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Carrot (Daucus carota) and Weed Response to Linuron and Metribuzin Applied at Different Crop Stages

Published online by Cambridge University Press:  12 June 2017

Robin R. Bellinder ,
Jonathan J. Kirkwyland  and
Russell W. Wallace
Robin R. Bellinder
Affiliation:
Department of Fruit and Vegetable Science, 134-A Plant Science Building, Cornell University, Ithaca, NY 14853-0327
Jonathan J. Kirkwyland
Affiliation:
Department of Fruit and Vegetable Science, 134-A Plant Science Building, Cornell University, Ithaca, NY 14853-0327
Russell W. Wallace
Affiliation:
Department of Fruit and Vegetable Science, 134-A Plant Science Building, Cornell University, Ithaca, NY 14853-0327
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Abstract

Redroot pigweed and common lambsquarters control was variable within and between seasons when postemergence linuron and metribuzin were applied one or two times at below-labeled rates to one-, three-, or five-leaf carrots. A single, low-rate application of either herbicide at the one-or three-leaf stage of carrots failed to provide adequate season-long broadleaf weed control. Two low-rate applications to either one- + three- or three- + five-leaf carrots significantly improved control. Linuron produced little or no injury to carrots regardless of application timing. Metribuzininduced injury was variable initially and decreased to 10% or less by 14 d after treatment. One application of either linuron or metribuzin resulted in reduced yields of carrots.

Keywords

Linuron, N'-(3,4-dichlorophenyl)-N-methoxy-N-methylureametribuzin, 4-amino-6-(1,1,-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-oneredroot pigweed, Amaranthus retroflexus L. # AMAREcommon lambsquarters, Chenopodium album L. # CHEALcarrot, Daucus carota L. var. sativa ‘Mark I.'Application timingpostemergence controlreduced herbicide rates
Type
Research
Information
Weed Technology , Volume 11 , Issue 2 , June 1997 , pp. 235 - 240
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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