فعالية المکافحة الحيوية للبکتيريا Bacillus subtilis ضد الفطريات Fusarium oxysporum f. sp. lycopersici, F.solani, Rizhoctonia solani في المختبر والمشتل EFFECTIVENESS OF BIOLOGICAL CONTROL BY BACILLUS SUBTILIS AGAINST THE PLANT PATHOGENIC FUNGI FUSARIUM OXYSPORUM F. SP. LYCOPERSICI, F.SOLANI, RIZHOCTONIA SOLANI IN VITRO AND NURSERY