Stevan Knezevic - Extension Weed Management Specialist

Stevan Knezevic

faculty
Work Keim Hall (KEIM) 102C
Lincoln NE 68583-0915
US
Work 402-472-6498 On campus, dial 2-6498

Faculty Bio

Velvetleaf

Control of Velvetleaf with Post-emergence Herbicides in Popcorn

August 12, 2021
Results of a study evaluating the efficacy and crop safety of labeled post-emergence herbicides to control velvetleaf, a major agricultural weed in Nebraska that reduces yields in popcorn if not controlled.

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Volunteer corn

Control of Roundup/Liberty Resistant Corn Volunteers in Enlist Corn

August 5, 2021
Results of a study evaluating Assure II for Roundup/Liberty-resistant corn volunteer control in Enlist corn and correct timing of application for use in corn-on-corn production systems.

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Weed guide customer map
Figure 1: Weed Guide customers across the USA (data from UNL Marketplace, 2019). (Photo by Stevan Knezevic)

Extension Marks 61 Years of Weed Guide with User Survey

May 5, 2021
Producers and other agricultural professionals are invited to participate in an anonymous survey about how they utilize Nebraska Extension's Guide for Weed, Disease, and Insect Management in Nebraska.

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Broadleaf cover crop
When using a burndown herbicide to terminate broadleaf cover crops and weeds this spring, planting intervals often may negate the use of many 2,4-D products prior to Enlist E3® soybean planting. (Photos by Amit Jhala).

Which 2,4-D Product Should I Use as a Burndown Before Planting Enlist E3® Soybean?

April 29, 2021
A review of the best production options for growers who are preparing to terminate broadleaf cover crop species and winter annual broadleaf weeds using 2,4-D products.

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click to read Industrial Hemp Tolerance to Flame Weeding

Industrial Hemp Tolerance to Flame Weeding

November 30, 2020
Hemp exhibited relatively good tolerance to heat from propane flaming. Temporary injury could be considered acceptable since it was only at the base of the plants and lasted only for about two weeks.

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links to Industrial Hemp Tolerance to Late-POST Herbicides

Industrial Hemp Tolerance to Late-POST Herbicides

November 18, 2020
Hemp exhibited high level of sensitivity to most of the tested herbicides. Visual injury levels ranged from almost no injury (~5%) with only one herbicide, to some temporary injury (~20%) with a few herbicides and severe injury or death (60%-93%) with about 10 out of 18 herbicides tested.

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hemp showing minor herbicide injury

Industrial Hemp Tolerance to Early-POST Herbicides

November 11, 2020
Hemp exhibited relatively good tolerance to several products that can be used postemergence in industrial hemp. It is important to note that the conclusions are based only on one year of data. This study will be repeated in 2021 season.

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soybean showing Dicamba injury

USEPA Approves Three Dicamba Products for Five Years

October 29, 2020
On Oct 27, 2020, The United States Environmental Protection Agency (USEPA) announced a new 5-year registration for XtendiMax® and Engenia, and re-registered Tavium (a premix of dicamba and S-metolachlor).

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