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Efficacy of five herbicide treatments for control of Pyrus calleryana

Published online by Cambridge University Press:  17 November 2020

James T. Vogt*
Affiliation:
Project Leader, USDA Forest Service, Southern Research Station, Athens, GA, USA
David R. Coyle
Affiliation:
Assistant Professor, Forest Health and Invasive Species, Clemson University, Forestry and Environmental Conservation Department, Clemson, SC, USA
David Jenkins
Affiliation:
Forest Health Program Coordinator, South Carolina Forestry Commission, Columbia, SC, USA
Chris Barnes
Affiliation:
Forest Health Specialist, Georgia Forestry Commission, Macon, GA, USA
Christopher Crowe
Affiliation:
Forestry Technician, USDA Forest Service, Southern Research Station, Athens, GA, USA
Scott Horn
Affiliation:
Entomologist, USDA Forest Service, Southern Research Station, Athens, GA, USA
Chip Bates
Affiliation:
Forest Health Specialist, Georgia Forestry Commission, Macon, GA, USA
Francis A. Roesch
Affiliation:
Research Statistician, USDA Forest Service, Southern Research Station, Asheville, NC, USA
*
Author for correspondence: James T. Vogt, USDA Forest Service, Southern Research Station, Athens, GA30602. (Email: [email protected])

Abstract

Callery pear (Pyrus calleryana Decne.) is rapidly spreading in the United States, gaining attention in the last two decades as a serious invasive pest. Recommended control methods include foliar, basal bark, cut stump, and hack-and-squirt application of herbicides, but there are few published studies with replicated data on efficacy. Four readily available herbicidal active ingredients and a combination of two active ingredients were tested for control efficacy against P. calleryana in old-field areas and loblolly pine (Pinus taeda L.) understory. Basal bark applications (triclopyr, triclopyr + aminopyralid), foliar applications (glyphosate, imazapyr), and a soil application (hexazinone) effectively killed P. calleryana with the exception of hexazinone at one site, where rainfall may not have been optimal. Foliar application of glyphosate provided the most consistent control. Our results demonstrate efficacy of registered herbicide formulations for P. calleryana control in two geographic locations and two habitat types. The need for development of integrated pest management programs for P. calleryana is discussed.

Type
Research Article
Creative Commons
This is a work of the US Government and is not subject to copyright protection within the United States. Published by Cambridge University Press on behalf of Weed Science Society of America.
Copyright
© USDA Forest Service, 2020

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Footnotes

Associate Editor: James K. Leary, University of Florida

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