Updated: March 08, 2021 13:48 IST The drones themselves are basic, but they are steered by smart technology aided by special cameras that scan the airspace in greenhouses. Share Article AAA The drones instantly kill the moths by flying into them, destroying them in midair. | Photo Credit: AP The drones themselves are basic, but they are steered by smart technology aided by special cameras that scan the airspace in greenhouses. (Subscribe to our Today's Cache newsletter for a quick snapshot of top 5 tech stories. Click here to subscribe for free.) Dutch cress grower Rob Baan has enlisted high-tech helpers to tackle a pest in his greenhouses: palm-sized drones seek and destroy moths that produce caterpillars that can chew up his crops.