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Integrated Vector Management (IVM)

The Orange County Mosquito and Vector Control District's programs are based on scientifically planned management tactics and control strategies that reduce the abundance of vectors in a timely manner. This method is referred to as “integrated vector management” (IVM).

IVM incorporates five basic methods:

  • Public information and education
  • Mosquito and vector surveillance
  • Biological control
  • Physical control
  • Microbial and chemical control

The approach seeks to improve the efficacy, cost-effectiveness, ecological soundness and sustainability of vector control activities.

The key objectives of Integrated Vector Management include:

  • The selection of proven vector control methods based on knowledge of vector biology and ecology, and disease transmission.
  • Utilizing of a range of interventions, separately or in combination and often synergistically, integrating all available and effective measures, whether chemical, biological, or environmental.
  • Collaborating within the health sector and with other public and private sectors that impact vector control.
  • Engaging local communities and other stakeholders.
  • Knowledge and compliance with public health regulatory and legislative frameworks.
  • The rational use of insecticides.
May contain: person, human, grass, and plant

Public Information and Education

Our awareness, outreach and education programs educate and inform the public about mosquito and rodent control and prevention methods. The District utilizes media and video, community events and presentations to educate residents in Orange County. Additionally, the District educates the chilren of Orange County through a classroom program and exhibit at the Discovery Cube. 

Learn more here

Mosquito Surveillance 

May contain: person and human

The District has over 100 mosquito traps placed throughout the County. The trapped mosquitoes are quantified for abundance and tested for possible diseases they could be carrying (i.e. West Nile virus, St. Louis and Western Equine Encephalitis)


The Orange County Mosquito and Vector Control District uses two different types of traps: a carbon dioxide baited trap and a gravid mosquito trap. 

Learn more here

Mosquito Control 

The District uses many different means of controlling mosquitoes, these include: Source Reduction, Biological Control and Chemical Control. 


Manipulating or eliminating potential mosquito breeding sources can provide a dramatic reduction in mosquito populations. 

Learn the various ways you can eliminate breeding sources around your home here.

May contain: animal, fish, and carp

The District's primary source of biological control is the mosquito fish (Gambusia affinis). These fish are indispensable to our mosquito control program. They eat mosquito larvae as soon as they hatch from their eggs. Mosquito fish are provided free of charge at our District and are great for stocking ornamental ponds, unused or "out-of-order" swimming pools and animal watering troughs. 

Learn more about mosquitofish here 


The District uses chemical control products when source reduction and biological control are not possible or efficacious.  Chemical control of mosquitoes is often grouped into larviciding and adulticiding. 

To learn more about adult mosquito applications, see the treatment schedule listed here. 

To learn more about mosquito IVM practices please refer to the District's IVM Manual.