The San Joaquin County Mosquito and Vector Control District will be spraying various agricultural areas throughout Manteca and Ripon starting today.

According to a schedule released by the agency, ground spraying for adult mosquitoes using Evergreen 60-6 and/or Fyfanon ULV – two insecticides approved for use on a variety of crops – will begin in the northern portion of the county this morning before making its way to South Rural Manteca Thursday night.

Between 8 and 11 p.m. on Thursday, sprayers will focuses on an area of South Manteca that extends north to Division Road, west to Two Rivers Road, south to the San Joaquin and Stanislaus Rivers and east to the Stanislaus River.

They will also, during the same time period spray an area of southwest rural Ripon that extends 1 mile north of W. Ripon Road, west to Austin Road, South to Moncure Road, and east to S. Highland Ave. and Mohler Road. An area around the Ripon Sewer Plant where Stockton Avenue intersects with Doak Boulevard will also be sprayed.

Last month the first reported case of West Nile Virus was reported in San Joaquin County this year when a Stockton man tested positive for the disease. Mosquitoes that are known to carry Dengue Fever were also discovered in Fresno and Madera Counties last month.

Spraying – both on the ground and aerially – is carried out to control the spread of the diseases.