Southern California cities are preparing for battle against bloodsucking pests this summer as mosquito season picks up. The City of La Habra—which has historically had high mosquito and West Nile virus activity—is conducting its first of many large-scale mosquito sprays June 30. Mosquitoes are responsible for more human deaths than any other creature in the world, killing hundreds of thousands of people every year, according to the Centers for Disease Control and Prevention. The Orange County Mosquito and Vector Control District (OCMVCD) is kicking off its control efforts with a wide-area larvicide spray (WALS) treatment in La Habra. “This treatment will prevent mosquitoes from emerging into biting adults and will help prevent the spread of mosquito-borne diseases,” Rick Howard, OCMVCD district manager, said in a statement. The larvicide treatment will target water sources and prevent immature mosquitos from developing into adult mosquitoes. Efforts will focus on residential areas within La Habra. The spraying treatment will occur between …