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 2-8735

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

A number of diseases were reported in wheat this fall, indicating the potential for increased diseases next spring. The author outlines a comprehensive strategy to tackle the challenge, starting this winter.
A number of diseases were reported in wheat this fall, indicating the potential for increased diseases next spring. The author outlines a comprehensive strategy to tackle the challenge, starting this winter.

Wheat Disease Management Tips for 2017 December 9, 2016

A number of diseases were reported in Nebraska wheat this fall. In this article plant pathologist Stephen Wegulo outlines how to develop a comprehensive plan to tackle this yield challenge, starting with steps growers can take this winter.

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Fall occurrence of stripe rust in wheat
Fall occurrence of stripe rust in wheat

Stripe, Stem, and Leaf Rust in Fall-Planted Wheat November 11, 2016

Stripe rust, leaf rust, and stem rust have been identified in fall planted wheat in Nebraska, extending into areas where it had previously not developed in the fall. Plant Pathologist Stephen Wegulo looks at the outbreak, conditions contributing to rust development this fall, and the economic and management issues.

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Figure 1.  Stripe rust on a flag leaf in a grower’s field in south central Nebraska in 2016
Figure 1. Stripe rust on a flag leaf in a grower’s field in south central Nebraska in 2016
Wheat streak mosaic
Wheat streak mosaic

Control Volunteer Winter Wheat and Other Weeds Now to Increase and Protect 2017 Yields, Income June 23, 2016

By far, the greatest risk of losses from mite-vectored viruses occurs when there is a summer "green bridge" of volunteer wheat emerging before harvest. This almost always occurs as a result of wheat seed head shatter from hail storms (Figure 1).

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Wheat leaf rust
Wheat leaf rust

Wheat Disease Update June 10, 2016

A survey of wheat research plots in east central Nebraska found a variety of diseases, including severe rust on wheat and barley.

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Wheat stripe rust
Figure 1. A flag leaf completely covered with stripe rust in a grower’s field in Nuckolls County on May 25.

Stripe Rust Increasing; Spray Your Wheat to Protect the Flag Leaf June 2, 2016

Stripe rust has significantly increased in all wheat-growing areas in Nebraska. It is recommended that wheat be treated with a fungicide to protect the flag leaf. If the incidence (percentage of flag leaves diseased) or severity (percentage of the flag leaf area diseased) is less than 50%, spraying a fungicide will significantly reduce yield loss due to stripe rust.

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Severe stripe rust in wheat
Severe stripe rust in wheat

Wheat Disease Update - Late May May 26, 2016

A survey of wheat fields in southeast and south central Nebraska this week found most fields looking healthy with little or no disease. Fungal and virus diseases were found at varying levels in some fields. Depending on growth stage and disease present, fungicides may still be beneficial.

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Barley yellow dwarf disease in wheat
Barley yellow dwarf disease in wheat

Head Diseases, Barley Yellow Dwarf in Wheat May 19, 2016

With wheat headed or flowering in southeast and south central Nebraska, head diseases are starting to appear, including Fusarium head blight, loose smut, white mold (scab) and barley yellow dwarf. Wheat stem maggots were also causing damage.

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