County to conduct mosquito-fighting larvicide drop

San Diego County is scheduled to conduct a routine aerial larvicide drop, May 15 and 16, on up to 52 local waterways to help stop mosquitoes from potentially spreading diseases like West Nile virus. The only site in Fallbrook is at Lake Rancho Viejo.

County officials said helicopter larvicide drops will be done Wednesday, and Thursday if necessary, to cover nearly 1,400 acres of hard-to-reach potential mosquito breeding areas.

The county started using helicopters to drop solid, granular larvicide on hard-to-reach areas of standing water in rivers, streams, ponds and other waterways where mosqu...