Abstract: Insecticide resistance in insect populations has been characterized as existing in a checkerboard pattern geographically. This is particularly problematic for public health professionals when a block of resistance occurs in high mosquito producing habitats. Identification of those habitats and characterizing the presence or absence of resistance is critical for a successful vector control program. The Sacramento-Yolo Mosquito Abatement District, located in the Central Valley of California encompasses 2,013 square miles which includes the capital city of Sacramento as well as many urbanized areas and, even in a drought year, 17,225 acres of rice. The results of our insecticide resistance detection and monitoring program using the CDC bottle bioassay will be presented with a focus on how urban micro habitat, rural crop practices and control product options can affect programmatic outcomes.
