Did you know that rose bushes are often planted at the end of a row of grape vines to act as an early warning signal for infestation by diseases and insects like aphids?
Roses and vines have in common is that they are susceptible to the same diseases. Planting a rose bush at the end of each vineyard row, you'll be able to detect early symptoms of disease.
Roses and grapevines are both susceptible to a fungus called powdery mildew. In fact, roses are more sensitive than grapevines.
Sulphur won't cure powdery mildew, but it can prevent it. So, if a grape grower noticed that one day his roses had powdery mildew, he knew it was immediately time to spray sulphur on his grapes to prevent them from getting the same disease.
Roses also serve as a habitat for some beneficial insects that eat other undesirable insects – such as ladybirds who are particularly fond of aphids!
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