In Vitro Evaluation of Plant Extracts against Phytophthora Meadii Mcrae
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2007-02
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Abstract
The use of botanicals and other bioagents in the management of plant diseases is gaining importance. In the present study, acquous extracts of 20 plant species were tested against 20 isolates of Phytophthora meadll McRae causing fruit rot disease of areca palm. The plants commonly available In and around areca plantations were selected for this study. The extract was prepared macerating the plant tissue with equal quantity of distilled water and added in the basal medium of carrot agar to get 10 per cent concentration. The efficacy of different extracts was calculated based on the radial mycelial growth and sporangial production of the fungus. Among the tested plants, the extract of 'henna' {Lawsonla Inermls) and scared basil {Oclmum sanctum) caused maximum reduction In mycelial growth.The possibility of utilizing these plant extracts for control of soil population of Phytophthora species could be explored, especially where cocoa and black pepper are grown along with areca palms in the cropping system.
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Plantation Crops Research and Development in the New Millennium,(Proceedings of PLACROSYM XIV) CPCRI, Kasaragod 2002 524-526