Modelling Herbicide Use in Genetically
Modified Herbicide Resistant Crops - 2 9 Final commentThe models described in this report are first attempts to integrate knowledge about herbicide-tolerant crops with known agricultural practices. It should be emphasized that the models are preliminary and needs validation before any reliable predictions can be made about long-term consequences. The models are restricted to simulate one crop rotation with sugarbeet and one rotation with oilseed rape. The predictions from the models are therefore only valid for the chosen combination of crops, weeds and herbicide strategies . To elaborate on the questions raised during the work requires hard data in that the data material in literature often fall short of what is needed in a simulation model Baring these precautions in mind, we believe that the qualified predictions from this study are an improvement to just guessing, and the approach in our models could be used in revealing potential risks of growing herbicide-tolerant crops and thus prevent problems with unwise herbicide use and resistance in weeds and volunteers. |