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Efficacy of five herbicide treatments for control of Pyrus calleryana

Formally Refereed
Authors: James T. Vogt, David R. Coyle, David Jenkins, Chris Barnes, Christopher Crowe, Scott Horn, Chip Bates, Francis A. Roesch
Year: 2020
Type: Scientific Journal
Station: Southern Research Station
Source: Invasive Plant Science and Management


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.


Aminopyralid, hexazinone, imazapyrisopropylammonium, invasive species, management, triclopyr


Vogt, James T.; Coyle, David R.; Jenkins, David; Barnes, Chris; Crowe, Christopher; Horn, Scott; Bates, Chip; Roesch, Francis A. 2020. Efficacy of five herbicide treatments for control of Pyrus calleryana . Invasive Plant Science and Management. 13(4): 252-257.