Termites' powerful weapon against extermination? Their own poop

By Barbara Liston

ORLANDO | Wed Sep 25, 2013 4:46pm EDT

ORLANDO (Reuters) - Scientists trying to understand why destructive wood-eating termites are so resistant to efforts to exterminate them have come up with an unusually repugnant explanation.

Termites' practice of building nests out of their own feces creates a scatological force field that Florida scientists now believe is the reason biological controls have failed to stop their pestilential march all over the world.

A nine-year study concluded that termite feces act as a natural antibiotic, growing good bacteria in the subterranean nests that attack otherwise deadly pathogens, according to the findings published this month in the Proceedings of the Royal Society B.

"When they make a poop, it's not like they can throw it away and say forget about this. And over the millions of years of evolution it somehow evolved to take advantage of the poop there," said Nan-Yao Su, a University of Florida entomology professor and lead scientist and co-author of the study, along with Thomas Chouvenc, a University of Florida research associate.

Su also is the inventor of the popular Sentricon termite baiting and control system, which in 1995 became the first major alternative to liquid chemical treatments.

The findings could put an end to 50 years of failed research attempts to find a species of fungi that could kill termites when introduced into nests. Research repeatedly showed that fungi killed termites in a petri dish but not in the wild, Su said.

"Nobody was able to make it work in the field, but nobody would admit it," he said.

Su's goal was to find out why biological control never worked. His research colleagues determined that Streptomyces bacteria that are found in the nests and feed on fecal matter may be producing beneficial antimicrobial compounds that protect the termites from other potentially toxic matter.

Termites, mostly the voracious Formosans, cause $40 billion worth of damage a year worldwide, eating through wood structures particularly in Japan, China and the United States, Su said.

By the time a house is infested, the underground termite nest typically is 300 feet in diameter, hosting several million termites with a biomass weight of approximately 30 pounds, the weight of a medium-sized dog.

In one example, termites took nine months to bring down a new house in Hawaii built in the 1970s inadvertently on top of an untreated termite colony, Su said.

Further research will attempt to discover a way to bypass the protective compounds to destroy the termites, and to determine whether the findings can lead to new antibiotics for humans to replace those which have become ineffective.

(Editing by David Adams and Leslie Adler)

View the original article here

Termites' powerful weapon against extermination? Their own poop

By Barbara Liston

ORLANDO | Wed Sep 25, 2013 4:46pm EDT

ORLANDO (Reuters) - Scientists trying to understand why destructive wood-eating termites are so resistant to efforts to exterminate them have come up with an unusually repugnant explanation.

Termites' practice of building nests out of their own feces creates a scatological force field that Florida scientists now believe is the reason biological controls have failed to stop their pestilential march all over the world.

A nine-year study concluded that termite feces act as a natural antibiotic, growing good bacteria in the subterranean nests that attack otherwise deadly pathogens, according to the findings published this month in the Proceedings of the Royal Society B.

"When they make a poop, it's not like they can throw it away and say forget about this. And over the millions of years of evolution it somehow evolved to take advantage of the poop there," said Nan-Yao Su, a University of Florida entomology professor and lead scientist and co-author of the study, along with Thomas Chouvenc, a University of Florida research associate.

Su also is the inventor of the popular Sentricon termite baiting and control system, which in 1995 became the first major alternative to liquid chemical treatments.

The findings could put an end to 50 years of failed research attempts to find a species of fungi that could kill termites when introduced into nests. Research repeatedly showed that fungi killed termites in a petri dish but not in the wild, Su said.

"Nobody was able to make it work in the field, but nobody would admit it," he said.

Su's goal was to find out why biological control never worked. His research colleagues determined that Streptomyces bacteria that are found in the nests and feed on fecal matter may be producing beneficial antimicrobial compounds that protect the termites from other potentially toxic matter.

Termites, mostly the voracious Formosans, cause $40 billion worth of damage a year worldwide, eating through wood structures particularly in Japan, China and the United States, Su said.

By the time a house is infested, the underground termite nest typically is 300 feet in diameter, hosting several million termites with a biomass weight of approximately 30 pounds, the weight of a medium-sized dog.

In one example, termites took nine months to bring down a new house in Hawaii built in the 1970s inadvertently on top of an untreated termite colony, Su said.

Further research will attempt to discover a way to bypass the protective compounds to destroy the termites, and to determine whether the findings can lead to new antibiotics for humans to replace those which have become ineffective.

(Editing by David Adams and Leslie Adler)

View the original article here

Termites' powerful weapon against extermination? Their own poop

By Barbara Liston

ORLANDO | Wed Sep 25, 2013 4:46pm EDT

ORLANDO (Reuters) - Scientists trying to understand why destructive wood-eating termites are so resistant to efforts to exterminate them have come up with an unusually repugnant explanation.

Termites' practice of building nests out of their own feces creates a scatological force field that Florida scientists now believe is the reason biological controls have failed to stop their pestilential march all over the world.

A nine-year study concluded that termite feces act as a natural antibiotic, growing good bacteria in the subterranean nests that attack otherwise deadly pathogens, according to the findings published this month in the Proceedings of the Royal Society B.

"When they make a poop, it's not like they can throw it away and say forget about this. And over the millions of years of evolution it somehow evolved to take advantage of the poop there," said Nan-Yao Su, a University of Florida entomology professor and lead scientist and co-author of the study, along with Thomas Chouvenc, a University of Florida research associate.

Su also is the inventor of the popular Sentricon termite baiting and control system, which in 1995 became the first major alternative to liquid chemical treatments.

The findings could put an end to 50 years of failed research attempts to find a species of fungi that could kill termites when introduced into nests. Research repeatedly showed that fungi killed termites in a petri dish but not in the wild, Su said.

"Nobody was able to make it work in the field, but nobody would admit it," he said.

Su's goal was to find out why biological control never worked. His research colleagues determined that Streptomyces bacteria that are found in the nests and feed on fecal matter may be producing beneficial antimicrobial compounds that protect the termites from other potentially toxic matter.

Termites, mostly the voracious Formosans, cause $40 billion worth of damage a year worldwide, eating through wood structures particularly in Japan, China and the United States, Su said.

By the time a house is infested, the underground termite nest typically is 300 feet in diameter, hosting several million termites with a biomass weight of approximately 30 pounds, the weight of a medium-sized dog.

In one example, termites took nine months to bring down a new house in Hawaii built in the 1970s inadvertently on top of an untreated termite colony, Su said.

Further research will attempt to discover a way to bypass the protective compounds to destroy the termites, and to determine whether the findings can lead to new antibiotics for humans to replace those which have become ineffective.

(Editing by David Adams and Leslie Adler)

View the original article here

U.S. Navy to field first laser weapon, could shoot down a drone

The amphibious transport dock ship USS Ponce is seen underway in the U.S. 5th fleet area of responsibility in the Red Sea in this February 16, 2011 handout photo provided by the U.S. Navy.

Credit: Reuters/U.S. Navy/Mass Communication Specialist 3rd Class Scott Pittman/Handout

WASHINGTON | Mon Apr 8, 2013 7:49pm EDT

WASHINGTON (Reuters) - The U.S. Navy said on Monday it will deploy for the first time a laser weapon on one of its ships that could be capable of shooting down drones and disabling vessels.

"The future is here," said Peter Morrison at the Office of Naval Research's Solid-State Laser Technology Maturation Program.

The weapon is being billed as a step toward transforming warfare. Since it runs on electricity, it can fire as long as there is power at a cost of less than $1 dollar per shot.

"Compare that to the hundreds of thousands of dollars it costs to fire a missile, and you can begin to see the merits of this capability," Chief of Naval Research Rear Admiral Matthew Klunder, said in a statement.

The prototype, which one official said cost between $31 million and $32 million to make, will be installed aboard the USS Ponce, which is being used as a floating base in the Middle East, sometime in fiscal year 2014, which begins in October.

A Navy video showing the laser shooting down a drone can be seen at youtu.be/OmoldX1wKYQ

Klunder said the Navy expects that someday incoming missiles will not be able to "simply outmaneuver" a highly accurate laser beam traveling at the speed of light.

A new report from the Congressional Research Service praises the laser technology but also notes drawbacks, including the potential it could accidentally hit satellites or aircraft. Weather also affects lasers.

"Lasers might not work well, or at all, in rain or fog, preventing lasers from being an all-weather solution," it said in its report issued on March 14.

(Reporting by Phil Stewart; editing by Xavier Briand)

View the original article here