Brazilian peppertree (Schinus terebinthifolia Raddi) is an aggressive shrub that infests more than 280,000 ha in Florida. Individual plant treatments (IPT), including basal bark and cut stump application with triclopyr butoxyethylester and triethylamine formulations, respectively, have been used for decades. While they are both effective, resprouting can occur, which requires retreatment for control. Recent research on other woody invasive plants has indicated additional non-crop herbicides used in natural areas can be effective with these IPT techniques and therefore warrant testing on S. terebinthifolia. In 2018 and 2019, basal bark and cut stump studies were conducted at Cape Canaveral Air Force Station in natural areas infested with S. terebinthifolia. In the basal bark application studies, we found aminocyclopyrachlor applied at 12 and 24 g L−1 and triclopyr acid applied at 34 and 69 g L−1 each provided 100% defoliation of multistemmed S. terebinthifolia individuals with a mean root collar diameter up to 20.2 cm at 360 d after treatment (DAT). These were not different from triclopyr ester applied at 96 g L−1. Imazamox applied at 30 g L−1 resulted in 86% defoliation at 360 DAT. However, we observed formulation incompatibility when imazamox was mixed with basal bark oil which may limit its utility. In cut stump studies, we found aminocyclopyrachlor and aminopyralid each individually applied at 6, 12, and 24 g L−1, resulted in stump mortality that was not different from the commercial standard triclopyr amine applied at 180 g L−1. Similar results were found for a triclopyr acid formulation applied at 86 and 172 g L−1 and imazamox applied at 60 g L−1. For both treatment techniques, we found that alternative treatments provided control at lower herbicide concentrations than triclopyr ester and amine commercial standards. These results advance our understanding of IPT and expand access to additional effective herbicide options for S. terebinthifolia management.

巴西胡椒树 ( Schinus terebinthifolia Raddi) 是一种侵略性灌木​​，在佛罗里达州侵染了超过 280,000 公顷的土地。单独的植物处理（IPT），包括分别使用绿草定丁氧基乙酯和三乙胺制剂施用基部树皮和切树桩，已经使用了数十年。虽然它们都有效，但可能会发生重新发芽，这需要重新治疗才能控制。最近对其他木本入侵植物的研究表明，在自然区域使用的其他非农作物除草剂可以通过这些 IPT 技术有效，因此有必要对S. terebinthifolia进行测试。2018 年和 2019 年，在卡纳维拉尔角空军基地受S. terebinthifolia侵染的自然区域进行了基部树皮和砍伐树桩研究。在基部树皮应用研究中，我们发现以 12 和 24 g L -1施用的氨基环吡草胺以及以 34 和 69 g L -1施用的绿草吡酸分别使平均根颈直径高达 100% 的多茎S. terebinthifolia个体脱叶。治疗后 360 天 (DAT) 时 20.2 厘米。这些与以96g L -1施用的绿草吡酯没有不同。以30 g L -1施用的甲氧咪草烟导致在360 DAT时86%的落叶。然而，我们观察到当甲咪草烟与基底树皮油混合时配方不相容，这可能限制其实用性。在切割树桩研究中，我们发现环吡草胺和氨基吡啶酸分别以 6、12 和 24 g L -1施用，导致树桩死亡率与以 180 g L -1施用的商业标准绿草吡胺没有不同。对于以86和172g L -1施用的绿草吡酸制剂和以60g L -1施用的甲氧咪草烟发现了类似的结果。对于这两种处理技术，我们发现替代处理可以在比绿草定酯和胺商业标准更低的除草剂浓度下提供控制。这些结果增进了我们对 IPT 的理解，并扩大了对S. terebinthifolia管理的其他有效除草剂选择的使用范围。