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Field Evaluation of a Native Fungus for Control of Melaleuca (Melaleuca quinquenervia) in Southern Florida

Published online by Cambridge University Press:  12 June 2017

Min B. Rayachhetry ,
Monica L. Elliott ,
Ted D. Center  and
Francois Laroche
Min B. Rayachhetry*
Affiliation:
Fort Lauderdale Research and Education Center, University of Florida, 3205 College Avenue, Fort Lauderdale, FL 33314
Monica L. Elliott
Affiliation:
Fort Lauderdale Research and Education Center, University of Florida, 3205 College Avenue, Fort Lauderdale, FL 33314
Ted D. Center
Affiliation:
USDA-ARS, Weed Research Laboratory, 3205 College Avenue, Fort Lauderdale, FL 33314
Francois Laroche
Affiliation:
South Florida Water Management District, Gun Club Road, West Palm Beach, FL 33416
*
Corresponding author's E-mail: raya@gnv.ifas.ufl.edu.
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Abstract

A native fungus, Botryosphaeria ribis, was evaluated under field conditions to determine its potential to control melaleuca. Applications consisted of either wound inoculations of trees with B. ribis or fresh stump treatments with B. ribis alone or mixed with imazapyr herbicide. There was no mortality among nondefoliated trees inoculated with B. ribis. Mortality of B. ribis-inoculated trees was increased by three complete defoliation cycles. Defoliated trees inoculated with isolate BR-5 exhibited 100% mortality compared to 17% for defoliated but noninoculated trees. Wounds inoculated with B. ribis during winter produced longer cankers than did noninoculated wounds. Stump regrowth reduction by treatment with B. ribis alone was less effective than treatment with imazapyr alone. Mixtures of B. ribis with imazapyr or imazapyr alone at comparable concentrations did not differ in stump regrowth control.

Keywords

Imazapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-pyridinecarboxylic acidmelaleuca, Melaleuca quinquenervia (Cav.) Blake # MLAQUBiological controlweed controlmycoherbicideherbicideimazapyrregrowth controlstump treatmentBotryosphaeria ribisMLAQUDBH, diameter at breast heightPDA, potato-dextrose agarPDB, potato-dextrose brothSDW, sterile deionized water
Type
Research
Information
Weed Technology , Volume 13 , Issue 1 , March 1999 , pp. 59 - 64
Copyright
Copyright © 1999 by the Weed Science Society of America 

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Footnotes

1

Florida Agricultural Experiment Station Journal Series R-06453.

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