Robert Wright - Extension Entomologist

Robert Wright

  • Emeritus Professor University of Nebraska–Lincoln
Work Entomology Hall (ENTO) 213
Lincoln NE 68583-0816
Work 402-472-2128 On campus, dial 2-2128


  • BA, University of California, 1975
  • MS, University of Arizona, 1977
  • Ph D, North Carolina State University, 1981


  • ENTO 888, MS Degree Project, Fall 2018

Faculty Bio
Twitter: @BobWrightUNL

Western bean cutworm feeding in corn
Western bean cutworm feeding in corn

Begin Scouting for Western Bean Cutworm Eggs in Corn

July 8, 2016
The first western bean cutworm moths were captured in University of Nebraska-Lincoln black light traps June 23 at Clay Center, June 27 at North Platte, and June 30 at Scottsbluff. Flights are currently increasing, particularly in North Platte. Scouting should be underway across much of the state.

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Western corn rootworm
Figure 1. Western corn rootworm

Scout for Emerging Western Corn Rootworm Beetles

July 5, 2016
Western corn rootworm beetles began emerging in southeast and south central Nebraska during the last week in June. Beetles typically emerge somewhat later in northeastern and western Nebraska. Scouting should be underway to determine field presence and possible need for treatment.

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Japanese beetle
Japanese beetle

Japanese Beetles Emerging; Identification Key to Management

July 1, 2016
Japanese beetle adults are beginning to emerge in eastern Nebraska and have been reported feeding in corn and soybean. Here's how to differentiate them from the look-alike sand chafers and treatment thresholds to determine when treatment is recommended.

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Young grasshoppers in corn
Immature grasshoppers are being reported feeding in crop fields in eastern Nebraska. Treatment at early growth stages is most effective.

Scout Field Borders for Grasshoppers

June 30, 2016
Populations of immature grasshoppers are being reported in areas bordering crop fields in several parts of eastern Nebraska. If these grasshopper species are one of the four major species that are likely to infest cropland, control may be warranted. Check here are scouting guide and treatment thresholds and recommendations.

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western bean cutworm
western bean cutworm

Using Degree-Days to Predict Western Bean Cutworm Flights

June 24, 2016
Accumulated degree-days offer a proven means for estimating when to scout for insects, including the western bean cutworm. Here's how to estimate insect growth and recommended dates to start scouting for WBC at 14 Nebraska sites.

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First Generation European Corn Borer Scouting & Treatment

June 14, 2016
Growers are noting shot-hole feeding from European corn borer in non-Bt corn. Nebraska Extension offers several resources to monitor moth activity and determine when treatment is necessary.

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Map showing accumulated DD indicating scouting window for common stalk borer

Predicting Stalk Borer Development in Corn

June 13, 2016
Based on accumulated degree days, scouting should be underway across the state for common stalk borer in corn.

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Mature stalk borer larva in corn stalk
Mature stalk borer larva in corn stalk

Stalk Borer Scouting & Management in Corn

June 8, 2016

Common stalk borer eggs have hatched throughout Nebraska and scouting should begin when 1300-1400 degree days have accumulated (Figure 1). This is when larvae start moving into corn and other crops. Stalk borer growth is based on accumulated degree days since January 1, using a base of 41°F.

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