EVALUATION OF HERBICIDES FOR USE IN PERENNIAL PEANUT
Applied Research
Josh Thompson
Regional Specialized IPM Agent
UF/IFAS
Marianna
Abstract
Perennial Peanut (Arachis glabrata, Benth) is a high value hay crop adapted to the coastal plains of the Southeastern US and is similar in quality to alfalfa. The number one limiting factor to marketability and production is weed control. There are currently only 4 herbicides [imazapic, 2,4D, hexazinone, clethodim] that can be legally applied to perennial peanut which creates a need for research on alternative chemistries. Four herbicide trials were conducted in 2013 in Marianna and Quincy, Florida. The objective of trial 1 and 2 was to determine the efficacy of herbicides during stand establishment while the objective of trial 3 and 4 was to determine the efficacy of herbicides on an established stand. Trials 1 and 2 were planted on May 10, 2013 and treatments were applied on May 14 and July 9, respectively. Treatments from trials 3 and 4, conducted on 2 different established stands, were applied June 19 and July 17 following hay removal. The following treatments varied by trial but included: pendamethalin, imazapic, 2,4D, metribuzin, imazapic + 2, 4D, imazapic + metribuzin, hexazinone, bentazon + acifluorfen, acifluorfen, as well as untreated controls. Results from trials 1 and 2 showed weed control from imazapic, metribuzin, and hexazinone was significantly greater than the untreated and other treatments. Results from trials 3 and 4 show that imazapic and imazapic + 2,4D or metribuzin significantly increased weed control over the untreated. Additional testing will be conducted to determine if metribuzin or other chemistries have potential for use in perennial peanut.
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Poster has NOT been presented at any previous NACAA AM/PIC
This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.
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Authors: J. Thompson, Blount Ann, Mayo Doug
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Thompson, J. Regional Specialized IPM Agent, UF/IFAS, Florida, 32448
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Ann, B. Forage Extension Specialist, UF/IFAs, Florida, 32351
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Doug, M. Jackson County Extension Director, UF/IFAS, Florida, 32448