1 hour ago · Nature · hide · 0 comments

AI image is for illustration purposes only. USDA researchers in South Texas built a battery-powered sprayer, hid it at a fence crossing where wild nilgai antelope squeeze through the wire, and loaded the tank with billions of microscopic parasitic worms suspended in water. When an antelope walked through the gap, an ultrasonic sensor detected its movement, an onboard computer started the pump, and the machine sprayed the animal’s belly and legs with living roundworms that kill ticks. The target was the southern cattle fever tick. The tick carries bovine babesiosis, a blood disease that could devastate the American cattle industry if it spreads beyond the quarantine zone along the Rio Grande. Cattle can be gathered and dipped. Nilgai cannot. A nilgai antelope stands five feet at the shoulder, weighs up to 600 pounds, jumps fences, and does not cooperate with livestock handling in any form. The USDA had been shooting them from helicopters at Laguna Atascosa National Wildlife Refuge,…

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