Met Éireann has issued a status yellow advisory for blight for Galway and all other counties in the State.
The warning was issued this afternoon and it is set to remain in place until midnight on Monday, 9 May.
Met Éireann said that from Friday morning until Monday, weather conditions conductive to the spread of potato blight will affect many coastal regions, mostly of the south and east.
There will also be a marginal risk in parts of the midlands and the mid-west of Ireland.
There will be opportunities for spraying today, Thursday 4 May, over the northern half of the country through the early afternoon.
There will be further limited opportunities in the morning hours of Friday 5 and Saturday 6 May.