GrazonPro offers good control of cow parsley when used at the rosette stage. It is for spot treatment only.
Forefront T and PastorPro can be applied through tractor mounted hydraulic sprayers. Forefront T offers moderate control of cow parsley. Forefront T use is limited to grass grazed by cattle and sheep only. Although not as effective at Forefront T, PastorPro offers some control of cow parsley and can be used on field including those for silage and hay.