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Pakistan Journal of Biological Sciences
Year: 2005  |  Volume: 8  |  Issue: 9  |  Page No.: 1284 - 1289

Antifungal Effects of Plant Extracts on Seed-borne Fungi of Wheat Seed Regarding Seed Germination, Seedling Health and Vigour Index

M.M. Hasan, S.P. Chowdhury, Shahidul Alam, B. Hossain and M.S. Alam    

Abstract: Ten plant extracts, such as rhizome of Zingiber officinale, bulb of Allium sativum, Allium cepa, leaves of Adhatoda vesica, Lawsonia alba, Azadirachta indica, Achyranthes aspera, stem of Cuscuta reflexa, root of Vinca rosea and seeds of Nigella sativa were tested for their efficacy in vitro against seed-borne fungi of wheat. All the plant extracts significantly reduced the incidence of seed-borne fungi; increased seed germination; number of healthy seedlings and vigour index. Alcoholic extracts of neem (Azadirachta indica) and garlic (Allium sativum) completely controlled the intensity of Bipolaris sorokiniana, Fusarium sp., Aspergillus sp., Penicillium sp. and Rhizopus sp. after the treatment on wheat seeds. Next to garlic and neem, V. rosea extract showed good inhibition and 1.40% intensity of B. sorokiniana followed by bulb extract of A. cepa and leaf extract of A. aspera (1.53 and 1.53%). Water extract of test plants also showed good antifungal effects against seed-borne fungi of wheat. Treated seeds of wheat by the extract of A. indica gave 99.33% seed germination, which is 16.86% higher over untreated control. The highest vigour index (1936, 2194; 1826, 2223 and 1871, 2174) was recorded after the application with alcoholic and water extracts of rhizome of ginger, bulb of garlic and leaf of neem on seeds of wheat while the lowest was in untreated control. The highest (86.95%) and the lowest (13.05%) healthy and infected seedlings were recorded when the seeds were treated with neem extract. Next to neem extract, garlic extract treated wheat seeds gave 84.70% healthy seedlings and 15.13% infected seedlings, respectively.

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