Wayne Ohnesorg - Extension Educator

Wayne Ohnesorg

1305 S 13th St Norfolk NE 68701-6655
Work 402-370-4044 On campus, dial 7-4044


  • Ph D, University of Nebraska-Lincoln, 2016
  • MS, Iowa State University, 2008
  • BS, University of Wyoming, 2005

icon-bookmark-starAwards & Honors

  • Achievement Award, National Association of County Agricultural Agents, 2017
  • Entomology Educational Project Award, North Central Branch of the Entomological Society of America, 2017
  • #1 Agriculture App for 2012, CropLife, 2012

Location: Madison County
Focus Areas: Entomology, integrated pest management (IPM), mobile scouting tools for agriculture, and mobile apps.

Laptop in field

Private Pesticide Training Offered by Zoom for 2023

January 19, 2023
Zoom training sessions will focus on pesticides for corn and soybean on March 8 and April 4, and for pastures on March 21.

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Drought-affected field
This year's program will assist producers with making decisions for the 2023 growing season, as well as renewing their private pesticide applicator licenses.

Confronting Cropping Challenges Program to be Offered in November and December 2022

November 8, 2022
This year's program will provide growers with extension insights on corn tar spot, drift management and drought-related considerations such as irrigation, and herbicide and nutrient carryover.

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Tractor spraying field

Private Pesticide Training Offered by Zoom for 2022

March 9, 2022
Nebraska Extension will be offering five private pesticide applicator trainings via Zoom in March and April. Each one will have a different agricultural area of focus, including alfalfa, corn, soybean, pasture and wheat.

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Program flier

Confronting Cropping Challenges Program to be Offered in December 2021

November 17, 2021
The fifth annual Confronting Cropping Challenges program will highlight cropping issues for northeast Nebraska producers throughout 2021, such as fall armyworms and tar spot.

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Private Pesticide Training Offered by Zoom

February 4, 2021
Northeastern and Northcentral Nebraska residents have several options for private pesticide applicator training sessions throughout March and April.

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Soybean aphid

Although at Low Levels, Soybean Aphids Are in Northeast Nebraska

July 15, 2020
The infestations appear to have occurred recently, as the aphids were only observed on leaves that had not yet expanded completely. The economic threshold for late vegetative through R5 stage soybeans is 250 aphids per plant with 80% of the plants infested and populations increasing.

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aphid speed scouting app

Soybean Aphid Scouting and Management

July 15, 2020
The current economic threshold for soybean aphids is 250 aphids per plant with 80% of the plant infested and populations increasing. The article discusses the basis for this threshold and two scouting methods, including a speed scouting app, and management guidelines.

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Card promoting the Confronting Cropping Challenges meetings

Confront Crop Challenges and Update Applicator Certification

November 27, 2018
Confronting Crop Challenges will be the focus of five meetings to be held in northeast Nebraska this December. Each offers updates on recent crop and pest issues in eastern Nebraska as well as pesticide applicator recertification training.

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