LZH refines its laser approach to dealing with resistant weeds . 27?Jul?2020 Now testing the directed energy approach in the German "LURUU" research project with farmers and regional government. Grasses such as slender meadow foxtail and windgrass have become an acute problem on agricultural land. In the event of severe infestation, farmers are threatened with having to take agricultural fields out of production altogether. To cut herbicide resistance, lasers could ...