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Japanese beetle breeding population found in Sun City Roseville; state treating about 200 properties

Placer County Agricultural Commission · April 13, 2026
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Summary

Agriculture Department staff reported detection of an A‑rated invasive Japanese beetle in Sun City Roseville with 30+ pests found and coordinated insecticide treatments covering roughly 200 properties including local golf courses.

Agricultural Commissioner Josh Huntsinger informed the commission that a breeding population of Japanese beetle was detected in Sun City Roseville, reporting "30+ pests were found meaning a breeding population existed." The department has deployed traps countywide and the state is conducting insecticide treatments on turf at approximately 200 properties in the immediate area.

Huntsinger said local partners are working with homeowners and commercial property operators, including Woodcreek Oaks, to treat golf courses and other turf areas as part of an eradication and containment effort. Commissioners were advised that the Japanese beetle can damage rose bushes and a wide range of crops and that the department will continue monitoring and outreach.