Mosi guard natural insect repellent spray is a powerful natural insect repellent recommended for adults and children from 6 months for use in high and low risk areas where malaria and other insect transmitted diseases are present the active ingredient comes from a botanical oil found in the leaves of the eucalyptus citriodora tree this is responsible for the repellency of mosi guard natural products repels mosquitoes midges ticks sand flies land leeches black flies stable flies