A tricky trap for redback spiders

Invasive redback spiders are highly venomous, threatening both people and New Zealand’s native species. A team of scientists is developing a cunning tool to trap male redbacks, by concocting an irresistible spiderweb perfume. We visit 800 captive redback spiders in the lab, learn about their wild mating habits, and check out the “spider arena” where the redbacks’ signature scent is put to the test. Guests:Dr Andrew Twidle, Plant & Food ResearchTom Sullivan, Plant & Food ResearchLearn more:Read the article that accompanies this episode.Redbacks aren’t the only spiders to engage in a spot of sexual cannibalism. Claire Concannon enters the weird world of spider reproduction on a spider hunt in this episode.Back in 2016, Alison Ballance reported on the threat to Cromwell chafer beetles posed by red4KU24B9_Female_Redback_Spider_PFR3471_jpgback spiders.Coming up with clever ways to lure pests is also a big focus of Predator Free 2050, as Katy Gosset finds out in this 2021 episode.Sign up to the Our Changing World monthly newsletter for episode backstories, science analysis and more.Go to this episode on rnz.co.nz for more details