County of Monmouth

For Immediate Release:
September 17, 2021

County to combat West Nile Virus
Mosquito Control will spray in Manalapan on Sept. 18

MANALAPAN, NJ – The Monmouth County Mosquito Control will be conducting a mosquito spraying on Saturday, Sept. 18 from 4-6 a.m. due to evidence of West Nile virus in the area.

The treatment area will include residential streets north of Symmes Road and south of Milford Brook between Tennent Road and U.S. Highway 9. The County will be spraying “Duet Dual-Action” which contains two pesticides called Prallethrin and Sumithrin, and a synergistic compound called piperonyl butoxide which increases the effectiveness of the pesticides.

“West Nile virus activity is higher than normal statewide this year and spraying to control the mosquito population is one of the most effective ways to defend against it,” said Commissioner Deputy Director Susan M. Kiley. “We advise residents to remain indoors, if possible, with windows shut and window air conditioners closed to outside air during the spraying. We recommend keeping your pets along with their food and water dishes indoors. Children’s toys should also be brought inside as an extra precaution.”

Pyrethroids have been recommended for Ultra-Low-Volume (ULV) mosquito control in New Jersey by Rutgers, The State University of New Jersey. The U.S. Environmental Protection Agency’s (EPA) current evaluation considers pyrethroid-containing products to be slightly toxic with minimal potential risk to people when used properly as part of an integrated mosquito control program.

“West Nile virus can infect anyone and can cause severe illness which may include fever, headache, body aches and in some cases, a rash. There is no specific treatment for the West Nile virus, so we remind residents to ‘Fight the Bite’ by using EPA-registered insect repellent, wearing light colored clothes with long sleeves and pants, when possible, limit time outdoors during dusk and dawn when mosquitos are most active, and drain standing water from gutters, old tires and other containers,” said Deputy Director Kiley.

If you would like to read more about the Monmouth County Mosquito Control, go to

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