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Determination of optimum metam-potassium rate for weed, tomato, and pepper termination

Published online by Cambridge University Press:  11 June 2020

Kshitij Khatri Open the ORCID record for Kshitij Khatri [Opens in a new window]  and
Nathan S. Boyd
Kshitij Khatri
Affiliation:
Graduate Student, University of Florida–Gulf Coast Research and Education Center, Wimauma, FL, USA
Nathan S. Boyd*
Affiliation:
Associate Professor, University of Florida–Gulf Coast Research and Education Center, Wimauma, FL, USA
*
Author for correspondence: Nathan S. Boyd, University of Florida–Gulf Coast Research and Education Center, 14625 County Road 672, Wimauma, FL33598 Email: nsboyd@ufl.edu
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Abstract

Metam potassium (metam-K) is a soil fumigant used commonly in Florida at the end of the tomato and pepper production season. The fumigant essentially cleans a field by killing the established weeds and crops after harvest. The goal of this project was to determine the optimal rate of metam-K for the effective termination of tomato, pepper, and established weeds such as purple nutsedge, goosegrass, and dogfennel. Tomato, pepper, and purple nutsedge at bed center were effectively terminated with the metam-K rate of 65 kg ha−1. Optimal rates required for the termination of goosegrass and dogfennel were 91 and 156 kg ha−1, respectively. In contrast, metam-K at 500 to 680 kg ha−1 was required to terminate purple nutsedge on bed edges. The reduced efficacy of metam-K at bed edge might be related to the limited movement of metam-K in soil.

Keywords

Metam potassiumdogfennelEupatorium capillifolium (Lam.) SmallgoosegrassEleusine indica (L.) GaertnpepperCapsicum annuum L.purple nutsedgeCyperus rotundus L.tomatoSolanum lycopersicum L.fumigationplasticulturesoil fumigationcrop terminationgrassy weedsbroad leaf weedssanitation
Type
Research Article
Information
Weed Technology , Volume 34 , Issue 6 , December 2020 , pp. 801 - 806
Copyright
© Weed Science Society of America, 2020

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Footnotes

Associate Editor: Robert Nurse, Agriculture and Agri-Food Canada

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