- BAY 78418
- Bayer 78418
- O-ethyl S,S-diphenyl phosphorodithioate
- O-Ethyl-S,S-diphenyl dithiophosphate
- Phosphorodithioic acid, O-ethyl-S,S-diphenyl ester
||An organic thiophosphate that is the O-ethyl-S,S-diphenyl ester of phosphorodithioic acid. Used to control a variety of fungal diseases on rice including blast, ear blight and stem rot. Edifenphos is moderately toxic to mammals and fish but poses more of a risk to aquatic invertebrates.