Pierce's Disease: This bacterial disease, frequently spread by insects such as glassy-winged sharpshooters and blue-green sharpshooters, kills vines within a few years of infestation; there are no known preventatives (other than quarantine) and no known cures. It is a problem in California; both grapegrowers and government organizations are working to find solutions to stop the disease from spreading to healthy vineyards.

皮尔斯病害：是一种细菌疾病，常由叶蝉或沫蝉这样的昆虫传播，经过几年的侵染，葡萄藤就会死亡；目前还没有什么预防方法（除了检疫），也没有治愈的例子。这个问题存在于加州；葡萄种植者和政府机构都在努力寻求可以阻止这种疾病扩散到健康葡萄园的解决办法。