Indications: Insecticide in effervescent tablets for the control of mosquito larvae in breeding grounds. How to use Apply directly in the breeding grounds of mosquito larvae such as stagnant water ditches, canals, ponds, puddles, pots of cut flowers under saucers, tires, fountains and small bodies of water and in systems closed plumbing such as manholes, septic tanks, purification tanks in both urban and agricultural areas.Repeat the treatments every 3-4 weeks in the spring summer period, in correspondence of the reproduction of the mosquitoes.1 tablet for 40 liters of water in case of very polluted organic waters. Characteristics-Acts by ingestion and contact against mosquito larvae. It interferes with the formation of chitin in the cuticle of mosquito larvae, blocking its normal moulting process.