CONTROL POISON HEMLOCK( CONIUM MACULATUM) WITH WINTER APPLICATION OF BROAD LEAF HERBICIDES
Extension Education
Ronnie Horn
County Agent
Fayetteville
Abstract
In 2018 Duracor ( aminopyralid (2-pyridine carboxylic acid, 4-amino-3, 6-dichloro-) received a license to allow the sale in Arkansas. It is an unrestricted herbicide for the control broadleaf weeds. Starting in fall of 2019 Broadleaf forage Herbicide demonstrations were conducted in 34 locations across the state. The comparison treatments are typical herbicides used in forage weed control throughout Arkansas and recommended in pasture Weed Control in Arkansas MP522. Herbicide demonstration treatments were 2,4 D one Quart per acre, Metsulfuron 0.3 Ounces per acre, Grazon p+d One Quart per acre, GrazonNext one Quart per acre, Duracor 12 ounces per acre, Duracor 16 ounces per acre, Duracor Impregnated Fertilizer 16 ounces per 200 pounds of fertilizer per acre. All foliar treatments were applied with a CO2 backpack sprayer at 15 gallons per acre. The treatments were applied four times. January 5, 2020, April 3, 2020, and June The species of weeds that were used to evaluate the effectiveness of the treatments. Poison Hemlock ( Conium maculatum), All of the treatments provided control rate of 90% of Hemlock when applied in the winter application, with the exception of the Duracor impregnated fertilizer that was 50% on the January Treatment and 2,4D on the April treatment.
Poster has NOT been presented at any previous NACAA AM/PIC
This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.
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Authors: R. Horn
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Horn, R. County Agent, University of Arkansas, Division of Agriculture, Arkansas, 72704