C.O.R.N. Newsletter: 2025-22

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.

Corn Vomitoxin Management Critical Considerations at Tassel

Author(s): Jason Hartschuh, CCA, Stephanie Karhoff, CCA, Pierce Paul, Cristiano Nesi
Mycotoxins, specifically deoxynivalenol (DON), commonly referred to as vomitoxin, has become a significant problem for Ohio corn growers. What was once considered an every-ten-year problem, has now become a yearly challenge in some sections of the state. DON contamination of grain is associated with Gibberella ear rot (GER), a disease caused by the fungus Fusarium graminearum. The Ohio State University Cereal Pathology Lab led by Dr.
Have you registered for the August 20th Ditch the Runoff Field Day?

Author(s): Amber Emmons, CCA
We are five weeks away from Ohio State University Extension’s Water Quality Team field day: Ditch the Runoff! This is their third annual conservation-focused field day. This year's event will showcase a newly completed two-stage ditch in Williams County, Ohio. Guest speakers will include Greg LaBarge (Ohio State Extension), Dr.
How to Use the Crop Risk Tool

Author(s): Stephanie Karhoff, CCA, Jason Hartschuh, CCA, Pierce Paul
Unfortunately, there is no crystal ball that can reveal what impact disease will have on your farm. However, you can take advantage of the new web-based Crop Risk Tool hosted by the Crop Protection Network to assess disease risk.
Reminder: Grain Handling Systems Open House!

Author(s): Amanda Douridas, CCA
Register today to secure your spot at the Molly Caren Ag Center Grain Facility for an open house to learn more about grain handling systems and safety. Technology and design will be on display July 24, 2025 from 11-2pm. OSU Extension and industry representatives will be on hand to discuss Millwright design and efficiencies, grain automation, harvest equipment, grain scale and software, and safety.
The North American Manure Expo coming on July 30th and 31st in Wauseon, Ohio

Author(s): Glen Arnold, CCA
The North American Manure Expo is coming to Wauseon Ohio on July 30th and 31st at the Fulton County Fairgrounds. This event will showcase research, innovation, and solutions found within manure management. The event brings manure haulers, applicators, brokers, nutrient management specialists, researchers, producers, manufacturers, custom operators and extension personnel together for two days of learning, networking and evaluation of new technology, research, equipment and opportunities.
NE Ohio Hay Day Hosted by OSU Extension and Norden MFG

Author(s): Lee Beers, CCA, Les Ober, CCA
Join OSU Extension and Norden MFG on August 2, 2025, for the NE Ohio Hay Day. Held at Norden MFG, 4210 Kinsman Rd NW, North Bloomfield Ohio 44450. The program will start at 10:00 AM and will conclude at 1:00 PM. This program is free thanks to generous support from Norden MFG, the Trumbull County Holstein Club, and the Hertzer Family Trust.
Battle for the Belt: Season 3, Episode 16 – Tar Spot in Corn

Author(s): Taylor Dill, Maria Kessler, Diego Miranda, Laura Lindsey, Osler Ortez, Stephanie Karhoff, CCA
Season 3, Episode 16 of Battle for the Belt is now available: https://www.youtube.com/watch?v=QIx3GTm5L44
Lep Monitoring Network – Western Bean Cutworm numbers are on the rise #12

Author(s): Evan Hodkinson, Rosalind Holt-Frank, Trevor Mullen, Amy Raudenbush, Sarah Noggle, Garth McDorman, Nic Baumer, Frank Becker, JD Bethel, Trevor Corboy, Nick Eckel, Mary Jo Hassen, Ed Lentz, CCA, Kendall Lovejoy, Clifton Martin, CCA, Mike Sunderman, Jordan Penrose, Beth Scheckelhoff, Don Hammersmith, Frank Thayer, Kyle Verhoff, Jacob Winters, Curtis Young, CCA, Andy Michel, Kelley Tilmon
This is our 12th week of monitoring moth pests in Ohio. Between July 7th and July 13th, we continued to monitor Corn Earworm (CEW) and Western Bean Cutworm (WBC). Over the past week, the state of Ohio experienced mild rainfall and average temperatures (75.9 °F), which may have led to an increase in WBC activity. The statewide averages for CEW remained low. Please read below for more details.
Statewide Slug Monitoring Project – Update #9

Author(s): Evan Hodkinson, Rosalind Holt-Frank, Trevor Mullen, Amy Raudenbush, Pressley Buurma, Ken Ford, Seth Kannberg, Alan Leininger, Gigi Neal, Kelley Tilmon
Our ninth (and final) slug update for the season and it covers monitoring from July 7th to July 13th. During this time, there were 6 counties that monitored a total of 36 shingle traps. Slug counts were similar to last week, and the average slug count per county was 0.8. The highest average slug count was 4.6 slugs in Seneca County, which has had higher slug averages in the past weeks. Slug shingle monitoring ranged over 9 weeks (3 weeks before plant and 6 weeks after plant).