It is helpful to establish effective measures to prevent and delay the spread of thedisease by investigating the seasonal dynamics of pinewood nematode(PN),Bursaphelenchus xylophilus, carried by Japanese pine sawyer adult (JPS),Monochamus alternatus Hope. From July12to November21,2012, APF-Ⅰchemical attractant was used to monitor the temporal dynamic of PN carrying by JPSin Lianjiang,Fijian in this paper. The result shows:(1)96.5%of JPS attracted byAPF-Ⅰ chemical attractant were carrying PN;(2) PN were carr...