Beijing's caterpillar problem

北京满街毛毛虫?官方放数亿天敌!

Round Table China

2026-09-29

23 分钟
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单集简介 ...

Beijing is crawling with a problem you cannot ignore. American white moth caterpillars are raining down from trees, blanketing sidewalks, and turning a simple walk into something close to a nightmare. The city's answer sounds like science fiction. Release hundreds of millions of parasitic wasps and let them do the work. Why has this year's infestation exploded and can this tiny-winged counterattack can actually work? On the show: Steve, Fei Fei & Yushan
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单集文稿 ...

  • Discussion keeps the world turning.

  • This is Round Table.

  • Coming up: Beijing has a big bug problem.

  • And no, we're not talking about the little ones that you might not notice at all.

  • These American white moth caterpillars are dropping from branches, coating sidewalks, and making everyday walks a little nightmarish.

  • But here's the twist: the city's plan to fight back involves releasing hundreds of millions of parasitic wasps.

  • Sounds like a science-fiction film, does it not?

  • Today, we're asking why the infestation this year exploded and whether this tiny, winged counter-attack can actually work.

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  • If you've been walking around Beijing recently, then I'm sure you must have noticed an unwelcome sight:

  • caterpillars hanging from trees, crawling on the ground,

  • falling from the sky like it's raining, seemingly everywhere you look.

  • Well, those are the larvae of the American white moth, an invasive species that has become particularly active this year.

  • While experts say they pose no direct health threat, they can cause serious damage to trees.

  • And in response, Beijing is rolling out a range of measures,

  • including releasing hundreds of millions of tiny parasitic wasps to fight the pest naturally.

  • So why has the infestation become so severe this year?