Inspectors from the California Department of Food and Agriculture were going home-to-home inspecting trees after a devastating citrus disease was detected in La Habra.
Huanglongbing, or HLB, is not harmful to humans, but can kill citrus plants.
"If this continues to spread this could destroy the citrus industry of California," said Orange County Agriculture Commissioner Jeff Croy.
A routine survey by the state found one tree in La Habra with HLB and two insects with the bacteria in Anaheim.
"This bacteria is a disease that will kill the citrus tree, there is no cure. It's 100 percent kill," Croy explained.
The disease has popped up in Hacienda Heights, San Gabriel and Cerritos in the past.
The state inspectors were looking for any signs of HLB and collected samples to take back to their lab.
"They're working on a treatment method to find any diseased trees and remove those immediately so the disease cannot spread," Croy said.
HLB spreads through tiny bugs called Asian Citrus Psyllid, which are all over Orange County.