Pesticide treatment index is increasing in Denmark despite the expected and desired goal of decreasing the number of treatments to 1.7 by the end of 2009. Optimisation of herbicide choice, dosage, mechanical methods and spraying technique have not counteracted the general increase in treatment index. Therefore, there is a need for new thinking and a technological leap if the goal have to be obtain. The paper presents three categories of spraying robots with different levels of resolution and precision.