Recent Rains Keep Mosquito Control Team Buzzing

July 30, 2018
Print Friendly, PDF & Email

By Jay Cook | 

TINTON FALLS – A rejuvenating summer rain is one of Mother Nature’s best friends.

But long stretches of rain, like the ones that have recently swept Monmouth County, could be Public Enemy No. 1 for the Monmouth County Mosquito Control Division. It means more waves of those pesky, blood-sucking pests are on the way.

Inspector Jake Jones looks through dozens of collected samples to identify mosquitos recovered throughout various Monmouth County neighborhoods. Photo by Jay Cook

“Everybody asks ‘how bad of a season is it going to be?’ ” Vicki Thompson, the department’s acting superintendent told The Two River Times this week. “It all depends on rain. It was crazy in early June and into July. Things were just starting to dry up but it’s back again.”

It’s up to Thompson and her team to zap Monmouth County’s mosquito population. The county division is tasked with testing, treating and analyzing the county’s 665 square miles for nearly eight months of the year, from the vast wooded tracts in Howell to the salt marshes along the Bayshore.

There are 63 different species of mosquitoes across the state and 46 of them call Monmouth County home. Some only attack birds, others just feed on humans. Only the females bite, as they use harvested blood and protein to produce eggs. Their daily nourishment comes from nectar and sugars, Thompson noted.

The most aggressive mosquito here is the Asian tiger, which “comes out during the day and will actually chase you into your house and attack you,” said Monmouth County Public Health Officer Christopher Merkel.

Mosquitos also carry a number of different diseases that can be problematic for county health officials. West Nile virus and eastern equine encephalitis are the top two local dangers. Last year, 16 of 948 breeding pools tested positive for those two diseases. But there were only two human cases of West Nile virus, and an adult control-spraying program followed. The locations of those two cases are subject to privacy through Health Insurance Portability and Accountability Act (HIPAA) provisions.

That was part of a busy year in 2017. The division received 713 requests for service – down 19 from the yearly average – and employees conducted over 9,800 inspections of known mosquito breeding grounds. That was the highest number since 2000.

These recent rainstorms could cause a boom in West Nile virus populations, Thompson warned. According to the most recent data from the state Department of Health, there have been 65 positive West Nile virus pools statewide, compared to only 49 at this time last year. Monmouth County has tested two positive pools so far this year. At this point last year, one pool tested positive.


With a budget of $1.1 million and 26 full-time and part-time staff, Thompson and her team have to make the most out of every field trip.

Monmouth County’s Mosquito Control Division has a busy summer ahead. Pictured with its helicopter in Tinton Falls are acting superintendent Vicki Thompson, left, inspector Jake Jones and pilot Brian Gosnell. Photo by Jay Cook

Their biggest weapon is the county helicopter. Depending on the weather and wind, pilot Brian Gosnell spends hours at the controls flying low and landing in unreachable locations to drop pesticides.

Gosnell and a ground transport team covered over 1,000 acres of the shore in just two days last week. That mission spanned Monmouth Beach, Rumson, Middletown, Hazlet, Keyport, Union Beach and Aberdeen. It took seven hours to release about 4,000-5,000 pounds of larvicide in targeted areas.

Helicopter sightings have popped up recently on social media with residents asking why they’re flying so low to the ground. To be effective, Gosnell flies about 20 feet above the treetops and regularly lands in the salt marshes. Those areas are typically inaccessible by truck or foot.

“It’s a lot of surveillance, a lot of timing, a little voodoo and magic,” Gosnell said with a smirk. “But it all works.”

There is a difference between what the Monmouth County Mosquito Control Division does and what small businesses in the mosquito control industry do. The county’s free service primarily focuses on larviciding at the source, whereas private companies typically fight the adult population by spraying, Thompson said.

But those sources could still have water resting in something as small as a bottle cap to a wheelbarrow that wasn’t turned upside down before a rainstorm.

“There may be companies that (larvicide) as well, but my sense is a lot of them just do fogging for the adults,” she said. “They’ll spray and you’ll be fine maybe for a week or so, but if that water’s still there pumping out mosquitos, you’ll get a new batch.”

Smaller, ground-based larvicides have proven to be effective. Inspectors deploy up to four different mosquito traps on residential properties to capture and test adults. One popular rig is a light trap baited with dry ice which simulates mammal exhalation as the dry ice melts. Another trap called The Sentinel even secretes an odor mimicking human sweat.

Sometimes the inspectors will even look to fish for help. In contained areas, they’ll deploy killifish or gambusia, also known as mosquitofish, to go in and harvest on the larval populations.


Residents should know the county mosquito division welcomes tips and requests from the public. Residents can place a call to the offices on Wayside Road at 732-542- 3630, or fill out a form on the county’s website at

A misting machine that’s used to kill adult mosquito populations waits to be loaded onto the back of a pickup truck. It’s one of the many tools the division has at its disposal. Photo by Jay Cook

Inspectors may follow up with a visit to the affected area and seek out clues at the residence or neighboring properties. A pool cover covered with still water could be the source of a mosquito outbreak affecting a neighborhood, for example.

“If the person is home and gives us permission, we will go on and treat,” Thompson said. “We’d love them to get the pool going and take care of it, but in the meantime we’ll come and treat it.”

The county’s mosquito division has been in service for 104 years and has adapted to evolving trends across the state. Thompson even argued it’s helped Monmouth County thrive.

“If we weren’t here, people would miss us, I think,” she said. “Some argue that mosquito control is what made the Jersey Shore habitable.”

This article was first published in the July 26-Aug. 2, 2018 print edition of The Two River Times.

If you liked this story, you’ll love our newspaper. Click here to subscribe

You may also like