DEET and PMD spray-on repellents most effective at repelling mosquitoes

In a crowded marketplace of products advertised to repel mosquitoes, consumers are wise to trust spray-on repellents containing DEET or PMD, say researchers. In a comparison study of several mosquito-repellent products, 'wearable' devices such as bracelets or sonic repellers were found to be largely ineffective in repelling Aedes aegypti mosquitoes.