Listeria monocytogenes is a major foodbome pathogen responsible for the disease listeriosis.Effective methods for reducing L.monocytogenes in foods would reduce the likelihood of foodborne outbreaks of listeriosis,and decrease economic losses to the food industry.Crude ethanolic extracts from 50 edible Thai plants were screened for inhibitory effects on isolated strains and type strain of L.monocytogenes by the well assay technique.Ethanolic extracts of Mui (Micromelum minutum),Khanun (Artocarpus heterophyllus),Di pli (Piper retrofractum) and Fak thong (Cucurbita moschata) which revealed listerial growth inhibition were applied to cooked pork to determine their antimicrobial activities against L.monocytogenes.