The soil-borne pathogen Setophoma terrestris is the causal agent of pink root of onion, one of the most challenging diseases in onion production. Conventional approaches for managing the disease like solarization, soil fumigation and crop rotation have not been proven effective enough. In this work, we evaluated the biocontrol capacity of Bacillus subtilis ALBA01 (BsA01) against S. terrestris, in a highly susceptible onion cultivar, both under greenhouse and field conditions. Disease incidence and severity were evaluated together with growth, photosynthesis among other physiological variables, and yield parameters. When compared with plants infected with the pathogen, those plants co-inoculated with BsA01 showed significantly less damage and levels of biocontrol above 50%. With regard to physiological parameters, plants challenged with S. terrestris and inoculated with BsA01 performed as well as the control non-infected plants revealing a growth promotion effect of BsA01 on onion plants.

土壤传播的病原体土生植物Setophoma terrestris是洋葱粉红色根的病因，洋葱粉红色根是洋葱生产中最具挑战性的疾病之一。事实证明，控制日晒，土壤熏蒸和轮作等疾病的常规方法不够有效。在这项工作中，我们评估了枯草芽孢杆菌ALBA01（BsA01）对沙雷氏菌的生防能力。在温室和田间条件下，在高度易感的洋葱品种中使用。评估疾病的发病率和严重程度，以及生长，光合作用以及其他生理变量和产量参数。当与感染病原体的植物相比时，与BsA01共同接种的那些植物显示出明显更少的损害和超过50％的生物防治水平。关于生理参数，具有攻击植物S.蒺藜并用BsA01进行接种以及控制非受感染的植物上露出洋葱植物BsA01的生长促进效果。