Insect Management

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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Differential grasshopper
Figure 1. The differential grasshopper, one of four grasshopper species in Nebraska that feed on crops. The others are the twostriped, redlegged, and migratory grasshoppers.

Grasshopper Control Most Effective Early Season

June 12, 2018
Heavy populations of immature grasshoppers were found in field borders in south central Nebraska corn fields this week. Scout and if numbers warrant, treat now when they're small and concentrated in borders. See story for identification tips, treatment thresholds, and control recommendations.

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European corn borer "shot-hole" damge to corn leaves

Scouting and Treatment of First Generation European Corn Borer

June 12, 2018
While European corn borer numbers have greatly decreased regionally since the introduction of the first Bt corns, local populations may still cause damage on untraited corn such as popcorn or white corn or in field planted to non-BT corn to take advantage of lower seed costs. These fields should be scouted now.

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burrower bug nymphs

Burrower Bugs in Soybeans

June 12, 2018
White-margined burrower bugs will move to nearby crop plants to feed when their preferred host plants are terminated, but they typically don't cause economic damage to crops.

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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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Insect light trap

Insect Light Trap Data Available for 3 Sites

June 6, 2018
UNL Extension Entomology is monitoring crop insect pests (primarily moths) using black light traps at the Haskell Ag Laboratory near Concord, the South Central Ag Laboratory near Clay Center, and the West Central Research and Extension Center near North Platte.

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wireworm

Scout Emerging Corn for Insects; Don't Take Protection for Granted

May 16, 2018
As corn begins to emerge, be alert to the potential for damage from early season insects such as cutworms, wireworms, white grubs or wheat stem maggot. Seed treatments provide some protection, but can be overwhelmed in some circumstances, allowing losses.

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Life cycle of the black grass bug in western Nebraska

Scouting Recommended in Wheatgrass for Black Grass Bugs

April 27, 2018
In western Nebraska when wheatgrass, especially crested wheatgrass, starts growing, it’s time to begin monitoring for black grass bugs. Feeding damage caused by these insects can substantially reduce wheatgrass forage production.

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