Chickweed, Clover And Oxalis Killer Ready-To-Use is convenient for spot treating the most vexing lawn weed problems. Obliterates oxalis, clobbers clover, destroys dandelions, slaughters spurge, ground ivy is gone, chickweeds check-out. Fast acting. Kills to the root. Rainfast in hours. Active ingredient: horsepower (triclopyr, MCPA, dicamba).