Schuster C, Konstantinidou-Doltsinis S, Schmitt A
JKI, Institute for Biological Control, Darmstadt, Germany.
Commun Agric Appl Biol Sci. 2010;75(4):531-40.
In previous investigations an ethanolic plant extract from Glycyrrhiza glabra (2.5% w/v) showed 100% efficacy against late blight (Phytophthora infestans) on detached tomato leaves. Based on these findings, the objective of this work was to investigate the effect of this extract against different important plant pathogenic fungi. Tests were carried out on potted plants. Against P. infestans, efficacies of 75% and 58% were achieved on tomato and potato plants with 5% extract concentration, respectively. Against another Oomycete, Pseudoperonospora cubensis, on cucumber, application of a 2.5% extract led to an efficacy of above 90%. The EC50-value was calculated to be 0.5% In a trial on beans against bean rust (Uromyces appendiculatus), G. glabra extract (5% concentration) showed 92% efficacy. In contrast, against powdery mildew on cucumber (Podosphaera xanthii), no disease reduction was found. Overall, the results indicate a high potential for the extract of G. glabra to control a number of important plant pathogens.
在之前的研究中，光果甘草的乙醇植物提取物（2.5% w/v）对离体番茄叶片上的晚疫病（致病疫霉）显示出100%的防治效果。基于这些发现，本研究的目的是探究该提取物对不同重要植物病原真菌的作用。试验在盆栽植物上进行。对于致病疫霉，5%提取物浓度下，对番茄和马铃薯植株的防治效果分别达到75%和58%。对于另一种卵菌——黄瓜霜霉病菌，在黄瓜上施用2.5%的提取物，防治效果超过90%。计算得出的EC50值为0.5%。在针对菜豆锈病（疣顶单胞锈菌）的菜豆试验中，光果甘草提取物（5%浓度）显示出92%的防治效果。相比之下，在黄瓜白粉病（瓜单囊壳白粉菌）试验中，未发现病害减轻情况。总体而言，结果表明光果甘草提取物在防治多种重要植物病原体方面具有很大潜力。
