'' If I ask an old Greek lady sitting in the vineyard, "Why did you plant roses in your grapes?" Will she say to me, "Because the rose is the doctor of the grape. If you do not plant roses, the grapes get ill." she will answer me: "Because the rose is the doctor of the grape. If you do not have roses, grapes get sick. "
If I can find that the rose gives off a chemical that some roots emerge and then be picked up by the roots of grapes which in turn pushes the white fly (which is the scientific way of saying the same thing), so I have something very useful.