Greg Kruger - Weed Science and Application Technology Specialist

Greg Kruger

Faculty Bio

Chemical sprayer application in the field

How Clean is Your Sprayer? Study Participants Needed May 10, 2019

University researchers are seeking 30 Nebraska spray applicators for a sprayer cleanout study. The study will help extension application educators learn about applicator practices and how to direct their educational efforts.

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Visual evaluation of waterhemp growth 21 days after an atrazine application.

Research Report: Prevalence and Mechanism of Atrazine Resistance in Waterhemp from Nebraska October 26, 2018

Researchers studied waterhemp populations in eastern Nebraska to evaluate the efficacy of PRE and POST herbicide applications and the mechanism of atrazine resistance. Here's what they found and take-home messages to apply to your operation.

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Figure 1. Two runs of the experiment (front, just beginning second run; back, just finishing first run) conducted in the greenhouse at the Pesticide Application Technology Laboratory at the university’s West Central Research and Extension Center in North Platte.
Figure 1. Two runs of the experiment (front, just beginning second run; back, just finishing first run) conducted in the greenhouse at the Pesticide Application Technology Laboratory at the university’s West Central Research and Extension Center in North Platte.

Competitiveness of Herbicide-Resistant Waterhemp with Soybean September 26, 2018

The objective of this study was to evaluate the competitiveness of three herbicide-resistant Nebraska waterhemp populations with soybean in a greenhouse environment. The results indicate the importance of enhancing early-season crop competitiveness.

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Pulse width modulation sprayer
Figure 1. The Capstan PinPoint® pulse-width modulation (PWM) sprayer used for this research is shown at the Palmer amaranth field site located near Beaver City. (Photos by Thomas Butts)

Precise Spray Droplet Sizes for Optimizing Herbicide Applications April 10, 2018

Achieving the most effective and consistent spray droplet size helps provide for precision application of pesticides, which saves input costs and reduces off-target movement. University researchers using a pulse-width modulation sprayer studied the best droplet size for effective weed control with six herbicides used in Nebraska crop production.

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Managing Pesticide Applications for Me and the Environment January 8, 2018

An article from the Proceedings of the 2018 Nebraska Extension Crop Production Clinics on managing pesticide applications to reduce drift and other forms of off-target movement.

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Spraying the New Phenoxy Herbicide Formulations in Xtend and Enlist Soybeans Will Present Challenges May 11, 2017

The new phenoxy herbicide formulations, including Enlist Duo™ (Dow), XtendiMax® (Monsanto), Engenia™ (BASF), and FeXapan™ (DuPont), offer growers new management options along with new application requirements. To alleviate problems related to applying new phenoxy herbicide formulations in soybeans as well as to increase herbicide performance, manufacturers have established application requirements. Here we discuss some of the key application factors to consider.

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Horseweed plant stages
Figure 1. (Top left) Newly emerged horseweed seedlings in the cotyledon stage. (Bottom left) Seedling in the rosette stage with true leaves formed. (Right) Horseweed plants that are early in the bolting stage.

Nebraska Extension Pest of The Month: Horseweed January 5, 2017

Horseweed (marestail, Conyza canadensis L.) is a unique weed species that can emerge in both fall and spring. In Nebraska, unlike the eastern Corn Belt, horseweed populations predominantly emerge in fall as a winter annual.

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Control Early Stages of Marestail and Kochia March 18, 2016

Glyphosate-resistant weeds pose a major threat to no-till production in Nebraska.

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