Grubbing or mowing is not recommended as ragwort will grow from root fragments.
Hand pulling plants is useful in small infestations but must be done before the plants set seed and any flower heads must be destroyed by burning to prevent the seeds from ripening.
Sheep are useful in grazing to control ragwort, but this method does not kill the plants which will still regrow.
Use a herbicide. Using herbicides to control ragwort is very effective if the correct timing and rates of application are used. Always follow the manufacturer’s directions on the product label and avoid spraying if it will rain before the spray is rain-fast. The rain-fast times for herbicides vary widely by up to five hours so it pays to check, rather than waste spray.
on using herbicides