Mosquito dunks are selling out across Canada as a viral TikTok trend and a severe mosquito season increase demand for BTI tablets [1, 2].

The shortage reflects an intersection of social media influence and public health needs. As homeowners seek relief from an unusually aggressive bug season, the rapid spread of DIY pest control methods is depleting retail inventories [1].

The trend centers on a method known as the "bucket of doom." This approach involves placing BTI tablets into a five-gallon bucket of water [3]. The goal is to create a concentrated trap that attracts and kills mosquito larvae, preventing them from reaching adulthood and biting residents [1, 2].

BTI, or Bacillus thuringiensis israelensis, is a naturally occurring bacterium that targets the larvae of mosquitoes, fungus gnats, and blackflies. Because it is specific to these insects, it is often marketed as a safer alternative to broad-spectrum chemical insecticides [1].

Retailers in various regions said these dunks are disappearing from shelves faster than they can be restocked [2]. The surge in demand is particularly acute in areas where residents have reported a worse-than-usual mosquito season [1]. This has led many consumers to seek the product in bulk to keep up with the requirements of the TikTok-inspired method [1, 2].

While the "bucket of doom" has gained traction for its perceived effectiveness, the sudden spike in usage has left some consumers unable to find basic larvae control products for their ponds, or standing water [2]. The trend highlights how quickly digital platforms can shift consumer behavior and impact supply chains for seasonal home and garden products [1].

“Mosquito dunks are selling out across Canada as a viral TikTok trend and a severe mosquito season increase demand”

This situation demonstrates the 'TikTok effect' on physical supply chains, where a single viral DIY hack can create artificial shortages of niche products. The reliance on BTI tablets—a biological control agent—suggests a growing consumer preference for targeted, non-toxic pest management over traditional chemical sprays during peak summer months.