In this paper, the antifungal activities of the extracts of Merremia eberhardtii (Convolvulaceae) against mycelial growth of rice pathogenic fungi: Colletotrichum capsici (C1)
Pyricularia solani (P1) and Pyricularia oryzae (P2) were investigated in both invivo and invitro mediums. The results showed that the extract from flowers had stronger antifungal activities than that from leaves and stems, and the inhibitory percentage of extracts from flowers, leaves and stems (at concentration of 80X1/4) against C1 was 97.36 percent
81.57 percent
78.94 percent, respectively, against P1 was 77.78 percent
75.56 percent
and 73.33 percent, respectively, and against P2 was 78.72 percent
80.85 percent
and 76.59 percent, respectively. The result aso showed that the C1 was strongest inhibited and the optimum concentration for inhibition was at concentration of 80X1/4, the ability of inhibition may be decreased if the concentration above or below this value.