Clay Offers Hope for Vine Disease | WineSearcher News ...
· In California, however, Ridge Vineyards is finding that a dusting of kaolin clay might be a sufficient deterrent to bluegreen sharpshooters for it to contemplate replanting the seven acres of Chardonnay it has lost to Pierce's. The insects don't like the white color of the clay and, if they try to feed on the sap of treated vines, which is how ...