Jeff Bradshaw - Extension Entomologist

Jeff Bradshaw

faculty
Work
4502 Ave I Scottsbluff NE 69361-4939
US

Faculty Bio
Get to Know Jeff: CW Introductory Article

A field of lodged wheat with an inset photo showing wheat stubs where the wheat stem sawfly overwinters.
Figure 1. Wheat lodging due to wheat stem sawfly. Figure 2 (inset). Wheat stubs remaining in field after sawfly feeding. The sawfly will overwinter in the stub and leave the plant in the spring.

Increased Wheat Stem Sawfly Populations In 2018

August 30, 2018
One of the newest challenges to wheat growers is the wheat stem sawfly, which can girdle stems, causing lodging and yield losses. University research may offer a clue to new control practices.

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Red-legged grasshopper nymph and adult
Red-legged grasshopper nymph and adult

Controlling Grasshoppers in Winter Wheat in the Fall

August 29, 2018
Grasshopper populations may decline in late summer, but remain significant enough to cause serious damage to emerging wheat. Monitor densities in field borders before and after planting.

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Stinking smut (left) and loose smut of winter wheat
Fungal diseases of wheat include stinking smut (left, Figure 1) and loose smut (right, Figure 2). (Photos by Stephen Wegulo)

Should I Plant Treated Wheat Seed?

August 29, 2018
Using clean, certified, treated winter wheat seed optimizes the chances of obtaining high yields. Seed-transmitted diseases and fall insects can reduce grain yield as well as quality next summer.

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Western bean cutworm moth
Figure 1. Western bean cutworm moth (Photos by Julie Peterson)

Scouting and Treating Western Bean Cutworm

July 11, 2018
Western bean cutworm egg masses have been reported on field corn in a number of locations across the state this week. Here's what to look for in the field, treatment thresholds and recommendations.

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Western bean cutworm moth
Western bean cutworm moth

Using Degree-Day Models to Predict Western Bean Cutworm Flights

June 21, 2018
By using a degree-day model, growers can account for the effect of temperature on insect development and approximate when certain insect stages will occur. See predicted cutworm flights and recommended scouting periods for 14 Nebraska locations.

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Wheat stem sawfly video screen capture

Wheat Stem Sawfly Numbers Up in the Panhandle

June 6, 2018
Video: Populations of wheat stem sawflies, a serious pest of wheat in western Nebraska, are at high numbers this year. Surveys are underway in wheat fields, grasslands and pastures to evaluate grass hosts for the pest and its parasitoids.

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Alfalfa weevil larvae and adults
Figure 1. Alfalfa weevil larvae and adults collected in a single 12-sweep sample in Goshen County, Wyoming by Dan Keener on May 11, 2018. Note that both large larvae and adults are present.

Scout Diligently for Alfalfa Weevils in May And June

May 16, 2018
High populations of alfalfa weevils have been found in alfalfa throughout the Nebraska Panhandle; lower populations were reported this week in central and eastern Nebraska. The economics would warrant continued scouting through June to provide for timely treatment, if necessary, and yield protection.

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Painted lady butterfly and caterpillar

Large Populations of Painted Lady Butterflies

January 8, 2018
In 2017 large populations of painted lady butterflies were seen across the state, raising concerns about whether the larvae form (thistle caterpillars) of this insect would cause damage to soybean fields. An article from the Proceedings of the 2018 Nebraska Extension Crop Production Clinics.

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