They are not long, the days of wine and roses:
Out of a misty dream —Vitae Summa Brevis by Ernest Dowson
Why are roses planted at the end of each row of grape vines?
I somehow thought that it was to help identify whether grapes were white or red because I saw white roses or red roses planted in front of differing rows of grapes. But actually it’s more of a canary in a coal mine reason.
Humidity helps the disease spread and one of the signs of an infected vine is white felting on the foliage and grapes. Another reason for the presence of roses harks back to the days when horses and oxen were commonly used to plough the vineyards. Rosebushes at the end helped the animals navigate the vine rows. Idealwine