Anchor ads are not supported on this page.

4S Ranch Allied Gardens Alpine Baja Balboa Park Bankers Hill Barrio Logan Bay Ho Bay Park Black Mountain Ranch Blossom Valley Bonita Bonsall Borrego Springs Boulevard Campo Cardiff-by-the-Sea Carlsbad Carmel Mountain Carmel Valley Chollas View Chula Vista City College City Heights Clairemont College Area Coronado CSU San Marcos Cuyamaca College Del Cerro Del Mar Descanso Downtown San Diego Eastlake East Village El Cajon Emerald Hills Encanto Encinitas Escondido Fallbrook Fletcher Hills Golden Hill Grant Hill Grantville Grossmont College Guatay Harbor Island Hillcrest Imperial Beach Imperial Valley Jacumba Jamacha-Lomita Jamul Julian Kearny Mesa Kensington La Jolla Lakeside La Mesa Lemon Grove Leucadia Liberty Station Lincoln Acres Lincoln Park Linda Vista Little Italy Logan Heights Mesa College Midway District MiraCosta College Miramar Miramar College Mira Mesa Mission Beach Mission Hills Mission Valley Mountain View Mount Hope Mount Laguna National City Nestor Normal Heights North Park Oak Park Ocean Beach Oceanside Old Town Otay Mesa Pacific Beach Pala Palomar College Palomar Mountain Paradise Hills Pauma Valley Pine Valley Point Loma Point Loma Nazarene Potrero Poway Rainbow Ramona Rancho Bernardo Rancho Penasquitos Rancho San Diego Rancho Santa Fe Rolando San Carlos San Marcos San Onofre Santa Ysabel Santee San Ysidro Scripps Ranch SDSU Serra Mesa Shelltown Shelter Island Sherman Heights Skyline Solana Beach Sorrento Valley Southcrest South Park Southwestern College Spring Valley Stockton Talmadge Temecula Tierrasanta Tijuana UCSD University City University Heights USD Valencia Park Valley Center Vista Warner Springs

Mosquito Coast

County specialists attack larvae in I.B.

“Each one of those deep little holes around those railroad ties can breed thousands of mosquitos.”
“Each one of those deep little holes around those railroad ties can breed thousands of mosquitos.”

“You just got one [mosquito] that landed on your chest,” Sean Simmons said, “and there’s some flying around you.”

“Ohhh man there’s another mosquito on my shoulder,” I said as I swatted it away.

Simmons and Conlan. “We are not going to go out and spray the adult mosquitos.”

On August 3 at 10 am, I was bitten by over a dozen mosquitos at the Tijuana Estuary in Imperial Beach.

“Mosquitos are attracted to the carbon dioxide that you emit when you exhale,” Chris Conlan said. “That brings them into the area but once they are in the area, it's more secondary cues that take over and scientists don’t have all of that figured out yet. Some people emit certain odors that are a bit more attractive to mosquitos.”

“The Tijuana Estuary is made up of freshwater from the Tijuana River that connects with the saltwater of the Pacific Ocean."

Conlan, a supervising vector ecologist for the County of San Diego, and Simmons, a vector control lead technician; met with me close to the source of the recent swarms of mosquitos in IB. We rendezvoused in front of the estuary office by Caspian Way and 3rd Street a couple block south of Imperial Beach Boulevard.

Simmons: “For the past couple of years, the residents have been saying this is the worst it’s ever been.”

According to the estuary’s website: “The Tijuana Estuary is made up of freshwater from the Tijuana River that connects with the saltwater of the Pacific Ocean creating a large wetland habitat dominated by low lying vegetation known as a salt marsh.”

Sponsored
Sponsored

"We are getting eaten alive on 2nd and Daisy Avenue."

“You see those little brown things sticking up,” Simmons said as he pointed south of the estuary, “those are railroad ties.”

“Each one of those deep little holes around those railroad ties can breed thousands of mosquitos,” Conlan said, “in just that space around the railroad ties.”

"It was so bad out that I inhaled mosquitos when I rode my mountain bike.”

“I think they were going to build a railroad here a long time ago and they never got around to it,” Simmons said. “That’s about a quarter mile's worth.”

The two further explained that some of the railroad ties are immersed in water and by weeds, which are ideal locations for mosquitos to leave their larvae.

“I got bitten six times within seconds on 13th and Iris Avenue.”

“Mosquitos like calm places to lay their eggs,” Conlan said, “they can tuck themselves in there and plus sometimes they’ll lay their eggs at the base of those weeds.”

“I wish I could show you,” Simmons said, “you look down in the water and you’ll see larvae everywhere.”

“I’m good for now,” I said, as I killed a mosquito that bit me on my neck.

On Seacoast Boulevard, which was about 200 yards to the west of us, there are catch basins and storm drains “where mosquitos breed as well.”

In the last month, many IB residents posted about their mass mosquito attacks on their social media.

“Crap, we are getting eaten alive on 2nd and Daisy Avenue,” said one; another neighbor confirmed: “same [here] on 2nd and Evergreen Avenue.”

Another resident was attacked about two miles east from the estuary. “I got bitten six times within seconds on 13th and Iris Avenue,” she posted.

Simmons posts up mosquito traps that are about three-four-foot long and cylindrical in shape — throughout IB.

“They are full of dry ice pellets and the cooler has a couple of holes drilled in it so when the ice gasses off, that’s what attracts the mosquitos,” Conlan said, “and directly below that cooler is a fan mechanism, and when the mosquitos come in to investigate, they get sucked into that fan mechanism and pushed down into a holding sock.”

When Simmons and his team capture the mosquitos, they bring them to Conlan and his team to analyze.

“These specific ones are called the Black Salt Marsh Mosquito, Conlan said. “They can go several miles; sometimes six-seven miles from where they are produced.”

“They are really annoying because they bite from sun up to sundown,” Simmons said.

“…. but the good news is they don’t transmit diseases,” emphasized Conlan, “including the West Nile Virus.”

The two attribute increase of the mosquitos to the heat and the recent king tides.

“Our guys do the best they can,” Conlan said. “You can see from the expanse that you are looking at, there is a lot of area and keep in mind is that it’s not a static habitat; things change over time. If you get an excessive high tide, it alters something a little bit and now all of a sudden there’s a new spot that shows up that’s breeding that wasn’t breeding before.”

“So what we’ll do is look at the habitat and see if there’s some mounds, berms or something like that, that can collect water,” Simmons said. “We’ll concentrate on those ….. and those railroad ties where they are down in the ground, it’s really deep right there 10-20 feet on each side; there’s water, especially on this side there’s a lot more water.

“Over here where that bridge is, there's an area there that holds water. Then there’s another area over there by that playground.”

The two said that the next high tide will come on August 10, the ideal time to treat the breeding areas.

“They (Simmons and his team) use a product that’s in a pelletized form,” Conlan said. “Those pellets have residual activity they put the stuff out there, it will slowly infiltrate into the water, and it continues to do that in a course of a few weeks.”

I then asked the two when will they spray the area next.

“We are not going to go out and spray the adult mosquitos,” Simmons said. “The more efficient way to deal with mosquitos is to kill them while they are in the larvae stage, because they are concentrated in the water ….. you can see them in the water, you can literally see thousands. We [strategically] place a (biological product) granule and it really starts to work in 24 hours and some even sooner.”

I met Mark later that morning by his house at Iris Avenue and 5th Street; he’s lived in the area for 60 years.

“Mosquitos have always been here,” he said, “back in the early 1980s they had a plane spray the whole place.”

“About two-three years ago it was so bad out that I inhaled mosquitos when I rode my mountain bike,” he said. “Earlier I saw people out there in the estuary, I think spraying or something. That’s kept it down a bit.”

Simmons talks to the hikers in the estuary and neighbors to assess the mosquito problems; he said in the last couple of days, his team received over 50 calls from IB residents. “For the past couple of years, the residents have been saying this is the worst it’s ever been,” he said.

“[And] we’ve been beefing up our staff steadily for the last few years,” Conlan said. “We brought in 15 temporary staff during the course of the summer so they can help out so we can stay on top of this stuff.”

On the county website, it lists various remedies to protect yourself from mosquito bites. “Apply insect repellent that contains DEET, Picaridin, IR3535 or Oil of Lemon Eucalyptus when you are outdoors. Whenever you use an insecticide or insect repellent, be sure to read and follow the directions carefully. Avoid applying repellent to children less than two years old. Use care in applying repellent on children; repellent on their hands may get into their mouth and eyes, causing irritation.”

The latest copy of the Reader

Please enjoy this clickable Reader flipbook. Linked text and ads are flash-highlighted in blue for your convenience. To enhance your viewing, please open full screen mode by clicking the icon on the far right of the black flipbook toolbar.

Here's something you might be interested in.
Submit a free classified
or view all
Previous article

Undocumented workers break for Trump in 2024

Illegals Vote for Felon
“Each one of those deep little holes around those railroad ties can breed thousands of mosquitos.”
“Each one of those deep little holes around those railroad ties can breed thousands of mosquitos.”

“You just got one [mosquito] that landed on your chest,” Sean Simmons said, “and there’s some flying around you.”

“Ohhh man there’s another mosquito on my shoulder,” I said as I swatted it away.

Simmons and Conlan. “We are not going to go out and spray the adult mosquitos.”

On August 3 at 10 am, I was bitten by over a dozen mosquitos at the Tijuana Estuary in Imperial Beach.

“Mosquitos are attracted to the carbon dioxide that you emit when you exhale,” Chris Conlan said. “That brings them into the area but once they are in the area, it's more secondary cues that take over and scientists don’t have all of that figured out yet. Some people emit certain odors that are a bit more attractive to mosquitos.”

“The Tijuana Estuary is made up of freshwater from the Tijuana River that connects with the saltwater of the Pacific Ocean."

Conlan, a supervising vector ecologist for the County of San Diego, and Simmons, a vector control lead technician; met with me close to the source of the recent swarms of mosquitos in IB. We rendezvoused in front of the estuary office by Caspian Way and 3rd Street a couple block south of Imperial Beach Boulevard.

Simmons: “For the past couple of years, the residents have been saying this is the worst it’s ever been.”

According to the estuary’s website: “The Tijuana Estuary is made up of freshwater from the Tijuana River that connects with the saltwater of the Pacific Ocean creating a large wetland habitat dominated by low lying vegetation known as a salt marsh.”

Sponsored
Sponsored

"We are getting eaten alive on 2nd and Daisy Avenue."

“You see those little brown things sticking up,” Simmons said as he pointed south of the estuary, “those are railroad ties.”

“Each one of those deep little holes around those railroad ties can breed thousands of mosquitos,” Conlan said, “in just that space around the railroad ties.”

"It was so bad out that I inhaled mosquitos when I rode my mountain bike.”

“I think they were going to build a railroad here a long time ago and they never got around to it,” Simmons said. “That’s about a quarter mile's worth.”

The two further explained that some of the railroad ties are immersed in water and by weeds, which are ideal locations for mosquitos to leave their larvae.

“I got bitten six times within seconds on 13th and Iris Avenue.”

“Mosquitos like calm places to lay their eggs,” Conlan said, “they can tuck themselves in there and plus sometimes they’ll lay their eggs at the base of those weeds.”

“I wish I could show you,” Simmons said, “you look down in the water and you’ll see larvae everywhere.”

“I’m good for now,” I said, as I killed a mosquito that bit me on my neck.

On Seacoast Boulevard, which was about 200 yards to the west of us, there are catch basins and storm drains “where mosquitos breed as well.”

In the last month, many IB residents posted about their mass mosquito attacks on their social media.

“Crap, we are getting eaten alive on 2nd and Daisy Avenue,” said one; another neighbor confirmed: “same [here] on 2nd and Evergreen Avenue.”

Another resident was attacked about two miles east from the estuary. “I got bitten six times within seconds on 13th and Iris Avenue,” she posted.

Simmons posts up mosquito traps that are about three-four-foot long and cylindrical in shape — throughout IB.

“They are full of dry ice pellets and the cooler has a couple of holes drilled in it so when the ice gasses off, that’s what attracts the mosquitos,” Conlan said, “and directly below that cooler is a fan mechanism, and when the mosquitos come in to investigate, they get sucked into that fan mechanism and pushed down into a holding sock.”

When Simmons and his team capture the mosquitos, they bring them to Conlan and his team to analyze.

“These specific ones are called the Black Salt Marsh Mosquito, Conlan said. “They can go several miles; sometimes six-seven miles from where they are produced.”

“They are really annoying because they bite from sun up to sundown,” Simmons said.

“…. but the good news is they don’t transmit diseases,” emphasized Conlan, “including the West Nile Virus.”

The two attribute increase of the mosquitos to the heat and the recent king tides.

“Our guys do the best they can,” Conlan said. “You can see from the expanse that you are looking at, there is a lot of area and keep in mind is that it’s not a static habitat; things change over time. If you get an excessive high tide, it alters something a little bit and now all of a sudden there’s a new spot that shows up that’s breeding that wasn’t breeding before.”

“So what we’ll do is look at the habitat and see if there’s some mounds, berms or something like that, that can collect water,” Simmons said. “We’ll concentrate on those ….. and those railroad ties where they are down in the ground, it’s really deep right there 10-20 feet on each side; there’s water, especially on this side there’s a lot more water.

“Over here where that bridge is, there's an area there that holds water. Then there’s another area over there by that playground.”

The two said that the next high tide will come on August 10, the ideal time to treat the breeding areas.

“They (Simmons and his team) use a product that’s in a pelletized form,” Conlan said. “Those pellets have residual activity they put the stuff out there, it will slowly infiltrate into the water, and it continues to do that in a course of a few weeks.”

I then asked the two when will they spray the area next.

“We are not going to go out and spray the adult mosquitos,” Simmons said. “The more efficient way to deal with mosquitos is to kill them while they are in the larvae stage, because they are concentrated in the water ….. you can see them in the water, you can literally see thousands. We [strategically] place a (biological product) granule and it really starts to work in 24 hours and some even sooner.”

I met Mark later that morning by his house at Iris Avenue and 5th Street; he’s lived in the area for 60 years.

“Mosquitos have always been here,” he said, “back in the early 1980s they had a plane spray the whole place.”

“About two-three years ago it was so bad out that I inhaled mosquitos when I rode my mountain bike,” he said. “Earlier I saw people out there in the estuary, I think spraying or something. That’s kept it down a bit.”

Simmons talks to the hikers in the estuary and neighbors to assess the mosquito problems; he said in the last couple of days, his team received over 50 calls from IB residents. “For the past couple of years, the residents have been saying this is the worst it’s ever been,” he said.

“[And] we’ve been beefing up our staff steadily for the last few years,” Conlan said. “We brought in 15 temporary staff during the course of the summer so they can help out so we can stay on top of this stuff.”

On the county website, it lists various remedies to protect yourself from mosquito bites. “Apply insect repellent that contains DEET, Picaridin, IR3535 or Oil of Lemon Eucalyptus when you are outdoors. Whenever you use an insecticide or insect repellent, be sure to read and follow the directions carefully. Avoid applying repellent to children less than two years old. Use care in applying repellent on children; repellent on their hands may get into their mouth and eyes, causing irritation.”

Comments
Sponsored

The latest copy of the Reader

Please enjoy this clickable Reader flipbook. Linked text and ads are flash-highlighted in blue for your convenience. To enhance your viewing, please open full screen mode by clicking the icon on the far right of the black flipbook toolbar.

Here's something you might be interested in.
Submit a free classified
or view all
Previous article

In-n-Out alters iconic symbol to reflect “modern-day California”

Keep Palm and Carry On?
Next Article

Poway’s schools, faced with money squeeze, fined for voter mailing

$105 million bond required payback of nearly 10 times that amount
Comments
Ask a Hipster — Advice you didn't know you needed Big Screen — Movie commentary Blurt — Music's inside track Booze News — San Diego spirits Classical Music — Immortal beauty Classifieds — Free and easy Cover Stories — Front-page features Drinks All Around — Bartenders' drink recipes Excerpts — Literary and spiritual excerpts Feast! — Food & drink reviews Feature Stories — Local news & stories Fishing Report — What’s getting hooked from ship and shore From the Archives — Spotlight on the past Golden Dreams — Talk of the town The Gonzo Report — Making the musical scene, or at least reporting from it Letters — Our inbox Movies@Home — Local movie buffs share favorites Movie Reviews — Our critics' picks and pans Musician Interviews — Up close with local artists Neighborhood News from Stringers — Hyperlocal news News Ticker — News & politics Obermeyer — San Diego politics illustrated Outdoors — Weekly changes in flora and fauna Overheard in San Diego — Eavesdropping illustrated Poetry — The old and the new Reader Travel — Travel section built by travelers Reading — The hunt for intellectuals Roam-O-Rama — SoCal's best hiking/biking trails San Diego Beer — Inside San Diego suds SD on the QT — Almost factual news Sheep and Goats — Places of worship Special Issues — The best of Street Style — San Diego streets have style Surf Diego — Real stories from those braving the waves Theater — On stage in San Diego this week Tin Fork — Silver spoon alternative Under the Radar — Matt Potter's undercover work Unforgettable — Long-ago San Diego Unreal Estate — San Diego's priciest pads Your Week — Daily event picks
4S Ranch Allied Gardens Alpine Baja Balboa Park Bankers Hill Barrio Logan Bay Ho Bay Park Black Mountain Ranch Blossom Valley Bonita Bonsall Borrego Springs Boulevard Campo Cardiff-by-the-Sea Carlsbad Carmel Mountain Carmel Valley Chollas View Chula Vista City College City Heights Clairemont College Area Coronado CSU San Marcos Cuyamaca College Del Cerro Del Mar Descanso Downtown San Diego Eastlake East Village El Cajon Emerald Hills Encanto Encinitas Escondido Fallbrook Fletcher Hills Golden Hill Grant Hill Grantville Grossmont College Guatay Harbor Island Hillcrest Imperial Beach Imperial Valley Jacumba Jamacha-Lomita Jamul Julian Kearny Mesa Kensington La Jolla Lakeside La Mesa Lemon Grove Leucadia Liberty Station Lincoln Acres Lincoln Park Linda Vista Little Italy Logan Heights Mesa College Midway District MiraCosta College Miramar Miramar College Mira Mesa Mission Beach Mission Hills Mission Valley Mountain View Mount Hope Mount Laguna National City Nestor Normal Heights North Park Oak Park Ocean Beach Oceanside Old Town Otay Mesa Pacific Beach Pala Palomar College Palomar Mountain Paradise Hills Pauma Valley Pine Valley Point Loma Point Loma Nazarene Potrero Poway Rainbow Ramona Rancho Bernardo Rancho Penasquitos Rancho San Diego Rancho Santa Fe Rolando San Carlos San Marcos San Onofre Santa Ysabel Santee San Ysidro Scripps Ranch SDSU Serra Mesa Shelltown Shelter Island Sherman Heights Skyline Solana Beach Sorrento Valley Southcrest South Park Southwestern College Spring Valley Stockton Talmadge Temecula Tierrasanta Tijuana UCSD University City University Heights USD Valencia Park Valley Center Vista Warner Springs
Close

Anchor ads are not supported on this page.

This Week’s Reader This Week’s Reader