The risks of synthetic fungicides propel a shift to biological plant disease control. Attention has been focused on screening plant secondary metabolites for plant-derived pesticides. Flavonoids are abundant and structurally diverse in citrus peels. The co-cultivation of four fungal pathogens with flavonoid extracts from the peels of unveiled a substantial inhibitory effect of these compounds, with polymethoxyflavones identified as the primary contributors. The microencapsulated citrus flavonoids using sodium alginate and gelatin showed 60% efficiency against cucumber wilt in potted seedlings, highlighting the potential of citrus flavonoids for biocontrol in field applications.

中文翻译：

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柑橘类黄酮：对病原真菌的抑制活性和生物防治潜力

合成杀菌剂的风险推动了向生物植物病害控制的转变。人们的注意力集中在筛选植物次生代谢物中的植物源农药。柑橘皮中的类黄酮含量丰富且结构多样。四种真菌病原体与果皮中的类黄酮提取物的共培养揭示了这些化合物的显着抑制作用，其中多甲氧基黄酮被确定为主要贡献者。使用海藻酸钠和明胶制成的微囊柑橘类黄酮对盆栽幼苗中的黄瓜枯萎病显示出 60% 的效率，凸显了柑橘类黄酮在田间应用中生物防治的潜力。