Abstract
AbstractCallery pear (Pyrus calleryanaDecne.) 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 againstP. calleryanain old-field areas and loblolly pine (Pinus taedaL.) understory. Basal bark applications (triclopyr, triclopyr + aminopyralid), foliar applications (glyphosate, imazapyr), and a soil application (hexazinone) effectively killedP. calleryanawith 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 forP. calleryanacontrol in two geographic locations and two habitat types. The need for development of integrated pest management programs forP. calleryanais discussed.
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