Amit Jhala - Extension Weed Management Specialist

Marestail seedling and field infested with marestail
Figures 1 (inset). Marestail plant forming rosette in spring. Figure 2. Corn field infested with glyphosate-resistant marestail in eastern Nebraska. (All photos by Debalin Sarangi).

When is a Good Time to Scout and Control Glyphosate-Resistant Marestail?

March 8, 2017

Marestail, also known as horseweed or Canada fleabane, is a winter or summer annual weed in Nebraska. Historically, marestail was found in waste area, field edges, along roadsides, and railway tracks; however, no-till crop production systems over the last 20 years favor marestail germination and establishment in agronomic crops in Nebraska.

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Soybean field treated with Sonic herbicide

New Soybean Herbicides for 2017

March 6, 2017
Information on new soybean herbicides, incuding their modes of action

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New Corn Herbicides for 2017

February 24, 2017
Information on new herbicides for corn that will be available for the 2017 crop production season.

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Section of the Herbicide Classification Chart
Section of the Herbicide Classification Chart

2017 Chart for Selection of Herbicides Based on Site of Action

February 2, 2017
Management of glyphosate-resistant weeds is now the greatest challenge for Nebraska crop producers and land managers. The 2017 Herbicide Classification Chart from Take Action Against Weeds is an easy means for identifying herbicide site of action to avoid repeated use of the same action on the same field.

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Jhala Receives Early Career Outstanding Weed Scientist Award

February 1, 2017
Amit Jhala, Nebraska Extension weed management specialist and frequent contributor to CropWatch, has been honored with an Early Career Outstanding Weed Scientist Award by the Weed Science Society of America. This award recognizes outstanding contributions made by an early career weed scientist in research, extension, and/or teaching in the US. Jhala joined the University of Nebraska-Lincoln faculty in 2012 and has a split appointment in research and extension in the Department of Agronomy and Horticulture.

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Field trial with Roundup Ready 2 Xtend soybeans and a pre and post herbicide application.

Understanding the Roundup Ready 2 Xtend™ Soybean Weed Management System

November 11, 2016
A new soybean cultivar with dicamba-tolerant Roundup Ready 2 Xtend™ soybean is expected to be planted on over 15 million acres in 2017, offering an additional means of managing herbicide-resistant weeds. The weed management system, which was tested the last four years in Nebraska trials, provides for use of Roundup Xtend™ of XtendiMax™ (dicamba).

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CW Q&A
CW Q&A

Q&A: Which formulation of 2,4-D is preferred for fall application?

November 4, 2016
Answers to three grower questions on fall herbicide application in row crops.

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Debalin Sarangi, weed science postdoctoral research associate, describes the key identifying characteristics of broadleaf and grass weed species during weed management field day
Figure 1. Debalin Sarangi, weed science postdoctoral research associate, describes the key identifying characteristics of broadleaf and grass weed species during a 2016 weed management field day.

New Herbicides & Managing Multiple Herbicide-Tolerant Crops

July 28, 2016
In Nebraska, eight weed species (common ragweed, common waterhemp, giant ragweed, kochia, marestail, Palmer amaranth, redroot pigweed, and shattercane) have been confirmed resistant to at least one herbicide.  Six of them — common ragweed, common waterhemp, giant ragweed, kochia, marestail, and Palmer amaranth — have been confirmed resistant to glyphosate in Nebraska. This article reviews information presented at the Weed Management Field Day at the UNL South Central Ag Lab, focusing on field demonstrations and methods to reduce the development of further herbicide resistance.

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