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Adjuvants and Growth Stage Affect Purple Nutsedge (Cyperus rotundus) Control with Chlorimuron and Imazethapyr

Published online by Cambridge University Press:  12 June 2017

David L. Jordan
David L. Jordan*
Affiliation:
Northeast Res. Stn., Louisiana State Univ., Agric. Cent., P.O. Box 438, St. Joseph, LA 71366
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Abstract

Chlorimuron and imazethapyr applied with nonionic surfactant, crop oil concentrate, or organosilicone-based adjuvant were evaluated for purple nutsedge control in the field. Additional experiments compared chlorimuron and imazethapyr control of purple nutsedge when applied with crop oil concentrate at two growth stages. Chlorimuron controlled purple nutsedge better than did imazethapyr in most experiments. Chlorimuron performed better when applied with crop oil concentrate than with nonionic surfactant or organosilicone-based adjuvant. Imazethapyr control with the organosilicone-based adjuvant or crop oil concentrate was similar and greater than imazethapyr with nonionic surfactant. Control was greater when herbicides were applied to 2- to 6-cm tall purple nutsedge compared with plants 8 to 10 cm tall in two of three trials.

Keywords

Chlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acidimazethapyr, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidpurple nutsedge, Cyperus rotundus L. # CYPROCrop oil concentratenonionic surfactantorganosilicone-based adjuvantCYPRO
Type
Research
Information
Weed Technology , Volume 10 , Issue 2 , June 1996 , pp. 359 - 362
Copyright
Copyright © 1996 by the Weed Science Society of America 

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References

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