This study demonstrated that there is an effective inhibition of garlic bulb crude extract on mycelia growth of F. fulva, germination of spores and on tomato leaves In vitro and seedlings. The inhibitive effect is proportional to the concentration of garlic bulb crude extract: the higher the concentration of garlic bulb crude extract showed the more inhibitive effects. These effects are in accordance with the results of Song (2004) and Su & Cheng (2009), who reported that garlic extract had effective inhibition on Fusarium oxysporum f. sp. cucumerinum, F. oxysporumSchl. f. sp. nioeum (E. F. Smith) Snyder & Hansen and Phytophthora capsici at 100 mg ml-1, 500 mg ml-1 and 200 mg ml-1, respectively. Daniela et al, (2008) also indicated that allicin in garlic juice inhibited the germination of sporangia and cysts and subsequent germ tube growth by Phytophthora infestans both In vitro and In vivo conditions on the leaf surface at 50 μg ml-1. Similar studies were also carried out by Raouf & Khalil (2001) on the effects of aqueous extracts of 20 different plants on spore germination and vegetative growth of two pathogenic, terrestrial and zoo-sporic fungi.