It's a pity that this result comes only after GMOs have engineered insecticides (and quite possibly herbicides) into plant genomes. Blasting pests with a laser is less harmful to human consumption than eating toxins – and gives organic farmers (or at least, organic farmers who are in it for the money) a new toy to play with to improve productivity.
I'm not sure what the final operating cost of a commercial version of these lasers will end up being – after all, you need energy to position and fire death lasers, and energy grids are already too heavily used by other industries. But we'll need a new label for consumers who don't want death lasers pointed around their food, and we'll need ways to protect insects and other friendly beasties who may get caught in the crossfire.
Star Wars on Weeds: Could Lasers Replace Herbicides?
Toxic chemicals kill unwanted weeds, but at a cost. Labor intensive organic methods won’t be adopted by industrial farms. Could lasers be the answer?