Abstract: Continuous outbreak of Dictyoploca Japonica occurred in Naxi District, Luzhou City, Sichuan Province, thus causing serious damage to Sorbus pohuashanensis and Cinnamomum camphora. To prevent and control D. Japonica damage, the occurrence regularity and morphological characteristics ere observed and analyzed,and prevention and control measures were proposed for different periods and methods against D. Japonica, aiming to provide reference for the effective control.