Vector Control District Plans Experimental Mosquito Control Program

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Vector Control District Plans Experimental Mosquito Control Program

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Contributing Editor,  MyNewsLA.com,  2025.

Batches of irradiated male mosquitoes are slated for release Wednesday in Lake Elsinore with the goal of pairing the modified insects with as many females as possible to kill off the overall mosquito population, under an experimental program that apparently hasn’t generated concerns among public officials. The “Sterile Insect Technique Pilot Program” is being managed by the Northwest Mosquito & Vector Control District, which serves segments of western Riverside County. The district is believed to be the first countywide to inaugurate an SIT mosquito control program. Questions regarding when it was authorized, the estimated number of modified mosquitoes that will be released and any potential public health risks were not answered by the agency as of Tuesday afternoon. Lake Elsinore officials also did not respond to requests for comment.

The West Valley Mosquito & Vector Control District, which encompasses Ontario, Montclair and neighboring municipalities in San Bernardino County, was the first district in California to receive authorization from state regulators to initiate mosquito SIT releases last year, under a pilot program similar to that of the Northwest Mosquito & Vector Control District. It’s still unknown whether West Valley’s experimental program has netted any benefits. “Sterile male mosquitoes are released to mate with local females, and the resulting eggs are unable to hatch,” NMVCD said in a statement regarding the Lake Elsinore program. “The release of adult male mosquitoes will not increase local bite pressure, as only female mosquitoes bite.”