History and features of the invasion of the alien plant Wedelia triloba L. into Guangdong

Guangdong is a province with most alien species. Wedelia triloba L., which is the major invasive alien plant in the area of Guangdong, poses a serious threat to the native plants and ecosystem. Its invasion event in Guangdong can be divided into three periods: selective harboring and colonization during the introduction and utilization; large -scale outbreak resulted in serious environmental damages; the control and rational utilization. The rapid diffusion of wedelia in Guangdong is mainly due to blindly planting, causing harm primarily by allelopathy.