Dispersal of the leafhopper vector of X-disease,Paraphlepsius irroratus(Say) within and into peach and cherry orchards was monitored by a mark, release, and recapture experiment. Field-collected adults were marked using fluorescent dyes and released at locations in and outside of two orchard sites. The marking method did not significantly affect leafhopper flight activity or survival. Dispersal was monitored using yellow sticky board traps for 21 d following each release, and the data were fitted to equations. The overall leafhopper recapture rate within 60 m was 2.35%. Dispersal rate for the first and second generations averaged 2.9 and 3.8 m/d. Wind was the major factor influencing leafhopper dispersal direction, as mean dispersal direction correlated significantly with mean wind direction (r= 0.94,P≤ 0.05). Temperature affected leafhopper activity; this was particularly apparent with second-generation adults active at temperatures approximately 11°C less than first-generation adults. There was no significant difference in the overall dispersal behavior between first and second generations. Implications of this movement to the spread of X-disease are discussed.