These Farmers Kill Weeds With Lasers

A camera spots a plant. A computer decides whether it belongs there. A laser aims at its growing point. All while a tractor moves through a field of crops. Carbon Robotics' LaserWeeder is already working on farms. But how does it tell a crop from a weed, what happens when it gets the decision wrong, and does the cost actually make sense? This Hidden Wins documentary goes beyond the demonstration: how the machinery works, what Cornell and Rutgers researchers found, why some weeds are harder to kill, and what one farm's economics can—and cannot—tell us. The university results discussed were reported in 2025. The cost comparison comes from a March 2024 Western Growers case study of an earlier machine and includes remaining hand labour. Manufacturer claims are identified separately. Demonstration footage includes US farms and clearly identified Australian material; it is not footage of the university experiments. CHAPTERS 00:00 A flash between the leaves 00:46 Why weeds are so expensive 02:03 A target just millimeters away 02:29 From prototype to farm equipment 03:30 See, identify, locate, treat 04:54 The part of a weed that matters 05:48 What university trials actually found 07:39 The real cost per acre 09:02 Speed is not the whole story 10:18 What the laser cannot solve 11:41 What progress looks like