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Airplanes carrying the insecticides can't get sufficiently low to the ground in Miami Beach, experts say. But do residents really want them to? (Photo: Adam Mizrahi/flickr/cc)

In Zika-Gripped Florida, Concerns Mount Over Insecticide Use—and Efficacy

"It's essentially a neurotoxin and can result in unborn children in particular having neurodevelopmental problems," expert says of pesticide naled

Deirdre Fulton

Not only is the anti-Zika aerial insecticide spraying program raising health concerns in Florida and beyond, but the high-rise landscape in Miami Beach may be making such campaigns ineffective, to boot.

Weeks ago, as mosquitoes carrying the disease became resistant to a less-potent pesticide, Miami-Dade County turned to the more controversial naled, which the Miami Herald noted is "toxic not just to the noxious flying parasites, but also to beneficial insects like honey bees, as well as birds, some fish—and people."

The newspaper wrote:

Several studies suggest that long-term exposure to even low levels of naled can have serious health effects for children and infants as well as wildlife, including butterflies and bees, for whom exposure can be lethal. Some studies suggest it might have neurological and developmental effects on human fetuses, including on brain size, echoing the severe consequences that eradication of the Aedes aegypti mosquito that carries the Zika virus is meant to prevent.

"It's essentially a neurotoxin and can result in unborn children in particular having neurodevelopmental problems," Dr. Barry Ryan of Emory University told local station WTXL this week.

WTXL pointed out that the European Union has banned the insecticide.

Meanwhile, National Geographic reports on Friday that "the way those compounds are delivered doesn't fit the latest landscape where the insects are now flourishing—the high-rise hotels and luxury condos of Miami Beach."

Airplanes carrying the insecticides can't get sufficiently low to the ground, for one thing, and the tall buildings in Miami Beach create a sort of wind tunnel, as one expert told the magazine, complicating aerial spraying efforts.

"That makes it more likely that some bugs will be missed by spraying campaigns or get less than a full dose of killing pesticides, allowing them to become resistant," wrote journalist and author Maryn McKenna. "And that scenario could play out not just in Miami but also in the similar Gulf Coast cities where federal health authorities say the disease may land next."

But the solution to that particular problem—working to ensure mosquitoes on the ground get a "full dose" of the insecticide—may be detrimental in the long run.

As Nichelle Harriott, science and regulatory director at Beyond Pesticides, told the Herald in mid-August: "Widespread application of naled is very troubling. We know it's highly neurotoxic. Studies show that low-dose exposures are problematic over the life of a person."

"In cases such as this," she said, "they always say that people are just going to be exposed to small amounts for very short periods of time. But how long is it going to go on? How long are they going to be spraying? Those exposures do accumulate, and we need to look at those aggregate exposures."


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80+ US Prosecutors Vow Not to Be Part of Criminalizing Abortion Care

"Criminalizing and prosecuting individuals who seek or provide abortion care makes a mockery of justice," says a joint statement signed by 84 elected attorneys. "Prosecutors should not be part of that."

Kenny Stancil ·


Progressives Rebuke Dem Leadership as Clyburn Dismisses Death of Roe as 'Anticlimactic'

"The gap between the Democratic leadership, and younger progressives on the question of 'How Bad Is It?' is just enormous."

Julia Conley ·


In 10 Key US Senate Races, Here's How Top Candidates Responded to Roe Ruling

While Republicans unanimously welcomed the Supreme Court's rollback of half a century of reproductive rights, one Democrat said "it's just wrong that my granddaughter will have fewer freedoms than my grandmother did."

Brett Wilkins ·


Sanders Says End Filibuster to Combat 'Outrageous' Supreme Court Assault on Abortion Rights

"If Republicans can end the filibuster to install right-wing judges to overturn Roe v. Wade, Democrats can and must end the filibuster, codify Roe v. Wade, and make abortion legal and safe," said the Vermont senator.

Jake Johnson ·


Patients in Trigger-Ban States Immediately Denied Abortion Care in Post-Roe US

Some people scheduled to receive abortions were turned away within minutes of the right-wing Supreme Court's decision to strike down Roe v. Wade.

Kenny Stancil ·

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