
- 06 Apr, 20
- by GGRC
- in Uncategorized, Youth Awareness
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How a Plastic-Eating Caterpillar Could Help Solve the World’s Waste Crisis
The research, published in Proceedings of the Royal Society B last Wednesday , looks at exactly how the caterpillars are able to effectively digest plastic, in hopes of learning from the process to develop a solution to the plastic pollution crisis. The answer? A symbiotic relationship between the caterpillars and bacteria living in their gut.
“We found that waxworm caterpillars are endowed with gut microbes that are essential in the plastic biodegradation process,” study coauthor and Brandon University biology chair Christophe LeMoine told CNN . “This process seems reliant on a synergy between the caterpillars and their gut bacteria to accelerate polyethylene degradation.”
The researchers found a species of the waxworms’ gut bacteria that was able to survive on the plastic alone for a full year, but the bacteria and the caterpillars were most successful when working together. The bacteria alone took longer to break down the plastic, and the caterpillars also digested the plastic more slowly when given antibiotics, the university press release explained. On the other hand, when the caterpillars were fed only plastic, the bacteria in their gut increased.
The researchers found that the caterpillars themselves could survive eating plastic bags for one week, and that 60 of them could eat through about 30 square centimeters (approximately 4.65 square inches) of the stuff during that time, Phys.org reported. The byproduct of all this? An alcohol known as glycol.

“Worms that eat our plastic waste and turn it into alcohol sounds too good to be true. And in a way it is,” Dr. Cassone said in the press release. “The problem of plastic pollution is too large to simply throw worms at. But if we can better understand how the bacteria works together with the worm and what kind of conditions cause it to flourish, perhaps this information can be used to design better tools to eliminate plastics and microplastics from our environment.”
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