Citronella Spray for room spray. It can also be sprayed on clothing. Drives away mosquitoes. Smells like fragrant citronella which does not contain harmful chemicals Research has shown that the topical application of 100% citronella can provide complete protection against three types of mosquito for up to 120 minutes in a laboratory setting. People traveling to areas where mosquitoes carry diseases may wish to use a more effective synthetic repellent than citronella.