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Postemergence-Directed Sprayers for Wild-Proso Millet (Panicum miliaceum) Control

Published online by Cambridge University Press:  12 June 2017

Craig D Kleppe  and
Robert G. Harvey
Craig D Kleppe
Affiliation:
Dep. Agron., Univ. Wis., Madison, WI 53706
Robert G. Harvey
Affiliation:
Dep. Agron., Univ. Wis., Madison, WI 53706
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Abstract

Several precision postemergence-directed sprayers with different nozzle designs and arrangements were evaluated for potential use in sweet corn for wild-proso millet (PANMI) control in field trials from 1987 to 1989. Ametryn at 2270 g ha-1 plus oil-emulsifier mixture (OEM) at 1.3% v/v and sethoxydim alone or plus OEM applied postemergence-directed selectively controlled PANMI in sweet corn. Sethoxydim at 220 g ha-1 plus OEM controlled PANMI best when averaged over the 3-yr period. Ametryn plus OEM did not injure corn and sethoxydim at 110 g ha-1 plus OEM caused little or no corn injury and no yield reductions when applied with any of the sprayers. Generally, only sethoxydim at 220 g ha-1 plus OEM injured corn. The amount of injury was different among sprayers, with the nozzle designs and arrangements responsible for corn injury. Injury was minimized when sethoxydim was applied with a sprayer equipped with 150 degree dual orifice nozzles spaced 38 cm apart and mounted on skids that contacted the soil to assure constant nozzle height. This sprayer, or sprayers of similar nozzle design, show the most potential for use by sweet corn growers.

Keywords

Ametryn, N-ethyl-N′-(1-methylethyl)-6-(methylthio)-1,3,5-triazine-2,4-diaminesethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onewild-proso millet, Panicum miliaceum L. ssp. ruderale (Kitagawa) Tzevelev. ♯ PANMIcorn, Zea mays L.Corn tolerancecrop oil concentratecultivatordual orifice nozzlesroot uptakesandy soilshieldsskidssethoxydimametrynPANMI
Type
Research
Information
Weed Technology , Volume 5 , Issue 1 , March 1991 , pp. 185 - 193
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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