Strawberry leaf spot caused by Xanthomonas fragariae is one of the main limiting diseases of crops in Brazil, but there are not efficient control strategies. Additionally, the global demand for pesticide-free foods has stimulated research to find low toxicity products to control plant pathogens. Thus, strawberry plants were sprayed with Lentinula edodes polysaccharides (PSHII), propolis extracts (GP1), acibenzolar-s-methyl (ASM) or distilled water (control) and inoculated with the bacterium. Leaf samples were collected to determine phenylalanine ammonia lyase (PAL) and superoxide dismutase (SOD) activities. Antimicrobial activity was checked, based on the effect of the products on CFU and bacterial biofilm. In the cv. Albion, the propolis source GP1 reduced the AUDPC by more than 95%, compared to control, when applied 3 days before inoculation, but PSHII did not differ from control. For cv. San Andreas, GP1 significantly reduced the disease only at 7 days after inoculation. PSHII or ASM promoted significant reduction in all evaluations. Only GP1 inhibited the CFU and biofilm formation of the bacterium and promoted increases in PAL and SOD activities, while PSHII and ASM increased SOD activity. The data suggest that such products have potential for use in programs for control of strawberry diseases.

草莓黄单胞菌引起的草莓叶斑病是巴西农作物的主要限制性病害之一，但缺乏有效的防治策略。此外，全球对无农药食品的需求刺激了寻找低毒产品来控制植物病原体的研究。因此，草莓植株喷洒香菇多糖 (PSHII)、蜂胶提取物 (GP1)、acibenzolar-s-methyl (ASM) 或蒸馏水（对照）并接种细菌。收集叶子样品以确定苯丙氨酸解氨酶 (PAL) 和超氧化物歧化酶 (SOD) 的活性。根据产品对 CFU 和细菌生物膜的影响，检查抗菌活性。在简历中。Albion，蜂胶源 GP1 在接种前 3 天使用时，与对照相比，AUDPC 降低了 95% 以上，但 PSHII 与对照没有区别。对于简历。San Andreas, GP1 仅在接种后 7 天显着减轻了疾病。PSHII 或 ASM 促进了所有评估的显着减少。只有 GP1 抑制细菌的 CFU 和生物膜形成并促进 PAL 和 SOD 活性的增加，而 PSHII 和 ASM 增加 SOD 活性。