Abstract
Cephalosporium maydis is a soil borne and wide spread fungus in Egypt causing Late Wilt disease in Maize (Zea mays). This study tested methanol extracts of some marine algae such as Jania rubens, Corallina elongata, Laurencia obtusa, red algae as Gelidium crinale, green algae as Enteromorpha compressa, Ulva fasciata and cyanobacreria as Anabaena oryzae against the previous fungus. The Plackett-Burman design was used to investigate the most significant BG11 medium components that affect as antifungal activities of A. oryzae methanol extracts. The results indicated that metabolic extract of U. fasciata gave the best antifungal activates at both concentrations (50 and 100 mg/ml) followed by A. oryzae. The results estimated Plackett-Burman design reported that NaNO3 and k(2)HPO(4) were the most significant nutrients caused the C. maydis inhibition, but the other nutrients have nonsignifacnt impact. U. fasciata and A. oryzae had highly antifungal activities and the BG11 media components enhanced the anti-fungal activities of A. oryzae.