From The Los Angeles Daily News
September 27, 2017
Vector control agents conducted a pre-dawn raid on adult mosquitoes in the Sepulveda Basin on Wednesday to knock down the populations in an effort to reduce the spread of West Nile virus.
The truck-mounted, ultra-low volume fogging in the Sepulveda Basin recreation area should not affect any visitors to the area who use the trails, said Kelly Middleton, a spokeswoman for the Greater Los Angeles County Vector Control District.
She said the product used to eradicate the insects is a synthetic, man-made chemical based compound called pyrethrins found in chrysanthemums.
“One of the reasons we use these products is it’s very effective against these (mosquitoes),” she said. “There are no concerns for exposure for people. The pesticide is only effective a short period of time.”