الفهرس 
Different species of plantsOnly 14 pages are availabe for public view
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Abstract
As a part of environmentally safe system for plant disease control, natural plant products have been widely used for controlling plant pathogens. The objectives of this study were to determine the effect of certain plant extracts and oils of 40 higher plant species belonging to 22 plant families against some fungi causing seedling damping-off and rootrot disease namely, Rhizoctonia solani, Macrophomina ph~~eoha, Sclerotium rolfii and Fusarium spp. The results revealed that: 1- Leaf aqueous extract of Bougainvillaea spectabilis inhibited the growth of Fusarium poae, F. oxysporum and F. moniliforme by 94.4,94.4 and 76.4%, respectively. It decreased the dry weight of F. poae andF. oxysporum by 85 and 67%, and their sporulation by 100 and 99.8% respectively. 2- Citrus auranticum extract inhibited the growth of F. solani by 87.1, . . when six extracts decreased the fungus dry weight by ratios ranged fiom 76.4 to 100%. 3- Extract of Agave siselana inhibited linear growth of M phaseolina by 50.9% when 20 plant extracts decreased the dry weight of fungus by ratios ranged from 77.6 to 96%. 4- Seventeen plant extract inhibited the growth of S. rolfsii by ratios ranged fiom 75.7 to 94.3% when all tested extracts decreased the fungus dry weight by ratios ranged fiom 76.5 to loo%, except Portulaca aleracea extract which increased it.