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A Marsh of All Places

A Marsh of All Places

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A viral story claims cranberry growers release spiders into their marshes to control pests and that workers must be screened for arachnophobia before wading into the water. The story is a lie. But Wisconsin's cranberry marshes are definitely not spider-free. When growers flood a cranberry bed for harvest, spiders hidden among the vines rise with the water and travel across its surface toward the safety of the dikes. For a brief moment, several acres of spiders can become concentrated in one place. But they are not attacking workers, laying eggs on people or being deliberately released. The reality of Wisconsin's cranberry marshes is far more complicated and fascinating than the internet makes it sound. In this episode, we investigate how the viral story began, how cranberries are actually grown and what really happens to the spiders when a marsh is flooded. We also explore why wild cranberry wetlands can contain far more spiders than commercial marshes and whether those spiders actually help control agricultural pests. Cranberry grower John Stauner takes us inside the ecosystem of James Lake Farms. Dr. Michael Draney, professor and curator of the Richter Museum of Natural History at UW-Green Bay, explains the remarkable diversity of spiders living in Wisconsin wetlands. USDA cranberry entomologist Shawn Steffan reveals what decades of research tell us about the complicated role those predators play in a working marsh. Together, they help us separate viral fiction from the fascinating reality beneath Wisconsin's cranberry marshes. 🎧 Listen everywhere Follow Weird Wisconsin: Facebook Instagram TikTok Learn More: James Lake Farms 📍Three Lakes, Wisconsin Website Dr. Michael Draney UW-Green Bay Shawn Steffan UW Entomology Episode Artwork by Rachal Duggan Instagram Website Original Theme by Tyler Quinn Website
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