Stephen Wegulo - Extension Plant Pathologist

Stephen Wegulo

faculty
Work Plant Sciences Hall (PLSH) 406H
Lincoln NE 68583-0722
US
Work 402-472-8735 On campus, dial 2-8735

Faculty Bio
Website: Wheat Disease section of CropWatch Plant Disease Management
Twitter: @wegulo2

A typical wheat field in Nebraska early in the growing season.
Figure 1. A typical wheat field in Nebraska early in the growing season.

It's Time to Scout for Wheat Diseases

April 19, 2018
With the predicted return to more normal temperatures, it's time to get into wheat fields and start scouting. Stripe rust has already been reported in southeastern Kansas and is expected to move northward. Included is a table of fungicide efficacy ratings for disease management in wheat.

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Fungicides are for Fungi

January 8, 2018
Symptoms of bacterial diseases can be easily confused with those of fungal diseases in field crops. This article, from the Proceedings of the 2018 Nebraska Extension Crop Production Clinics, reviews some of the common mistakes made in the major field crops and reviews research on the impact of fungicide use after hail events in corn and soybean.

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Stripe rust ina field of wheat

Wheat Disease Update: Wheat Streak Mosaic and Stripe Rust

January 8, 2018
From the 2018 Crop Production Clinic Proceedings, this wheat disease update focuses on wheat streak mosaic virus and stripe rust.

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Tan spot in wheat

Risk Factors and Management Recommendations for Wheat Diseases in Nebraska

August 30, 2017
What factors contribute to diseases in wheat and what management steps can help deter wheat disease problems. Also addressed is how to use integrated pest management to reduce threats that could rob yields.

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Wheat field with stripe rust
Figure 1. Stripe rust in a grower's winter wheat field in Kimball County in June 2015. Taking steps now before planting can help reduce disease impact for your 2018 crop. (Photo by Stephen Wegulo)

5 Pre-Planting Steps to Reduce Disease Problems in Wheat

August 28, 2017
Before planting winter wheat this fall growers have an opportunity to address and manage several factors that could lead to reduced yields in 2018. Here are five steps to take.

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Severe wheat streak mosaic
Figure 1. Severe wheat streak mosaic in a grower’s field in Jefferson County on June 1. (Photo by Stephen Wegulo)

Protect Future Wheat Yields: Control the Volunteer Green Bridge

August 2, 2017
Wheat streak mosaic virus (WSMV) problems have been extensive throughout the western Great Plains this year, significantly reducing the yield potential of many fields. A critical key in managing this threat in the next crop is elimination of volunteer wheat. Tillage or chemical weed control should occur at least one month before planting to allow host plants time to dry up and cease being a host.

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Bunted wheat and loose smut of wheat.
Figure 1 (left). Bunted wheat grain containing spore masses of the stinking smut fungi. Figure 2 (right). Loose smut on a wheat head.

The Importance of Certified, Fungicide-Treated Wheat Seed

July 31, 2017
Planting clean, certified, fungicide-treated wheat seed is one of the first steps in assuring top yields from your 2018 wheat crop. Another is selecting resistant varieties, where available. Together these practices can help you more effectively manage seed-transmitted diseases of wheat.

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Figure 1.  A stripe rust susceptible (left) and resistant variety in a state variety trial in southeast Nebraska on June 3.
Figure 1. A stripe rust susceptible (left) and resistant variety in a state variety trial in southeast Nebraska on June 3.

2017 Stripe Rust Ratings from Eastern Nebraska Wheat Variety Trials

July 14, 2017
This year the onset of stripe rust was earlier in eastern Nebraska than in western Nebraska, allowing it to develop to levels that could be scored in state variety trials in Washington, Saunders, and Clay counties. A table provides ratings for a number of varieties and lines at three sites.

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