Contains Lambda Cyhalothrin 10% WP(Wettable Powder). It is a broad spectrum Pyrethroid Insecticide used as a residual spray against vector and public health pests like mosquitoes. Culexon gives a rapid knock down effect, has residual activity that will last for 6 months and has a repellent properties. Culexon is available in 12.5g,32.5g and 62.5g.