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March 5, 2020

BU researchers discover waxworm that biodegrades plastic

A team of Brandon University (BU) researchers in Canada has found that waxworms, the caterpillar larvae of the greater wax moth, eats and biodegrades plastic.

A team of Brandon University (BU) researchers in Canada have found that waxworms, the caterpillar larvae of the greater wax moth, eats and biodegrades plastic.

The team has published their findings in biology journal Proceedings of the Royal Society B.

The study found that waxworms ate polyethylene, a common form of plastic used for making bags among other applications. In the lab, around 60 waxworms ate more than 30cm² of a plastic bag in less than a week.

The researchers found a species of intestinal bacteria in the worms that survived on plastic for more than a year. The researchers named these worms plastivores.

Additionally, the study inferred that putting the waxworms on a complete polyethylene diet increased the number of microbes in their guts, compared to other worms.

The plastic degradation creates an alcoholic byproduct called Glycol.

Researcher Dr Christophe LeMoine said: “Plastic-eating bacteria are known, but in isolation they degrade plastics at a very slow rate.

“Likewise, when we treated the caterpillars with antibiotics to reduce their gut bacteria, they were not able to degrade the plastic as easily. So it seems that there is a synergy between the bacteria and their waxworm hosts that accelerates plastic degradation.”

The researchers are presently engaged in further studies to learn about the traits of the bacteria and the nature of the end products.

BU dean of science Dr Bernadette Ardelli said: “This is very intriguing research that is showing promising results as we tackle a worldwide problem.

“It’s very rewarding to see our faculty taking on important issues like this as well as to see our students gaining valuable experience, while also making their own contributions to an exciting discovery.”

According to the university, the research may help in the development of better plastic biodegradation systems.

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