EN
The aim of presented studies was the use of aerial photography to determine long-term permanent areas of weed infestation. Aerial photos are becoming a more available form of information on spatial diversity of agricultural field production. They are commonly used for drawing application maps, which are the basis for precision farming. Available GIS (geographical information system) tools enables rectification of aerial photos, which were taken by digital cameras. Consequently, the prepared photomaterials can then be analysed by geo-processing operations. Weed infestation of a given field, especially visible in latter stages of crops in the growing season, allows relatively easy to identify large, dispersed, and small clusters of weeds. Comparing aerial photos taken over a certain amount of years, allows to develop strategies of active (target) plant protection. The paper presents a low-altitude remote sensing method and stages of persistent weed infestation, including zones of mapping for precision farming. The fields of winter wheat and winter rape of the ZD IUNG – PIB Osiny (51°27’N, 22°1’E), were photographed in the period of 2005–2007.