Shasta Mosquito and Vector Control District

(530) 365-3768 | Our Location

News and Updates

Current District Weather Conditions

Contact Info

Shasta Mosquito and Vector Control
19200 Latona Road
Anderson, CA 96007
Phone: (530) 365-3768
Fax: (530) 365-0305


Shasta Mosquito and Vector Control District constantly monitors mosquito numbers, environmental conditions, and disease occurrence in order to make the best possible decisions about appropriate levels of mosquito control within the District.

18 “New Jersey” Light traps are distributed throughout the District from April through October. These traps are collected weekly and the mosquitoes are identified and counted to provide an accurate assessment of mosquito populations throughout the District all through the mosquito season. Since encephalitis diseases occur more frequently in bird populations than among humans, five sentinel chicken flocks are kept in different areas of the District to monitor encephalitis virus activity. Blood samples are taken from the chickens every two weeks and sent to a state lab to be tested for the presence of antibodies to encephalitis viruses.


In addition, the District runs 41 CO2 baited EVS traps throughout the District aimed at collecting live mosquitoes on a weekly basis that are sent to the state lab to be directly tested for the presence of encephalitis viruses. Detection of virus activity in the District prompts intensified and focused mosquito control to ensure the protection of the health of residents in areas where the risk of the spread of the disease is high. 


Finally, the District deploys “Gravid traps” in various locations to catch mosquitoes for virus testing. These traps are designed to collect mosquitoes that are “gravid” or carrying eggs. The gravid female mosquitoes seek out the stagnant water in the trap for depositing their eggs and get sucked into the trap by a fan. This type of trap is very good for collecting Culex Pipiens mosquitoes, a potential vector of West Nile Virus.  Since these mosquitoes must have blood-fed in order to produce eggs, they are more likely than non-gravid mosquitoes to have acquired mosquito-borne diseases from an infected host.