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Leafy Spurge (Euphorbia esula) Control with Quinclorac

Published online by Cambridge University Press:  12 June 2017

Brian D. Kuehl  and
Rodney G. Lym
Brian D. Kuehl
Affiliation:
Plant Science Department, North Dakota State University, Fargo, ND 58105
Rodney G. Lym
Affiliation:
Plant Science Department, North Dakota State University, Fargo, ND 58105
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Abstract

Quinclorac is a systemic herbicide registered to control annual grass and broadleaf weeds in rice. Field research was conducted to determine the most effective quinclorac treatment for leafy spurge control. Leafy spurge control 12 mo after treatment (MAT) averaged 38 and 77% when quinclorac was applied at 0.56 and 1.7 kg ae/ha, respectively. Quinclorac applied with the crop-oil-based adjuvant Scoil provided similar leafy spurge control compared to quinclorac applied alone. Quinclorac plus Scoil applied with picloram provided better leafy spurge control than quinclorac plus Scoil alone. The optimum date for fall treatment with quinclorac is broad. Quinclorac at 1.1 kg/ha plus Scoil at 2.3 L/ha applied on September 1, September 15, October 1, and October 15 provided similar leafy spurge control and averaged 56% 12 MAT.

Keywords

Picloram, 4-amino-3,5,6-trichloro-2-pyridinecarboxylic acidquinclorac, 3,7-dichloro-8-quinolinecarboxylic acidleafy spurge, Euphorbia esula L. # EPHES, rice, Oryza sativa L.Noxious weedpasture and rangeland weed controlpicloramMAT, months after treatmentOM, organic matter
Type
Research
Information
Weed Technology , Volume 11 , Issue 2 , June 1997 , pp. 265 - 269
Copyright
Copyright © 1997 by the Weed Science Society of America 

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