A UK-based chemical company, Ximed Group, is claiming to have found a natural formulation that can successfully eradicate Pierce's disease, the debilitating vine infection that has caused millions of dollars of damage to the US wine industry in recent years. The company specialises in the application of terpene, which is a naturally occurring low toxicity botanical substance, in agriculture and pharmacy. And it is this botanical, Ximed says, that has been adapted to cure the insect transmitted disease.