Insect Management

Soybean stem borer larva
Soybean stem borer larva

Soybean Stem Borers Feeding in South Central Nebraska

August 16, 2016
We are starting to see dead leaves caused by feeding of soybean stem borer larvae in south central Nebraska soybeans. No control measures are appropriate at this time, but monitor your fields and be aware that high populations of soybean stem borers may predispose the field to lodging and make harvest difficult.

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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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Engorged American dog tick
Engorged American dog tick

Tick Prevention Worth the Effort

August 2, 2016
It's tick season in Nebraska and time to create a barrier between you and these disease-transmitting pests. See tips for avoiding their bite and what to do if you find one on your body. Also see photos to aid in identification.

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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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Soybean aphid
Soybean aphid

Decision Making for Soybean Defoliating Insects

July 15, 2016
July is when growers start to see a variety of defoliators in Nebraska soybean fields. It's easy to overestimate the amount of defoliation and soybean plants can compensate for some leaf area loss. This article describes how to assess defoliation and provides basic treatment thresholds.

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Soybean defoliation levels
Figure 1. Levels of soybean defoliation. Impact of losing leaf area depends on growth stage.

Soybean Defoliation Worksheet

July 13, 2016

While soybean defoliation, the most common injury to soybeans from insects, can look devastating, soybean plants can often compensate for the leaf loss. When making pest-management decisions, crucial considerations are the size of the remaining leaf canopy and the soybeans' growth stage.

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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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