Abstract: The morphological character, biology, and natural enemies of Pseudopha copteron caharium were studied. In the meantime, chemical control was carried out against the pest. It has 7-9 overlapping generations in a year, the first generation adults appeared in late April, and there are three adult peaks during early July to early September. In addition, experiments showed that the best chemical to control this pest was Meothrin, it could result in 96. SM control effect in the next day after spraying, the second was Fenvalerata,93. 8% the next day, and the rest-2.5% Decis, 40% Omethoate and 80% Dichlorvos was all between 81%-90%. Many kinds of natural enemies played important roles in sup pression of the population development of the pest. There were beetles,chrysopas, cheroidea,spiders and predatory mites, of which beetles were dominant. The entomogenous fungus Metarhizium was also first introduced to control this pest.

Key words: Pseudophacopteron caharium , olive, Metarhizium