Precision-weeding specialist Carbon Robotics has revamped its ultra-accurate LaserWeeder to make it lighter, faster and more affordable.

Like the original model, the G2 combines computer vision, artificial intelligence and laser technology to detect and zap weeds in a growing crop.

But the latest iteration can do so twice as fast, thanks to upgraded Nvidia graphic processing units (GPUs) and more powerful 240w lasers.

See also: Video: Retrofit Mojow tractor kit automates arable fieldwork

These are triggered once a series of high-resolution cameras have detected a weed, with the thermal energy they produce “exploding” the plant’s cell wall at the meristem.

The G2 is also lighter than its predecessor, by 25% in the case of the 6m model, which allows it to be carried on a smaller, cheaper tractor to reduce soil compaction and allow owners to get onto fields earlier in the season.

And the modular design of the framework means it can be adapted to suit a broader range of farm sizes, field configurations, crop types and, crucially, budgets.

Width options start at 2m with the 1,928kg G2 200, which can cover a modest 0.16-0.28ha/hour.

At the other end of the spectrum is the 18.3m G2 800, which weighs 6,350kg and is good for 1.21-2.43ha/hour.

By eliminating the need for hand labour, herbicides and mechanical weed control, the US firm reckons the machines can cut farmers’ costs by up to 80% and deliver a return on investment in one to three years.