Mosquito Control & Other Vectors
Preventing Mosquitoes in Your Backyard

Simple tasks done on a regular basis will help protect you around your property against mosquitoes.

Did you know that most mosquitoes lay "egg rafts" and that each one can contain between 100 to 400 eggs?

It only takes mosquitoes approximately seven days to go from egg to adult mosquito. Therefore, here are some easy steps to help control mosquitoes in your backyard. Every week, dump and scrub containers that hold standing water. Keep rain gutters free of debris, keep decorative fountains operational or drain the water, change water in animal watering dishes and bird baths often. 


Ornamental Ponds

Stock with mosquitofish. Add goldfish for looks if desired. Avoid spraying with garden insect sprays. Remove leaves and thin out pond lilies. Keep water level up. Screen inlet of recirculation pump. Chlorine kills fish-- transfer fish to glass bowl when cleaning pond. If pond is no longer desired, break holes in bottom and fill with dirt or sand.

Concrete or Plastic Swimming Pools

Operate filter and skimmer everyday to remove mosquito egg rafts and larvae. Provide drainage for filter and pump sumps. Chlorine will NOT kill mosquito larvae. If pool cover is used, keep it tightly sealed. Remove rainwater from top of pool cover. Stock unused or "out-of-order" pools with mosquitofish. Report neglected neighborhood pools anonymously to the District. Call the District at (209) 982-4675

Boats, Kayaks & Canoes

Prevent accumulation of bilge water and rain water. Store small boats, kayaks and canoes upside down or cover to keep out the rain and water from sprinklers.

Other kinds of Containers

Remove and dispose of all unused containers that will collect rain or water from sprinklers.

  • Cans
  • Jars
  • Barrels
  • Old Tires
  • Buckets
  • Flower pots
  • Old tires
  • Rain Barrels/drums should have tight fitting small gauge screen to prevent mosquito access.
  • Toys.

Home gardeners rooting plant cuttings in vases, buckets, etc. should change water every week. Usable containers should be stored upside down.

Protect Yourself

  • Cover up: When practical, wear long sleeves and pants when outdoors
  • Screens: Make sure doors and windows have screens that fit tightly and do not have holes
  • Use insect repellent: Apply repellent with active ingredients DEET, picaridin, IR3535, or oil of lemon eucalyptus to exposed skin and/or clothing (as directed on the product label)

For additional repellent information, follow this link to Centers for Disease Control and Prevention

Call San Joaquin County Mosquito and Vector Control District for additional information or to request service at (209) 982-4675 or 1-800-300-4675.