Robert Wright - Extension Entomologist

Robert Wright

(faculty)
Work Entomology Hall (ENTO) 213
Lincoln NE 68583-0816
US
Work 402-472-2128 On-campus 2-2128

Faculty Bio
Twitter: @BobWrightUNL

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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Potato leafhopper
Potato leafhopper

Potato Leafhoppers Feeding in Alfalfa Earlier than Normal May 25, 2016

Potato leafhoppers have been reported in alfalfa in southeastern and northeastern Nebraska. This is somewhat earlier than usual and growers should be alert to potential damage and protecting their alfalfa where numbers indicate treatment thresholds would be met.

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alfalfa weevil
Alfalfa weevils can cause serious yield loss in first cutting alfalfa

Scout for Alfalfa and Clover Leaf Weevils May 5, 2016

Guide to identifying and managing alfalfa and clover leaf weevils in alfalfa. While research in northeast Nebraska has shown that clover leaf weevil larva feeding does not cause yield reduction to first cutting alfalfa, alfalfa weevil feeding can cause severe losses to yield and quality of the first cutting. This is why it's important to correctly identify the type of weevil feeding causing damage.

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