The fact that dogs can detect human diseases has already been thoroughly documented. Now, a new study shows that our best friends can also sniff out some plant diseases.
Laurel wilt disease has already killed more than 300 million laurel trees in the United States alone. It affects several plants, including the avocado tree, which is an extremely important crop in places like Florida. When the disease strikes, it kills off the trees quite quickly — by the time symptoms have become apparent, the disease is almost impossible to contain. It also tends to spread quickly and cause widespread damage.