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Sicklepod (Senna obtusifolia) seed production and viability as influenced by late-season postemergence herbicide applications

Published online by Cambridge University Press:  12 June 2017

Shane E. Taylor  and
Lawrence R. Oliver
Lawrence R. Oliver
Affiliation:
Valent USA Corporation, North Mankato, MN 56003
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Abstract

Field studies were conducted at the Main Experiment Station, Fayetteville, AR, in 1994 and 1995 to evaluate the effect of postemergence herbicides applied at late-season timings on sicklepod seed production and viability. AC 263,222, dicamba, glyphosate, glufosinate, and paraquat were applied at five rates (zero; labeled rate; one-half, one-fourth, and one-eighth the labeled rate) to three sicklepod growth stages (bud formation, flowering to 9-cm pods, and 15- to 30-cm pods). The greatest reduction in seed production occurred when herbicides were applied at the flowering to 9-cm pod growth stage. All herbicides applied at one-half the labeled rate to sicklepod at bud formation and at the flowering to 9-cm pod growth stage reduced seed production greater than 80%, except glufosinate. Regardless of herbicide, rate, or application timing, viability of remaining seed was ≥ 90% with all treatments.

Keywords

AC 263,222, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1 H-imidazol-2-yl]-5-methyl-3-pyridinecarboxylic aciddicamba, 3,6-dichloro-2-methoxybenzoic acidglyphosate, N-(phosphonomethyl)glycineglufosinate, 2-amino-4-(hydroxymethylphosphinyl)butanoic acidparaquat, 1,1‘-dimethyl-4,4’-bipyridinium ionsicklepod, Senna obtusifolia L. SENOBSoil seedbankseed numberssicklepod reproductionweed seed yieldAC 263,222chlorimurondicambaethephonglufosinateglyphosateimazaquinmetribuzinparaquat2,4-DBSENOB
Type
Weed Biology and Ecology
Information
Weed Science , Volume 45 , Issue 4 , August 1997 , pp. 497 - 501
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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