Corn

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Nitrogen Rescue Treatments in Corn

June 17, 2016

When corn is yellow and struggling to get nitrogen, a rescue treatment may be advisable. Research in neighboring states found a rescue treatment could increase yields by an average 34 bu/ac.

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.

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.

UNL Corn Yield Model Verifies as Reliable Larger Scale Predictor

June 13, 2016

Collecting basic agricultural data from a mere 45 sites can provide enough predictive power to reasonably estimate crop yields within a 10-state swath of the U.S. Corn Belt, says a new study led by the University of Nebraska-Lincoln. The study compared actual corn production from 2011 through 2014 against best-case projections from the UNL Hybrid-Maize model that accounts for weather, soil properties and planting practices.

Wheat Stem Maggot Damaging Corn after Rye

June 9, 2016

UNL has been tracking an unusual insect pest the past couple of years in northeast Nebraska that may be a potential concern to farmers growing corn after rye or other grass cover crops. A number of producers and crop scouts have reported stunted corn plants at V1 to V2 with brown flagging in their fields due to the wheat stem maggot (WSM), a species of Chloropid fly. These are small flies that are typically about 1/8 inch long with black and yellow markings. The wheat stem maggot overwinters in the stem of its host plants as a larva and emerges in May to begin feeding.

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.

Resistant Palmer Amaranth Management Field Day at Shickley

June 8, 2016

Nebraska Extension will be hosting a Resistant Palmer Amaranth Management Field Day Tuesday, July 12, near Shickley to demonstrate control options in corn. Keynote speaker will be Jason Norsworthy, professor and endowed chair of Weed Science at the Unversity of Arkansas. Norsworth has documented eight herbicide-resistant weeds in Arkansas, including glyphosate-resistant Palmer amaranth.

Corn nematode damage — Figure 1a. Severe sting nematode injury to corn. When sampling severely affected areas, collect samples from the edges of damaged areas in the field. That's where you'll find the most nematodes. (Photos by Tamra Jackson-Ziems)

Corn Nematodes: Scout Sandy Soils Now, Other Soils Any Time

June 7, 2016

This year nematode damage in some Nebraska fields may be masked by the ample rainfall we’ve received, but rest assured, these plant parasitic nematodes are still there in almost every field. Their impact ranges from no obvious sign to severe crop injury and tremendous yield loss.

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