A new study from Virginia Tech found that ordinary dogs trained by their owners detected spotted lanternfly egg masses more than twice as often as experienced human searchers in densely vegetated areas. Researchers say community dog-handler teams could become a powerful early-detection tool.
Vineyard workers and plant scientists thought they had found every spotted lanternfly egg mass hiding among the grapevines. Then Xephyr, a 12-year-old Boston terrier, sat down and pawed insistently at a vine they had already cleared.
They had missed one. She had not.
“She was adamant,” Debi Persing, Xephyr’s owner, said in a news release. “She’s a machine at finding odor.”
Xephyr’s nose-to-the-ground work at a Maryland vineyard was part of a first-of-its-kind study led by researchers at Virginia Tech’s College of Agriculture and Life Sciences. The research, published June 9 in the journal PeerJ, pitted community dog-handler teams — regular people and their pets — against trained human specialists searching for spotted lanternfly egg masses under real-world field conditions. The dogs won, and it wasn’t particularly close.
Dogs Outperform Experts in the Field
The spotted lanternfly has now spread across 19 U.S. states, threatening vineyards, orchards and forests. Catching infestations early is critical, but the insect’s egg masses are notoriously hard to spot and professional detection dog units are scarce.
To explore whether everyday dogs could help fill that gap, lead researcher Erica Feuerbacher, a professor in Virginia Tech’s School of Animal Sciences, and co-author Sally Dickinson, a postdoctoral researcher in the School of Animal Sciences, teamed up with Virginia Tech grape disease pathologist Mizuho Nita and colleagues from Texas Tech University. The team built on a 2025 study that had shown trained pets could locate egg masses in controlled environments. This time, the question was whether those skills would hold up under messier, real-world circumstances.
“It’s one thing to show dogs can do this in training exercises,” Dickinson said in the news release. “It’s another to put them out in the environment, where there are lots of other odors and distractions, and see that they can still perform.”
Twenty-six dog-handler teams were first evaluated in distance-testing exercises. Nine of those teams then searched half-acre plots where egg mass locations were completely unknown. Trained human searchers — including plant disease specialists — combed each site first. Dog teams followed, each search capped at 10 minutes.
In heavily vegetated areas, dogs found an average of three egg-mass locations each, compared to just 1.3 locations per human searcher. That’s a margin of more than two to one.
How Close Do the Dogs Need to Be?
The study also mapped out the effective detection range for the dogs. Performance was strongest when egg masses were within roughly 16 feet of the search path, with detections falling to zero beyond 50 feet.
“The distance testing helps us understand how these dogs need to be deployed,” Feuerbacher added. “Handlers need to move methodically through an area, so dogs stay close enough to detect the odor.”
Another practical finding: dogs trained on non-living egg masses were still able to identify live ones in the field. That means new detection teams can complete their training without accidentally transporting and spreading the invasive pest — a major biosecurity concern.
Why It Matters for Students and Communities
The implications go well beyond professional pest management. Feuerbacher envisions a decentralized, community-driven network of dog-handler teams that could mobilize in regions where the spotted lanternfly has not yet arrived.
“What this means is that we can turn to everyday dogs and their owners and train them as a flexible early detection force,” added Feuerbacher. “In places where the spotted lanternfly hasn’t reached yet, teams could train in advance and be ready to detect it before it becomes a major infestation.”
For college students interested in environmental science, agriculture or animal behavior, the research opens an accessible entry point into conservation work. You don’t need a specially bred working dog or years of professional training — just a motivated pet and a handler willing to put in the time.
“As we face more environmental issues, more agricultural issues — hitchhiker insects, invasive species, diseases — having a widespread network of trained dogs is exciting,” Feuerbacher added. “It really opens people’s eyes to what their dogs are capable of. Your dog, regardless of its breed, could do this.”
What’s Next: Sniffing Out Plant Disease
The team is already looking beyond the spotted lanternfly. Their next target is Pierce’s disease, a bacterial infection capable of severely damaging and killing grapevines. If community dog-handler teams can reliably detect that threat as well, the potential applications for protecting American agriculture could grow considerably.
As for Xephyr, she still trains on scent detection several times a week. Persing said she would eagerly return to the vineyard.
“I guess sometimes the nose is more important than the eyes,” Persing added. “She’s my best girl.”
Source: Virginia Tech