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Economics and Efficacy of Postemergence Spurred Anoda (Anoda cristata) Control in Pinto Beans (Phaseolus vulgaris)

Published online by Cambridge University Press:  12 June 2017

Mark J. Vangessel  and
Phil Westra
Mark J. Vangessel
Affiliation:
Department of Plant Pathology and Weed Science, Colorado State University, Ft. Collins, CO 80523
Phil Westra
Affiliation:
Department of Plant Pathology and Weed Science, Colorado State University, Ft. Collins, CO 80523
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Abstract

Spurred anoda is an increasing weed problem in Colorado pinto bean production. This research was designed to evaluate reduced rates of bentazon and imazethapyr applied at various times for spurred anoda control and profitability. In 1993, spurred anoda control with early applications of either bentazon or imazethapyr was superior to late applications. Bentazon provided better spurred anoda control than imazethapyr in June. Spurred anoda control in 1993 was better than in 1994 due to late-emerging weeds and herbicide treatments not providing residual control. In 1994, bentazon controlled spurred anoda better than imazethapyr 1 and 3 wk after late POST, but no treatment provided commercially acceptable full-season control. The number of treatments with gross margins greater than the untreated check increased as pinto bean prices increased, but ranking of gross margin did not change due to pinto bean prices.

Keywords

Bentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxideimazethapyr, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidspurred anoda, Anoda cristata (L.) Schlecht. # ANVCRpinto bean, Phaseolus vulgaris L.Gross marginreduced rate technologyCOC, crop oil concentrateEPOST, early postemergenceLPOST, late postemergenceNIS, nonionic surfactant
Type
Research
Information
Weed Technology , Volume 11 , Issue 2 , June 1997 , pp. 329 - 334
Copyright
Copyright © 1997 by the Weed Science Society of America 

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