Abstract: With yellow trap board as monitoring tool,this paper studied the quantitative dynamics of striped flea beetle (SFB) P.striolata adults in field.The results showed that from Nov.2002 to Oct.2003,there were four insect occurrence peaks and three vales,which meant that SFB occured a year around,with no evident overwintering phenomena.The occurrence of SFB population was not significantly affected by rainfall or temperature,while joint effect of the two factors was existed.The quantitative dynamics of SFB were various on different host plants,as well as in different growth stages of vegetables,indicating the host discrimination of SFB adults.