In Florida, a devastating disease threatens the nation’s nearly half-a-billion dollar avocado industry. That’s leading researchers to use extreme measures: drones and dogs.
Avocado grove owner Art Ballard said his trees mysteriously started dying one day. Then it was discovered they had a disease called laurel wilt and had to be cut down. Until now, there was no way to tell the trees were even sick before it was too late, reports CBS News correspondent Vicente Arenas.
