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Escalon Sees Influx Of Nuisance Mosquitoes

A nuisance mosquito, Aedes nigromaculis, has been spreading in areas throughout Escalon. This mosquito species is not associated with mosquito-borne diseases such as West Nile Virus.

This mosquitoes’ habitat is primarily irrigated pastures and fields. Females are most active at dusk but will bite during the day. Eggs can be dormant on the ground throughout winter only to hatch as temperatures increase during the late spring and summer months. Adult mosquitoes emerge after water stands in over-irrigated fields for more than three days. Often, they hatch in large numbers generating many complaints from residents.

San Joaquin County Mosquito and Vector Control District is taking action to reduce this nuisance mosquito species in Escalon.

“Recently, we treated large areas of land for adult mosquitoes in the early morning and late evening hours. During the day, our technicians are treating the immature stages of mosquitoes in the water. We will continue to assess the situation and treat adult mosquitoes until the population is receded,” said Aaron Devencenzi, Public Information Officer with the District.

District officials encourage people in Escalon to visit the website at for accurate and timely information on spray locations and times. For questions, call San Joaquin County Mosquito and Vector Control District at 209-982-4675 or 1-800-300-4675.