2011 Annual Report - Sacramento-Yolo Mosquito & Vector Control ...

Physical ControlIn 2011, the Department managed thirty beaver related project locations. Department staffresponded to three new locations that were surveyed and monitored in addition to twentyseven existing locations from previous years. Six previous sites were determined to be resolvedand no longer needed to be monitored.QUANTITYNUMBER OF NOTICES3530252015105014121086420PLANS RECEIVED2009 2010 2011POOL FINAL NOTICES2009 2010 2011Staff worked closely with the United States Bureau of Reclamation in developing a seriesof agreements, permits, and environmental analyses to reduce mosquito populations onReclamation owned properties within the California Delta, within the District’s boundaries.Managed Wetland ProgramThe practice of flooding previously dry land, during the early fall season for the purposes ofattracting waterfowl for conservation and recreational purposes creates favorable mosquitodevelopment habitat. High temperatures may promote rapid mosquito development as well asamplification of some vector-born viruses (e.g. West Nile Virus). In addition, dense emergentvegetation and relatively slow speed of flooding during the fall may also increase the numbersof mosquitoes produced, and impede the success of other mosquito control practices suchas the use of larvicides and mosquitofish. The District works throughout the year with publicand private landowners of waterfowl hunted and other preserved properties to implementBMPs that will reduce mosquito breeding or enhance mosquito control activities during majorwater events such as early flooding. The District meets annually with wetland managers todevelop annual management plans and to coordinate all irrigation and flooding activities.In addition to implementing BMPs, the Department administered the tiered fall flooding costshare program designed to discourage early flooding prior to October 1st of each year. In2011 seven wetland properties were billed for mosquito control costs under the cost shareprogram. The wetland program requires a significant amount of staff time to properly monitorand respond to site changes that zone technicians experience on a weekly basis throughoutthe season. Wetland managers routinely request advice from the Ecological ManagementDepartment to assist with maintaining their habitat goals while reducing mosquito production.Agriculture ProgramThe Department responded to various technician requests to reduce standing water in oraround irrigated agricultural lands. Often off site drainage issues are resolved by reducingirrigation runoff, and encouraging sound BMP implementation.Urban/Industrial ProgramStaff inspected all cemeteries within the District on a routine basis. No major violations werenoted with minor issues resolved with brief site meetings with cemetery management.Swimming Pool/Enforcement ProgramThe District has a swimming pool enforcement program that involves numerous attempts tocontact the pool owners to gain access for the purpose of treating the pool with mosquitolarvicides and mosquito fish that offer long term mosquito control. Within this program,District policies direct the Ecological Management Department to pursue legal access andenforcement when all other communication attempts have failed. The Department respondedto 15 Final Notice requests from zone supervisors. The Final Notice letter typically resolves theaccess issue, as was the case with all but one case in 2011. One Inspection and Abatementwarrant was received and executed.Need caption.20 Sacramento–Yolo Mosquito & Vector Control District