Yes, citronella bracelets can be effective in repelling mosquitoes. These bracelets contain citronella oil, which is known to deter insects. When worn on the wrist or ankle, the oil releases a scent that masks the attractant odors that mosquitoes are drawn to. As a result, mosquitoes are less likely to bother individuals wearing citronella bracelets. However, it's important to note that the effectiveness of these bracelets can vary depending on factors such as the concentration of citronella oil and individual body chemistry. Some people may find citronella bracelets to be highly effective, while others may experience limited or no repellent effects. It's recommended to use citronella bracelets in conjunction with other mosquito control measures, such as wearing protective clothing and using insect repellents to enhance their effectiveness.