The ability of some medicinal plants was explored to control bacterial canker of tomato caused by Clavibacter michiganensis subsp. michiganensis. The plants tested included Peganum harmala, Allium sativum, Withania somnifera, Melia azedarach, Calotropis procera, Mentha piperita and Nerium oleander. Aqueous extracts of P. harmala and M. piperita proved to be very effective under in vitro conditions against Clavibacter michiganensis subsp. michiganensis. In in vivo studies, the highest dose of dried powder of P. harmala and M. piperita kg⁻¹ of soil decreased disease severity significantly. Other yield-contributing parameters were also enhanced by the application of dried powder and no phytotoxicity was observed at given concentrations. Alkaloids, tannins, glycosides, flavonoids and saponins were detected in aqueous extracts of P. harmala, W. somnifera, M. azedarach, C. procera and M. piperita. Dried powders of P. harmala and M. piperita could be incorporated as an integral part in the integrated disease management programs against Clavibacter michiganensis subsp. michiganensis.

中文翻译：

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一些水性植物提取物对Clavibacter Michiganensis亚种的生物功效。密歇根州（Smith），番茄细菌性溃疡病的病因

探索了一些药用植物控制由密歇根氏杆菌亚种引起的番茄细菌性溃疡病的能力。密歇根州。所测试的植物包括Peganum harmala，葱属，Withania somnifera，Melia azedarach，Calotropis procera，Mentha piperita和夹竹桃。在体外条件下，P。harmala和M. piperita的水提物被证明对密歇根氏杆菌属亚种非常有效。密歇根州。在体内研究中，最高剂量的P. harmala和M. piperita干粉kg ^-1的土壤可显着降低疾病的严重性。通过使用干粉还提高了其他产量贡献参数，在给定浓度下未观察到植物毒性。在P. harmala，W。somnifera，M。azedarach，C。procera和M. piperita的水提物中检测到生物碱，单宁，糖苷，类黄酮和皂苷。P. harmala和M. piperita的干粉可以作为针对密歇根氏杆菌亚种的综合疾病管理计划的组成部分。密歇根州。