Researchers at the USDA-Agricultural Research Service examined the effectiveness of two organic dusts, known as Surround and CimeXa, when applied directly to lone star tick (Amblyomma americanum) larvae and nymphs (shown here). The lone star tick was used in the study as a model, as the researchers hope the dusts could be a useful tool against other tick species that transmit deadly pathogens to livestock. (Photo credit: James Gathany, CDC Public Health Image Library)