Endothall is an herbicide that is used to control a wide range of terrestrial and aquatic plants. It is a contact herbicide that inhibits translation and induces the production of ethylene in some plants.[1],[2] Endothall has a half-life of approximately four days in experimental pools.[3]

Reference:
[1].Leonard, I.A., and Glenn, R.K.Translocation of assimilates and phosphate in detached bean leavesPlant Physiology43(9)1380-1388(1968)
[2].Abeles, A.L., and Abeles, F.B.Biochemical pathway of stress-induced ethylenePlant Physiology50(4)496-498(1972)
[3].Reinert, K.H., Rodgers, J.H., Jr., Himan, M.L., et al.Compartmentalization and persistence of endothall in experimental poolsEcotoxicology and Environmental Safety10(1)86-96(1985)