Robert Wright - Extension Entomologist

Robert Wright

Faculty Bio
Twitter: @BobWrightUNL

Corn rootworm beetle

Impact of Planting Dates on Corn and Soybean Insects July 18, 2019

The wide range in corn and soybean planting dates in Nebraska this year may affect the distribution and behavior of pest insects both this year and next year. Be alert to a possible shift and scout regularly to identify problem fields.

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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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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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Green June beetle
Green June beetle

Help Identify Crop Insect Distribution in Nebraska July 8, 2019

Have you seen these three insects in your fields? They are expanding their geographic range in Nebraska and we would like to identify where they can currently be found.

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Soybean gall midge larvae inside a soybean stem
Soybean gall midge larvae inside a soybean stem

Soybean Gall Midge Larvae Found in Soybean Plants June 29, 2019

In Nebraska, soybean gall midge larval injury to soybean has been found in most areas where adult soybean gall midge activity occurred over the past two weeks It is unlikely foliar insecticides will affect this insect.

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