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Response of Three Runner-Type Peanut Cultivars to Flumioxazin

Published online by Cambridge University Press:  20 January 2017

Christopher L. Main ,
Joyce Tredaway Ducar ,
E. Ben Whitty  and
Greg E. Macdonald
Christopher L. Main
Affiliation:
Agronomy Department, University of Florida, P.O. Box 110500, Gainesville, FL 32611–0500
Joyce Tredaway Ducar
Affiliation:
Agronomy Department, University of Florida, P.O. Box 110500, Gainesville, FL 32611–0500
E. Ben Whitty
Affiliation:
Agronomy Department, University of Florida, P.O. Box 110500, Gainesville, FL 32611–0500
Greg E. Macdonald
Affiliation:
Agronomy Department, University of Florida, P.O. Box 110500, Gainesville, FL 32611–0500
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Abstract

Field studies were conducted in 1999 and 2000 at Marianna and Gainesville, FL, to evaluate the response of three runner-type peanut cultivars, ‘Georgia Green’, ‘C-99R’, and ‘MDR-98’, to flumioxazin applied preemergence at 0, 71, 105, and 211 g/ha in a weed-free environment. Peanut exhibited excellent tolerance to flumioxazin, regardless of flumioxazin rate or peanut cultivar, at Gainesville in 1999 and both locations in 2000. In 1999, at Marianna, flumioxazin caused early-season stunting and season-long reduction in peanut canopy width. Peanut response was independent of cultivar and did not exceed 25%, with an increase in stunting with higher flumioxazin rates. Peanut stunting was associated with cool and extremely wet growing conditions during the first 2 mo after planting in 1999 at Marianna. Peanut yield and grade parameters, in both years, were not affected by flumioxazin treatment.

Keywords

Flumioxazinpeanut, Arachis hypogaea L. ‘Georgia Green’, ‘C-99R’, ‘MDR-98’Cultivarextra large kernelsgrade analysisother kernelssound mature kernelssound splitstotal sound mature kernelsyieldDAP, days after plantingELK, extra large kernelsOK, other kernelsPPI, preplant incorporatedPPO, protoporphyrinogen oxidasePRE, preemergenceSMK, sound mature kernelsSS, sound splitsTSMK, total sound mature kernels
Type
Research
Information
Weed Technology , Volume 17 , Issue 1 , March 2003 , pp. 89 - 93
Copyright
Copyright © Weed Science Society of America 

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