'Iron' fist proposed for Miami's giant snail problem

Oct 12, 2011 by Kerry Sheridan
Giant African land snails are shown to the media in Miami, Florida, in September 2011. Huge, slimy snails from Africa have overrun a Miami-area town and the US government said Tuesday a potent pesticide is the best way to get rid of their exploding numbers.

Huge, slimy snails from Africa have overrun a Miami-area town and the US government said Tuesday a potent pesticide is the best way to get rid of their exploding numbers.

Thousands of the four-to-eight inch (10-20 centimeter) giant African snails have been collected in Coral Gables, a town in Miami-Dade County, since the infestation was first discovered in September, said the US .

Officials are not sure how or when the exotic snails got to south Florida, but they are hoping to act fast, using the molluscicide to stop to dual-sex creatures from multiplying even faster.

Not only are the giant snails scaring residents, leaving slimy trails and chomping up local cucumber, banana and pumpkin plants, but they also pose a health risk because they carry a dangerous parasite known as the rat lungworm.

If people consume the parasite via contaminated produce or contact with a snail -- and several cases of this have been documented worldwide -- it can enter the and cause nausea, headache and .

The snails give off a when they die, and they have been blamed for destroying the whitewashed siding of houses and even causing .

An environmental assessment was issued by the USDA describing the options of doing nothing to kill off the invasive creatures versus applying the pesticide. Public comments are being accepted before a final decision is made.

The proposed remedy is called Sluggo®-AG, which uses wheat gluten to attract slugs and snails and contains 1.0% iron phosphate to poison them.

"After eating the bait, snails stop feeding immediately because the iron phosphate interferes with calcium metabolism in their gut. Snails die three to six days later," said the USDA assessment.

"Hand picking of snails will also be conducted as part of the eradication program. Regular and extensive hand picking is effective in reducing snail numbers when done in combination with other control methods," it added.

The big brown creatures have been found mainly in residential neighborhoods, though the affected area also includes parts of two national parks -- Everglades National Park and the Biscayne National Park.

"Iron phosphate is considered practically non-toxic to humans," the report said, adding that cumulative risks to the environment and other animals are low and the compound is not water soluble so is not likely to pollute groundwater.

The poison pellets would be applied with a spreader, like the kind used to spread grass seed or fertilizer, within a 200 yard (meter) radius of any giant snail sighting.

The entire treatment program, if approved, could go on for two to four years.

The last time giant African snails surfaced in south Florida was in 1966, when a boy smuggled three of them from Hawaii and his grandmother set the snails free in her garden.

They quickly started breeding, and it took almost a decade and a million dollars to get rid of them all.

"Seven years later, more than 18,000 had been found. The eradication program took nearly 10 years at a cost of $1 million. Eradication was declared in 1975," the USDA said.

Explore further: Policy action urgently needed to protect Hawaii's dolphins

add to favorites email to friend print save as pdf

Related Stories

Giant snails a danger in Florida

Aug 10, 2005

Florida officials reportedly are fearful giant South American channeled apple snails might threaten native species and endanger water quality.

Marine snails get a metabolism boost

May 03, 2011

Most of us wouldn't consider slow-moving snails to be high-metabolism creatures. But at one point in the distant past, snail metabolism sped up, says a new study of marine snails in the journal Paleobiology.

Newest marsh villain: the periwinkle snail

Dec 19, 2005

Oil companies, levees and the burrowing nutria have been blamed for destroying Louisiana's marshes -- and now a new culprit arrives: the periwinkle snail.

Tiny snails survive in bird's digestive system

Jul 12, 2011

(PhysOrg.com) -- In a recent study published in the Journal of Biogeography, researchers from the Tohoku University in Japan show how 15 percent of the Tornatellides boeningi, or tiny land snail, are able to s ...

Recommended for you

Stranded pilot whale rescued in Cape Verde

17 minutes ago

The archipelago nation of Cape Verde is widely recognised as a marine biodiversity hotspot, not least because of the abundance of marine mammals found in its waters.

Protections blocked, but sage grouse work goes on

19 hours ago

(AP)—U.S. wildlife officials will decide next year whether a wide-ranging Western bird species needs protections even though Congress has blocked such protections from taking effect, Interior Secretary ...

User comments : 6

Adjust slider to filter visible comments by rank

Display comments: newest first

tkjtkj
not rated yet Oct 12, 2011
And just what might be 'Plan B' ?? ie, implimented when the creatures 'learn' to stay away from the toxic agent??
Also: the two 'infestations' treated with the toxin both ended around 1975 .. begging the question "why is one of them referred to as the 1st" ??
El_Nose
4 / 5 (1) Oct 12, 2011
offer a $0.05 bounty per snail and the homeless will do the job for you.

by the way -- when did the cent key on the keyboard dissappear?
FMA
1 / 5 (1) Oct 12, 2011
Or invite French tourist to visit Florida, they will love them :p
Ritorix
not rated yet Oct 12, 2011
Blamed for traffic accidents? Believe me, it doesn't take much to cause an accident in Miami.
RealScience
not rated yet Oct 12, 2011
Rename them 'Giant Escargot', and serve with garlic butter.
Ojorf
1 / 5 (1) Oct 13, 2011
"the giant snails scaring residents" ;-)

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.