soil Properties

    - Soil Water


    - Surface and Ground Water

    - Soil & Wind Erosion

    Pest Management

    - Weeds

    - Insects


    - Diseases

    Fertilizer & Pesticide Math

    Crop Management

    - Crop Production

    - Photosynthesis


    - Crop Physiology

    - Variety Selection

    Course contact:

    Harold Watters, CPAg/CCA
    Ohio State University Extension
    1100 S. Detroit St
    Bellefontaine, OH 43311
    Phone 937 604-2415 cell, or by email: watters.35@osu.edu for more information.

    We will provide at the program on January 9 & 10 the following publications in addition to lectures:

    • The new Ohio Agronomy Guide
    • Ohio, Indiana & Illinois Weed Control Guide
    • Corn, Soybean, Wheat and Alfalfa Field Guide or equivalent
    • Tri-State Fertilizer Recommendations and
    • Modern Corn & Soybean Production
    • Q & A, practice questions, and many handouts

    Meals, snacks, drinks will also be provided at the site during the class.

    Not covered directly in the class is the international exam. We recommend this very good study resource for the international exam, “Preparing for the International CCA Exam” available for purchase from IPNI. The 2018 edition is available: https://store.ipni.net/products/preparing-for-the-internationalcertified.... This guide is divided into the four categories of the exam: Nutrient Management, Crop Management, Pest Management, Soil/Water Management with subject matter and questions/answers at the end of each chapter. This manual is an excellent study guide for the International Exam.

    For more information on the Certified Crop Adviser program see http://certifiedcropadviser.org

    There are four steps to certification; the steps below are simply an overview of the process of becoming a CCA. Anyone interested in becoming certified is encouraged to review the detailed documentation in the Credential Information Workbook before starting the process. The steps to certification are:

    1.  Pass two comprehensive exams (International and Local Board). CCA exams will be given twice in 2019, the first Friday in February and in August. Register for the February exam at http://www.certifiedcropadviser.org/exams, at least six weeks before the next exam on February 1st.

    2.  Meet the experience requirements

    • Have at least two years of experience with at least a Bachelor of Science Degree in an agronomy related field, (the number of CCAs with at least a Bachelor of Science Degree is greater than 70%).
    • Have at least three years of experience with an Associates Degree in an agronomy related field,
    • Or have at least four years of experience with no degree.

    3.  Apply for the CCA Credential.

    4. Document education and crop advising experience (including transcripts and supporting references). Sign and agree to uphold the CCA Code of Ethics (included in application).

    Once Certified you must earn 40 hours of continuing education (CEU) every two years and pay an annual renewal fee.

    Already a CCA and want to up your value?

    Current CCAs can take additional exams to show their specialization. You must already be a CCA but can sit for one of the specialty exams at the same time the regular exams are given.

    Specialty Certifications https://www.certifiedcropadviser.org/exams

    • Precision Agriculture Specialty (PASp) Certification
    • Resistance Management Specialty (RMS) Certification
    • Sustainability Specialty (SSp) Certification
    • 4R Nutrient Management Specialty (4R NMS) Certification

    One other specialization that doesn’t require a further exam beyond the CCA is the CPAg – Certified Professional Agronomist. This requires documenting more years of experience than the CCA, and an agronomy degree with strong education in both crops and soils. See the Certified Crop Adviser website for more information: https://www.certifiedcropadviser.org/cpag.

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)
Amanda Douridas (Educator, Agriculture and Natural Resources)
Bruce Clevenger, CCA (Educator, Agriculture and Natural Resources)
Clifton Martin, CCA (Educator, Agriculture and Natural Resources)
Dean Kreager (Educator, Agriculture and Natural Resources)
Dennis Riethman (Educator, Agriculture and Natural Resources)
Elizabeth Hawkins (Field Specialist, Agronomic Systems)
Eric Richer, CCA (Educator, Agriculture and Natural Resources)
Garth Ruff (Educator, Agriculture and Natural Resources)
Glen Arnold, CCA (Field Specialist, Manure Nutrient Management )
Greg LaBarge, CPAg/CCA (Field Specialist, Agronomic Systems)
Harold Watters, CPAg/CCA (Field Specialist, Agronomic Systems)
Jeff Stachler (Educator, Agriculture and Natural Resources)
Jim Noel (National Weather Service)
Lee Beers, CCA (Educator, Agriculture and Natural Resources)
Les Ober, CCA (Educator, Agriculture and Natural Resources)
Mark Badertscher (Educator, Agriculture and Natural Resources)
Peter Thomison (State Specialist, Corn Production)
Sam Custer (Educator, Agriculture and Natural Resources)
Sarah Noggle (Educator, Agriculture and Natural Resources)
Ted Wiseman (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.