Opisina arenosella Walker is an invasive pest of China in recent years,and causes serious harm to a variety of palm plants.This study was conducted to understand the spatial distribution pattern and sampling techniques of the O.arenosellalarvae,and an investigation with stratified random sampling was conducted on the larval number on Cocos nucifera L.in Danzhou,Hainan Province in December 2015.The spatial distribution pattern of the O.arenosellalarvae on C.nuciferaleaves was studied by aggregation indices,t...