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Preherbicide Mowing and Herbicide Rate on Tropical Soda Apple (Solanum viarum) Control

Published online by Cambridge University Press:  12 June 2017

Paul Mislevy ,
J. Jeffrey Mullahey  and
Frank G. Martin
Paul Mislevy*
Affiliation:
Range Cattle Research Education Center, University of Florida, IFAS, 3401 Experiment Station, Ona, FL 33865
J. Jeffrey Mullahey
Affiliation:
Southwest Florida Research Education Center, University of Florida, IFAS, Immokalee, FL 34143
Frank G. Martin
Affiliation:
Statistics Department, University of Florida, IFAS, Gainesville, FL 32611
*
Corresponding author's E-mail: ona@gnv.ifas.ufl.edu.
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Abstract

Field studies were conducted in 1993–1994 and 1994–1995 to evaluate the effects of preherbicide mowing and herbicide rate on tropical soda apple (TSA) control. Mature TSA plants were mowed one, two, or three times to a 7.5-cm stubble with a 60-d interval between mowings. Triclopyr was applied at 0, 0.6, and 1.1 kg ai/ha at 375 L/ha at 207 kPa 60 d after each mowing treatment. Mowing TSA plants twice before an application of 0.6 kg ai/ha triclopyr resulted in 100% control. Tropical soda apple control (2-yr average) for the triclopyr treatment increased between one (28% control) and two (82% control) preherbicide mowings, with no additional control benefits from three mowings (84% control). In a second study, TSA control increased from 10% 60 d after a single mowing to 92% after three consecutive mowings at 60-d intervals with no herbicide. Total nonstructural carbohydrates in TSA crowns decreased from 19.1% for unclipped plants to 4.3% 60 d after three preherbicide mowings.

Keywords

Triclopyr, [(3,5,6-trichloro-2-pyridinyl)oxy]acetic acidtropical soda apple, Solanum viarum Dunal # SOLVITriclopyrPaspalum notatumDigitaria decumbensDIGDEPASNOSOLVIDAT, days after treatmentLAI, leaf area indexTNC, total nonstructural carbohydratesTSA, tropical soda apple
Type
Research
Information
Weed Technology , Volume 13 , Issue 1 , March 1999 , pp. 172 - 175
Copyright
Copyright © 1999 by the Weed Science Society of America 

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References

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