Ferhout et al, 1999,10 reported that M. furfur has more sensitivity to cinnamaldehyde and cinnamon oil with MIC at the range of 1e 1000 mg/ml. But our experiment with bark methanolic extract shows MIC at 1 mg/ml against M. furfur. Though it is a crude extract, the result is comparable to cinnamaldehyde and cinnamon oil. The ZOI also shows 26 mm diameter against M. furfur.