Exotic Asian knotweeds are among the worst invasive plant species in a large part of the North Hemisphere. Most studies have focused on management and control technique at the local scale. But researches at landscape scale are still very scarce, and factors governing spatial and temporal dynamic of invasive knotweeds at landscape scale are still poorly known. Dynarp project aims to evaluate the respective roles of biotic and abiotic factors, of management techniques, and of the factors linked to social perception, in the spatial and temporal dynamic of exotic Asian knotweeds at the landscape scale. These scientific results should help managers to improve knotweed control at this scale. The method relies on complementary cross-disciplinary approaches: •Remote sensing techniques with current and past images, from satellite and aerial photography, and monitoring over several years of knotweed patches with ultra-high resolution unmanned aerial vehicles, •Field sampling of knotweed patch limits with accurate GPS; of abiotic factors (soil, slope, etc.); of biotic factors with functional characteristics of the local and surrounding plant communities; and of knotweed performance through biological traits, •Questionnaires for knotweed managers, in order to describe accurately management techniques and to understand the reason of their management choices. Investigations are done along linear transport-infrastructures, including several motorways, navigable canals, rivers and railways. The first results of the analysis of diachronic series of aerial images and readings on fifty invaded sites are showing two opposite trends of spatial expansion or reduction, resulting from different ecological and management processes.