Justin McMechan - Crop Protection and Cropping Systems Specialist

Five-state map showing counties with confirmed infestations of soybean gall midge

Mid-Season Update on Soybean Gall Midge

August 7, 2019
Soybean gall midge infestations have been confirmed in six new Nebraska counties since 2018.Treatment is not recommended at this time, but scouting and reporting infestations will continue to be important to plan for management next year.

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Tweet from Justin McMechan on scouting for soybean gall midge

Extension Crop and Pest Reports (July 29 - Aug. 2)

August 1, 2019
Crop reports from Extension Educators and specialists from across the state, including videos and Tweets.

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Adult differential grasshopper

Grasshoppers Return ― It’s Time to Scout Field Borders

July 18, 2019
Populations of immature grasshoppers are being reported in areas bordering crop fields in several parts of Nebraska. If these grasshopper species are one of the four major species that are likely to infest cropland, control may be warranted if high numbers are present.

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Counties documented as infested in 2018 (red) and 2019 (orange).
Figure 2. Counties documented as infested in 2018 (red) and 2019 (orange).

Soybean Gall Midge Adults Emerge from this Year’s Soybean Fields

July 17, 2019
A significant number of soybean gall midge adults have been collected from this year’s soybean fields in east-central and northeast Nebraska. Dead and dying plants have been observed near infested sites in both northeast and east central Nebraska.

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Figure 1. Figure 1. The wheat-mite-virus complex has extreme potential to impact yield the following year if high risk volunteer wheat situations are not managed well
Figure 1. Figure 1. The wheat-mite-virus complex has extreme potential to impact yield the following year if high risk volunteer wheat situations are not managed well. (Photo by Gary Hein)

Why Control of Volunteer Wheat is Critical to Protecting 2020 Yields

July 12, 2019
Volunteer wheat can create a "green bridge," providing a route for mites to move to and infest emerging wheat. These mites can then transmit wheat streak mosaic virus, High Plains virus, and Triticum mosaic virus, or all of them to create a complex of infections.

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Painted lady butterfly
Figure 1. Painted lady butterly (Photo by Jim Kalisch)

Painted Lady Butterflies Are Abundant In Many Areas—What Now?

July 10, 2019
Treatment is not recommended for the painted lady butterfly currently being seen in high numbers and could endanger beneficial insects. Treatment thresholds offer guidance for treating feeding caterpillars.

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Western corn rootworm beetle feeding on a leaf of corn

Western Corn Rootworm Beetles Emerging, Time to Scout

July 9, 2019
Western corn rootworm beetles began emerging in southeast and south central Nebraska and will feed on corn leaves until silks, their favored food, emerge. Beetles will emerge somewhat later in northeast and western Nebraska.

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Figure 1. Soybean plant showing signs of wilting from soybean gall midge infestation.
Figure 1. Soybean plant showing signs of wilting from soybean gall midge infestation. (Photo by Justin McMechan)

Soybean Gall Midge: New Counties Infested and Second Generation Adults Emerging

July 8, 2019
Since June 30, low levels of adult emergence have been observed from east-central and northeast Nebraska counties from last year’s soybean fields. On July 2 and July 4 adults were found emerging from this year's soybeans in east-central Nebraska.

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