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《Northern Horticulture》 2009-07
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Screening on Inhibitory Effect of Plant Extracts Against Phytophthora infestans

CAO Jing1,MA Yan-zhi2 (1.College of Agricultural Science,Liaocheng University,Liaocheng,Shandong 252059,China;2.Department of Biology,Tangshan Teacher's College,Tangshan,Hebei 063000,China)  
Twenty species of plant ethanol extracts were tested for their inhibiting effects against P.infestans in this study.Preliminary results showed that 16 plant extracts showed significant inhibitory effects on hyphae growth of P.infestans.The inhibition rate ranges from 13.75%~100%.for example,the inhibition ratio of Scuteuaria baicalensis Georgi,Dendronthema morifolium(Ramat)Tzvel,Rheum officinale Baill and nutgall extracts could also strongly inhibit the hyphae growth of P.infestans at the same level as "Ridomil" at 3000 times dilution.and significantly stronger than the other three extracts.
【CateGory Index】: S436.412
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