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Herbicide Efficacy Using a Wet-Blade Application System

Published online by Cambridge University Press:  20 January 2017

Scott E. Henson
Affiliation:
Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695
Walter A. Skroch
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695
James D. Burton*
Affiliation:
Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695
A. Douglas Worsham
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695
*
Corresponding author's E-mail: jim_burton@ncsu.edu

Abstract

Field research was conducted to test a method of herbicide application in which chemical is placed directly onto cut surfaces of plants during a mowing operation. Specially designed mowers equipped with a fluid application system allow for low-volume herbicide application from the cutting blades during the mowing process (wet blade). Two prototype wet-blade machines, including a sickle bar cutter and a Burch Wet-Blade rotary mower, were used to apply triclopyr, clopyralid, and 2,4-D at various rates and combinations using a total carrier volume of 25 L/ha. Weed management studies were conducted on dogfennel, annual lespedeza, and clovers during a 2-yr period. Wet-blade herbicide applications were effective and performed as well as or better than comparative rates applied using a foliar spray technique. Triclopyr at 2.24 kg ae/ha controlled dogfennel when applied with either the rotary mower or the sickle bar cutter (94 and 77%, respectively). Rotary mower applications of 0.20 kg ae triclopyr + 0.07 kg ae clopyralid per hectare in rough turf achieved 90% control of annual lespedeza and 95% control of red and white clovers.

Type
Research
Copyright
Copyright © Weed Science Society of America 

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