Pyranha 1-10 PX is a mosquito misting system and ULV fogging concentrate with 10% Permethrin and 10% Piperonyl butoxide for more effective flying and crawling insect control. Pyranha 1-10 PX kills mosquitoes, cockroaches, wasps, moths, asian lady beetles, crickets, spiders and other small biting/flying insects. Pyranha 1-10 PX is water-based.