Robert Wright - Extension Entomologist

Robert Wright

Faculty Bio
Twitter: @BobWrightUNL

Adult differential grasshopper
Adult differential grasshopper

Watch For Grasshoppers in Crops

August 9, 2016
Growers are reporting grasshoppers in field borders moving into crop fields in parts of Nebraska. Here are the insect treatments to help you determine treatment need.

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Figure 1. Sugarcane aphids. (Photo credit: Patrick Porter, Texas Cooperative Extension, Bugwood.org)
Figure 1. Sugarcane aphids. (Photo credit: Patrick Porter, Texas Cooperative Extension, Bugwood.org)

Be on the Lookout for Sugarcane Aphids on Sorghum

July 29, 2016
Nebraska grain sorghum producers are being advised to be on the lookout for sugarcane aphids. While this pest hasn't been a problem in Nebraska previously, it is in Kansas and moving north. The sugarcane aphid is light yellow to gray in color, with dark cornicles (“tail-pipes”) at the end of the body and dark tarsi (feet). Adult aphids can be winged or wingless.

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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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