The ability of three herbaceous plants (Diplotaxis tenuifolia (L.) DC., Eruca vesicaria L. and Raphanus raphanistrum L.) from Iberian wood pastures to reduce Phytophthora cinnamomi Rands pathogen populations through allelopathic relationships is studied. The inhibitory capacity of their aqueous root extracts (AREs) on mycelial growth and production of P. cinnamomi reproductive structures is analysed in vitro. In addition, Quercus seedlings were grown in infested by P. cinnamomi-soils and with the presence or absence of allelopathic and susceptible herb species to the pathogen to assess the defensive chemical response of Quercus seedlings through their leaf phenolic compounds. Results show a strong inhibitory capacity of AREs on P. cinnamomi activity in vitro and a protective effect of these herb species on Quercus plants against P. cinnamomiin vivo. D. tenuifolia would be especially suited for biological control in the pathogen suppression.

中文翻译：

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三种草本植物对致病疫霉的致病性作用-致病疫霉在地中海木草场中引起严重的橡树衰落

研究了来自伊比利亚牧草的三种草本植物（Diplotaxis tenuifolia（L.）DC。，Eruca vesicaria L.和Raphanus raphanistrum L.）通过化感作用关系减少兰州疫霉的致病菌种群的能力。在体外分析了其水根提取物（AREs）对菌丝体生长和肉桂假单胞菌生殖结构产生的抑制能力。此外，栎木幼苗生长在被肉桂青霉菌土壤侵染的情况下，并且在对病原体有化感和易感草本植物存在或不存在的情况下，评估了其的防御化学反应。栎苗通过其叶中的酚类化合物。结果显示，AREs在体外对肉桂的活性具有很强的抑制能力，并且这些草药物种对栎属植物的体内对肉桂的保护作用。D. tenuifolia将特别适用于病原体抑制的生物防治。