Poison weed is having a field day
These posters were displayed in many Garda stations decades ago. I recall gardaí in the Whitechurch/Rathduff area near Cork city cycling out to warn farmers about the concentration of these weeds, particularly ragwort — the yellow one.
On many farms (including our own) we had either to cut or pull them by hand or, if the concentration was very dense, cut them with a horse-drawn mower before they were collected and burned.