Greg Kruger - Weed Science and Application Technology Specialist

Greg Kruger

Faculty Bio

8 Points to Success With Postemergence Herbicide Applications

June 19, 2019
Many crop fields did not get the early-season residual herbicides they usually would, placing a heavier reliance on post-emergence programs this year. Following these eight guidelines can help assure safe, effective POST applications that minimize the potential for off-site contamination.

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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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