Deltashi Deltamethrin 12.5 g/L EC is a broad-spectrum pyrethroid insecticide containing 12.5 g/L deltamethrin in an emulsifiable concentrate (EC) formulation. It provides fast knockdown and residual control of crawling and flying insects such as mosquitoes, cockroaches, ants, termites, flies, and other household and agricultural pests. Use only as directed on the product label and observe recommended safety precautions.