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通过对8种中草药提取物及其混合物对莴苣霜霉病的抑制作用研究,以期筛选和研究对防治莴苣霜霉病有效的中药制剂。研究结果表明,8种中草药提取物及其混合物对莴苣霜霉病孢子的萌发及田间霜霉病发病抑制作用高于对照,差异达显著水平。无论是对霜霉病孢子萌发的抑制,还是田间霜霉病发病的抑制,中药混合物效果优于单个中药。对莴苣霜霉病孢子萌发抑制效果最好的是穿心莲∶厚朴∶牛蒡=2∶1∶1混合物;对苗期莴苣霜霉病保护效果和治疗效果最好的分别是穿心莲∶厚朴∶牛蒡=2∶1∶1和1∶1∶2处理。
By studying the inhibitory effects of eight Chinese herbal extracts and their mixtures on downy mildew, we hoped to screen and study the effective Chinese traditional medicine preparations for controlling lettuce downy mildew. The results showed that eight kinds of Chinese herbal extracts and their mixtures inhibited the germination of downy mildew spores and the incidence of field downy mildew in the lettuce, the difference was significant. Whether it is the inhibition of downy mildew spore germination, or the incidence of downy mildew in the field, Chinese medicine mixture is better than single Chinese medicine. On the lettuce downy mildew germination inhibitory effect best andrographis: Magnolia officinalis: burdock = 2: 1: mixture; on seedling lettuce downy mildew protective effect and the best treatment effect is respectively Andrographis: Magnoliaceae: burdock = 2: 1: 1 and 1: 1: 2.