The Chemical Cost of Food - How UV Light Is Killing The Nasties

Scott Mathias
Jun 15
2 min read

The image of autonomous robots moving silently through crop fields at night may look like something from science fiction. Yet it could represent one of the most significant shifts in food production since the introduction of chemical pesticides.

California-based TRIC Robotics has developed autonomous field robots that use UV-C light to suppress pathogens, fungal diseases and pests without applying conventional chemical sprays. Operating mostly at night, the robots expose crops to precisely controlled doses of ultraviolet light, disrupting disease cycles while reducing the need for chemical intervention.

The timing is significant.

According to the UN Food and Agriculture Organisation, agriculture now uses approximately 3.7 billion kilograms of pesticide active ingredients every year, with global pesticide use having doubled since 1990. The global crop protection sector is valued at tens of billions of dollars annually and continues to grow.

At the same time, concerns around pesticide exposure remain. A major international review estimated approximately 385 million cases of unintentional pesticide poisoning globally each year, resulting in around 11,000 deaths, while ongoing research continues to examine links between pesticide exposure and a range of neurological, reproductive and chronic health conditions.

Against this backdrop, technologies such as autonomous UV-C robots are attracting increasing attention. Rather than asking growers to produce less, they seek to maintain productivity while reducing chemical inputs.

The broader question may no longer be whether agriculture can reduce chemical use. It may be whether robotics, artificial intelligence and photonics can achieve the same outcomes more effectively.

For consumers seeking cleaner food, and growers facing rising costs and labour shortages, the future of crop protection may increasingly involve intelligence rather than chemistry.

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