Scientists train dogs to sniff out a crop disease called citrus greening that has hit orange, lemon and grapefruit orchards in Florida, California and Texas
In one experiment in a Texas grapefruit orchard, trained dogs were accurate 95 percent of the time in distinguishing between newly infected trees and healthy ones.
Scientists trained dogs to sniff out a crop disease called citrus greening that has hit orange, lemon and grapefruit orchards in Florida, California and Texas. The dogs can detect it weeks to years before it shows up on tree leaves and roots, the researchers report. Dog sleuths are also faster, cheaper and more accurate than people collecting hundreds of leaves for lab analysis, according to the study in the Proceedings of National Academies of Sciences. Citrus greening — also called huanglongbing — is caused by a bacteria that is spread by a tiny insect that feeds on the leaves and stems of citrus trees. Once a tree is infected, there's no cure.
Matteo Garbelotto, who studies plants at the University of California, Berkeley, says the new research elevates the study of dog sleuths in orchards from anecdotal to field-tested, showing that dogs can detect an infection well before current methods. Garbelotto has been involved in similar research but had no role in new study.
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