ROSEVILLE, Calif. – Unusually high mosquito trap counts trigger localized treatment efforts in northwest Roseville.

“These high trap numbers reflect what our technicians and residents in the area have observed,” stated Joel Buettner, General Manager of the Placer Mosquito and Vector Control District. Residents and District staff have reported swarms of mosquitoes exhibiting aggressive biting behavior during the dayand evening.

Due to this latest development, the District has scheduled a ground-based adult mosquito treatment forthe early morning of August 19 in the following area of Roseville:

  • Amoruso Way north of West Sunset Blvd, including all side streets

Since several factors affect spraying activities, such as weather and wind conditions, the District encourages Placer residents to check the District website at for any changes to the spraying schedule.

With West Nile virus spreading to more populated areas of the county, the Placer Mosquito and Vector Control District advises the public to implement the 3 Ds of protection:

  • Drain any standing water that may produce mosquitoes.
  • Defend yourself and your home by using an effective insect repellent, dressing protectively when outside, and making sure screens on doors and windows are in good condition.
  • Contact the District for any additional help controlling mosquitoes around your home, or to report potential mosquito breeding sources, such as neglected swimming pools.

For more information, Placer County residents may contact the Placer Mosquito and Vector Control District at (888) 768-2343 or

2010 Placer County West Nile virus activity update:
3 dead birds, O sentinel chickens, 18 mosquito samples have tested positive for West Nile Virus to date.

Contact: Ada Barros, Public Information Officer (916) 380-5480.