A small citrus tree covered in adult Asian citrus psyllids

A small citrus tree covered in adult Asian citrus psyllids.

Photos: Asian citrus psyllids infest trees in Dinuba, Calif.

These photos were taken of an Asian citrus psyllid discovery in Dinuba, Calif. on Sept. 10. Officials said several residential trees were "infested" with adult and nymph-stage psyllids. Photos courtesy of the Fresno County Department of Agriculture.