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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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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Disease Reports from the UNL Diagnostic Clinic July 12, 2019

Phytophthora root and stem rot in soybeans and bacterial leaf streak and common rust in corn were among the most common diseases reported in the last two weeks by the UNL Plant and Pest Diagnostic Clinic.

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A flooded field
Figure 1. Crop fields in a large area of south central Nebraska were flooded this week after heavy rains, causing growers to rexamine their options for fields already late-planted or taken as prevented-planting. (Photos by Sarah SIvits)

Crop Impacts and Options After Mid-Season Flooding July 12, 2019

Earlier this week south-central and central Nebraska were hit by heavy rains leading to flooding. Now farmers are asking: How long will the crop survive in standing water and what does this mean for the rest of the growing season?

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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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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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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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Japanese beetle

Japanese Beetles Emerging; Scout Corn and Soybean Fields June 27, 2019

Japanese beetle adults are beginning to emerge in eastern Nebraska corn and soybeans, as well as landscape trees and shrubs. They will continue to emerge for the next few weeks. This story includes a guide for estimating total defoliation from multiple insects to determine need for treatment in soybean.

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