Pest Management Science (2008) 64, 203-207

Deng Yecheng, Yang Zhen, Yu Yanzhen and Bi Xiulian (2008)
Inhibitory activity against plant pathogenic fungi of extracts from Myoporum bontioides A. Gray and indentification of active ingredients
Pest Management Science 64 (2), 203-207
Abstract: BACKGROUND: In order to understand the bioactivity of Myoporum bontioides A. Gray against plant pathogens and determine its active ingredients, the inhibitory activities of methanol extracts from M. bontioides against Fusarium oxysporum f. sp. niveum (E. F. Smith) Snyder and Hansen, Pestalotia mangiferae P. Henn., Thielaviopsis paradoxa (De Seynes) v. Hohnel, Colletotrichum musae (Berk. and M. A. Curtis) v. Arx, Alternaria alternata (Fr.) Keissler, Mycosphaerella sentina (Fr.) Schroter and Sphaceloma fawcettii Jenk. were evaluated using a growth rate method, and the active ingredient was isolated by activity-directed isolation and identified by determination and analysis of IR, ¹H NMR, ¹³C NMR and mass spectra and correlative physical constants.
RESULTS: The results showed that the extracts from stems and leaves of M. bontioides exhibited inhibitory activity against the seven fungi, with > 58% inhibition at 10 g L^-1 after 72 h. The active compound was isolated and identified as (-)-epingaione, and showed inhibitory activity against the above seven fungi. The inhibitory activity against P. mangiferae was the highest, with an EC₅₀ value of 77 mg L^-1. The EC₅₀ values against the other six fungi were 147-245 mg L^-1. (-)-Epingaione also inhibited spore germination of F. oxysporum f. sp. niveum, T. paradoxa and S. fawcettii.
CONCLUSION: (-)-Epingaione demonstrated broad-spectrum inhibitory activity against plant pathogenic fungi and is promising for exploitation as a fungicide.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Thielaviopsis paradoxa
	Alternaria alternata
	Colletotrichum musae
	Fusarium oxysporum f.sp. niveum
	Elsinoë fawcettii
	Pestalotiopsis mangiferae
	Fusarium oxysporum