Different solvent extracts from 11 microalgae,crude grease of Pyramidomonas delicatula and its elution fractions in crude grease through silica gel column chromatography were tested using the agar disc diffusion method for antimicrobial activities against three plant pathogen.As a result,Pseudomonas solanacoarum was most sensitive to the microalgae extracts.The ether extracts from P.delicatula had the strongest antimicrobial activities against Pyricularia oryzae among the all solvent extracts.The crude grea...