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Safety of Herbicides on ‘zenith’ Zoysiagrass Seedlings

Published online by Cambridge University Press:  20 January 2017

Aaron J. Patton
Affiliation:
Purdue University Department of Agronomy, Lilly Hall of Life Sciences, 915 West State Street, West Lafayette, IN 47907-2054
Daniel V. Weisenberger
Affiliation:
Purdue University Department of Agronomy, Lilly Hall of Life Sciences, 915 West State Street, West Lafayette, IN 47907-2054
Glenn A. Hardebeck
Affiliation:
Purdue University Department of Agronomy, Lilly Hall of Life Sciences, 915 West State Street, West Lafayette, IN 47907-2054
Zachary J. Reicher*
Affiliation:
Purdue University Department of Agronomy, Lilly Hall of Life Sciences, 915 West State Street, West Lafayette, IN 47907-2054
*
Corresponding author's E-mail: [email protected]

Abstract

Improved cultivars of zoysiagrass established by seed are now available, but little is known about the safety of herbicides on zoysiagrass seedlings. Our objective was to determine the turf safety of various herbicides when applied from emergence to 4 wk after emergence (WAE) of ‘Zenith’ zoysiagrass. Oxadiazon (3.4 kg ai/ha), MSMA (2.3 kg ai/ha), and pronamide (1.1 kg ai/ha) did not reduce coverage 7 WAE when applied at emergence or later and caused only temporary discoloration of seedlings. Foramsulfuron (0.03 kg ai/ha) injured seedling zoysiagrass both years of testing and reduced cover in the final year. Fluazifop (0.07 kg ai/ha) caused significant injury in all 3 yr of the study and reduced coverage in the final year. Fenoxaprop (0.14 kg ai/ha) caused visible injury and reduction in zoysiagrass coverage in all 3 yr of the study. Our studies indicate pronamide, MSMA, or oxadiazon are the safest herbicides to use over Zenith zoysiagrass seedlings, and selection among these three depends on the primary weed species present.

Type
Research
Copyright
Copyright © Weed Science Society of America 

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