Earth Rover’s Light-Pulse Robot Targets Weeds While Monitoring Crops

One robot for weeding and crop scouting

Earth Rover is bringing a low-energy approach to automated weed control into vegetable and specialty crop fields. Its CLAWS robot uses a concentrated pulse of light to kill individual weeds, while cameras collect crop data as the machine travels. The combination could help growers reduce reliance on manual labor and herbicides while tracking plant health and position.

The UK company calls CLAWS the Concentrated Light Autonomous Weeding and Scouting system. The robot identifies weeds, avoids crops and directs enough light at a weed’s meristem—the growing tissue—to heat and kill it. Front and rear cameras can also collect per-plant information, including crop counts, position and Normalized Difference Vegetation Index (NDVI), a measure used to assess crop health and vigor.

That dual function gives the equipment a role beyond removing weeds: it can gather field data during the same pass. Earth Rover says it has sold 10 pilot units, with another 15 being built. Customers are buying the machines outright, and the company plans to seek Series A funding next year to support expansion and development for crops beyond vegetables and salads.

Concentrated light with lower energy demand

CLAWS uses heat to damage a weed, an approach that has precedents in methods such as propane burners and lasers. Earth Rover’s distinction is how it concentrates the light: rather than using a collimated laser beam, the system converges light to a focal point, then lets it spread out. Chief executive James Miller says that beyond a set distance, the light becomes eye-safe.

Lower energy use is central to the design. The robot runs on solar power and batteries, and Earth Rover says it can work for up to 16 hours without a battery change. The company reports completing field trials over the summer without swapping batteries. Miller frames energy use per hectare and the speed of covering a field as key measures of operating cost: an autonomous machine can remove the need for an operator, tractor and diesel during weeding.

The approach also has a different operating profile from chemical control. Earth Rover says light treatment is not affected by soil moisture and can be used in rain or wind. It also works on weeds that resist herbicides. Those features may widen the conditions in which growers can treat weeds, though actual economics will depend on the farm’s existing costs and how much ground the robot can cover.

Designed around beds and close crop spacing

CLAWS was developed for vegetable, salad and specialty crop production, including bed-based and open-field systems. Its track width adjusts from 1.5 to 2 meters, covering many bed dimensions in those sectors. The platform can accommodate different bed heights and features such as ridges used for carrots. Earth Rover says its modular units can also be arranged for wider or otherwise unusual configurations.

Precision matters when weeds grow close to valuable crops. The company says the system can target within millimeters of a crop’s base. Its recognition software has been developed to distinguish emerging onions from nearby weeds, allowing the robot to treat the weed while leaving the crop untouched. That capability is relevant where young plants and weeds are difficult to separate by eye, though the company’s examples do not establish performance across every crop or field condition.

Grower economics and early sales

The initial business case came from organic growers, who typically rely on mechanical weeding in dry conditions or hand labor. Both options can bring cost and labor availability challenges. Earth Rover is now also hearing from conventional growers seeking alternatives where herbicides have become ineffective against resistant weeds or are no longer available for their use.

The robot costs around £150,000, with a discount available to early customers. Miller says reported payback periods range from one to three years, depending on farm size and existing weeding costs. Earth Rover designed the machine around a 100-hectare vegetable or salad farm, assuming average weed pressure of roughly 60 to 100 weeds per square meter. Some customers with farms of five or 15 hectares have also purchased units, which the company says can make economic sense in their circumstances.

Farmers have bought the equipment outright, used projects sponsored by food supply chain businesses to support purchases, or funded it as an asset. Earth Rover initially considered a weeding-as-a-service model, but says growers prefer to own the machine and choose when to use it. That preference puts more emphasis on equipment reliability, repairability and practical fit with existing farm operations.

Scaling the machine and widening its reach

Founded in 2017, Earth Rover has moved through multiple versions of its scouting, weeding and robotics systems. The company says it has spent the past four years taking the technology through alpha and beta development to its current pilot production model.

The product is patent-protected in the UK and US. Earth Rover says most components are readily available, while the steel structures are straightforward to manufacture. Its chairman is a fifth-generation farmer, and the company says the design reflects a need for equipment that can be repaired with basic tools. It has discussed higher-volume supply with component providers; assembling units quickly is currently its main production challenge.

The company has funded its development through a mix of equity investment and grant-supported projects. Its next stated step is a Series A raise to scale production and develop a version for broader-acreage cropping systems. Whether concentrated light can extend beyond the crops CLAWS was built for will depend on adapting the machine and its crop recognition to those field conditions. For now, its progress rests on a focused test: whether lower energy use, close targeting and crop monitoring can deliver a reliable return for growers facing rising pressure on weeding labor and herbicide options.