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Articles

Assessment of the bioregulatory activity of the leaf juices of higher plants in Al-Taif, Saudi Arabia against Fusarium solani, Phytophthora spp. and Rhizoctonia solani

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Pages 1064-1071 | Received 29 Apr 2008, Accepted 29 May 2008, Published online: 03 Aug 2010
 

Abstract

Resistance to conventional fungicides causes poor disease control in agriculture. Natural products from plants have great potential as novel fungicide sources for controlling pathogenic fungi. In this study the antipathogenic activity of the leaf juices of 11 plant species (Chenopodium ambrosioides, Pulicaria vulgaris, Lavandula pubescens, Lavandula dentata, Ageratum conyzoides, Ficus retusa, Zizyphus nummularia, Acacia tortilis, Phragmanthera sp. Aff. Rufescens, Lawsonia alba and Olea europaea) were evaluated in vitro against three plant pathogenic fungi (Fusarium solani, Phytophthora spp. and Rhizoctonia solani). Plate assays showed that the leaf aqueous juices have antifungal activity against these fungi. The aqueous extracts of Pulicaria vulgaris, Lavandula dentata, Ageratum conyzoides, Ficus retusa, Zizyphus nummularia, Acacia tortilis, Phragmanthera sp. Aff. Rufescens (when associated with Acacia tortilis), Lawsonia alba and Olea europaea exhibited antifungal properties against Fusarium solani, Phytophthora spp. and Rhizoctonia solani with variable degrees. On the other hand, Chenopodium ambrosioides, Lavandula pubescens and Phragmanthera sp. Aff. Rufescens (when associated with Zizyphus nummularia) did not exhibit any fungitoxicity. All these observations suggest the possible exploitation of Chenopodium oil as a potential botanical fungitoxicant in ecofriendly control of post-harvest biodeterioration of food commodities from storage fungi.

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