On a recent trip to Florida we saw a dog in action locating avocado trees that had been attacked by the Redbay ambrosia beetle which carries the fungus Raffalea lauricola which is a similar pest/disease complex that is found in California with the Polyphagous/Kuroshio Shot Hole Borer and Fusarium Euwallacea that leads to Fusasrium Wilt in avocado. The fungus gives off a certain odor that the dog is trained to smell and along with the human trainer goes around the orchard to identify infected trees. The trees can then be removed so that they don't act as a reservoir of infection that can be spread to other trees by the beetle. The dog seemed to work pretty fast. Depending on the acreage covered, the handler says they charge $150 per acre to find diseased trees. This can happen before more advanced symptoms show up that humans can see. This technology could be used in identifying other tree diseases, such as Huanglongbing, citrus canker and Phytophthora, along with others.
Dog has found a laurel wilt infected tree that will soon be removed. (Tim Spann).
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