Spatial and temporal dynamics of weed populations in crop rotations under the influence of site-specific weed control

Experiments were conducted on five arable fields to study the spatial and temporal dynamics of weed populations under the influence of site-specific weed control. Four fields were sown in a winter wheat, winter barley, maize and sugar beet rotation and one field was sown to continuous maize. Data on spatial weed population dynamics were collected from 1997 until 2002 and entered in a weed population model. Based on the results of the six- year study, the model was used to predict weed seedling density in the following years. The results of this study showed, that a prediction of temporal weed population dynamics is possible by use of a simple weed population model.