Stop those eight-legged crawlers in their tracks with the best spider killer and repellent formulas on the market. BobVila.com and its partners may earn a commission if you purchase a product through one of our links. Photo: amazon.com North America is home to 3,000 species of spiders. The vast majority of these arachnids are not dangerous, more of a nuisance than reason for fear. However, limited species, among them brown recluse spiders and black widow spiders, can cause real harm (though bites are rarely fatal). Between inducing fear or annoyance, dealing with an infestation, or keeping dangerous local species at bay—a DIY pest control program may be all that's necessary. The best spider killer contains potent chemical or natural compounds. These formulas are great for repelling or killing spiders and continue to work days, weeks, or months after application. Keep reading to learn about insecticide spray, dust, glue traps, and natural insect repellents. With the shopping consi...