Gary Hein - Director of the Doctor of Plant Health Professional Program

Gary Hein

(faculty)
Work Plant Sciences Hall (PLSH) 279D
Lincoln NE 68583-0933
US
Work 402-472-3345 On-campus 2-3345

Faculty Bio

Severe wheat treak mosaic in Deuel County.
A wheat field with severe wheat treak mosaic in Deuel County. (Photo by Stephen Wegulo)

Risk Factors for Virus Disease Spread and Development in Winter Wheat August 30, 2018

Managing the wheat curl mite is critical in managing the disease risk to winter wheat, particularly in central and western Nebraska. This article outlines key risk factors to manage.

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Screen capture of video demonstrating spread of wheat curl mite

Videos: Controlling the Wheat Curl Mite and Viruses in Winter Wheat August 30, 2018

Four videos illustrate the spread of wheat curl mites among neighboring wheat fields and the importance of controlling these mites to curtail the development of three key viruses of winter wheat in Nebraska.

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Inforgraphic showing how one field can serve as a green bridge for wheat curl mite and multiple viruses to a neighbor's field.

Stopping the Spread of Wheat Streak Mosaic Virus August 20, 2018

For wheat growers, one aspect of being a good neighbor is controlling volunteer wheat after harvest to stop wheat curl mites from moving into the new crop of wheat and transmitting viruses, particularly wheat streak mosaic virus. Volunteer wheat should be controlled in time to provide a two-week break in the green bridge.

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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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Wheat streak mosaic virus in wheat
Severe wheat streak mosaic virus in a wheat field in Deuel County on May 15, 2017. (Photo by Stephen Wegulo)

Why Control of Volunteer Wheat is Critical to Protecting 2018 Yields July 13, 2017

Timely control of volunteer wheat and other weeds is key to managing yield loss risk in your 2018 crop. Yield-limiting risk factors affected by weed control include wheat streak mosaic and other diseases, insects (wheat stem sawfly and disease vectors), moisture loss, and increased weed seed production.

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Severe wheat streak mosaic virus in sunflower stubble

Figure 1. Severe symptoms of wheat streak mosaic in volunteer wheat in sunflower stubble in Deuel County in November 2016. Such a field significantly increases the risk of infection of wheat in nearby fields. (Photo by Gary Hein)

Growers Urged to Keep a Watchful Eye for Wheat Viruses This Spring January 25, 2017

While the mild fall promoted wheat establishment, it also favored survival of wheat curl mites, the leading vector of several viruses common to Nebraska wheat. While much of the state's wheat crop entered winter in very good condition, growers are urged to scout for viruses this spring and assess yield potential of individual fields when making management decisions.

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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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