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.

中文翻译：

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5种除草剂处理对梨梨的防治效果

Callery梨（梨Decne.) 在美国迅速蔓延，在过去的二十年里作为一种严重的入侵性害虫受到关注。推荐的控制方法包括叶面、基部树皮、切割树桩和喷洒除草剂，但很少有已发表的研究具有重复的功效数据。测试了四种容易获得的除草活性成分和两种活性成分的组合对抗P. calleryana在老田地区和火炬松（松属L.) 林下。基树皮施用（绿草定、绿草定 + 氨基吡咯烷）、叶面施用（草甘膦、灭草烟）和土壤施用（六嗪酮）有效杀灭P. calleryana一个地点的六嗪酮除外，那里的降雨量可能不是最佳的。草甘膦的叶面施用提供了最一致的控制。我们的结果证明了注册除草剂配方的功效P. calleryana控制两个地理位置和两种栖息地类型。需要制定综合虫害管理计划P. calleryana被讨论。