Reducing the number of deer ticks in a yard can reduce the risk of Lyme disease. But no strategies are a sure thing. Scott Bauer/USDA/Flickr hide caption toggle caption Scott Bauer/USDA/Flickr Shots - Health News Taking The Battle Against Lyme Disease Ticks To The Backyard July 20, 2016 Scientists have tested all sorts of strategies to keep Lyme disease ticks from biting us. One is to make it less likely you'll cross paths with the critters in your yard. Sawdust mulch, anyone?