I’ve often wondered why most of the vineyards I see in the Yarra Valley have a rose bush at the end of each row. My best guess was that it attracted the bees to fertilise the grape flowers, but Bern put an end to the controversy by asking someone at a wine tasting….
The answer is: If there are any afids about, the attack the roses first and provide warning before they get to the grape vines. Kind of like the Miner’s Canary.