At this time, winegrowers, to protect their vines from the dangers of mildew, planted amongst their vines peach trees which were very sensitive to this parasitic fungus. They were, in a sense, tell-tales or sentries who by developing the initial symptoms of the disease gave the alert and thus warned of the attack.
A cette époque, les viticulteurs, pour protéger leurs vignes des dangers de l’oïdium, plantaient au milieu de leur vignoble des pêchers très sensibles à ce champignon parasite.