Detailed situation of Popillia japonica in USA
The paper from Alm et al. (1996) mainly presents studies on the efficacy of pheromone traps for Popillia japonica (EPPO A1 quarantine pest), but also gives detailed information on the situation of this pest in USA. The beetle is now established in most states situated east of the Mississippi river, but not in Mississippi and Florida (Connecticut, Delaware, Georgia, Illinois, Indiana, Iowa, Kentucky, Maryland, Massachusetts, Missouri, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, West Virginia). Isolated infestations have been reported in Alabama*, Maine, Michigan, Nebraska*, Kansas*, Minnesota*, Wisconsin*. Localized populations have been eradicated in the past in California, Oregon and Nevada.
* New detailed record
Sources
Alm, S.R.; Yeh, T.; Dawson, C.G.; Klein, M.G. (1996) Evaluation of trapped beetle repellency, trap height, and string pheromone dispensers on Japanese beetle captures (Coleoptera: Scarabaeidae).
Environmental Entomology, 25(6), 1274-1278.