Bitter melon ( Momordica charantia ), a kind of typical traditional medicine herb ,can be used as food and medicine. In this paper, extract of Bitter melon was tested for its antimicrobial activities, including investigation of its antimicrobial spectrum, MIC value; Varieties with strongest activities were selected after comparing the differences of antimicrobial activities of different bitter melon varieties in large quantities by monitoring their antimicrobial activities. Active substances were extracted ...