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

Wheat field in Saline County at heading
Figure 1. A wheat field in Saline County at the heading growth stage with no diseases on May 23. (Photos by Stephen Wegulo)

Wheat Disease Update: Southeast Nebraska May 24, 2018

A survey of wheat in southeast Nebraska found diseases generally absent or at very low levels, mainly due to recent dry conditions. Continued scouting for foliar diseases is recommended, especially in areas that receive rainfall and where the wheat crop has not yet headed.

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Wheat field 5/17/18
Figure 1. A healthy-looking wheat field in Box Butte County in the northern Panhandle on May 17. (Photos by Stephen Wegulo)

Wheat Disease Update May 18, 2018

A survey of wheat fields in central, southwest, and Panhandle regions of Nebraska found little disease. In addition recent rains have helped alleviate moisture stress.

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Wheat field exhibiting symptoms of sulfur deficiency.
Figure 1. Areas of yellow wheat on slopes in a field in Nuckolls County on April 27, 2010, typical of sulfur deficiency.

Addendum to May 11 Wheat Disease Update May 14, 2018

To differentiate sulfur deficiency from nitrogen deficiency in wheat, look for field patterns. Symptoms of yellowing limited to certain areas is more typical of sulfur deficiency. In addition, symptoms of sulfur deficiency are more conspicuous when soil temperatures are cold as in early spring.

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Healthy field of wheat
Figure 1. A disease-free irrigated wheat field in Nuckolls County on May 9. (Photos by Stephen Wegulo)

Wheat Disease Update May 11, 2018

No diseases were found during a survey of wheat fields in south central and southeast Nebraska this week, but growers are urged to continue scouting as recent rains may create conditions favorable to disease development.

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Fungicides are for Fungi April 24, 2018

Management of foliar fungal disease is achieved in many of our field crops by applying fungicides. Over the past several years, there have been examples of misidentification of some bacterial diseases that are easily confused for fungal diseases in field crops.

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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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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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