Rose Rosette Disease (RRD) is a lethal disease of roses caused by rose rosette virus. The virus is mainly spread by a microscopic eriophyid mite from infected to healthy plants. The disease can also spread over long distances when infected plants are shipped from one place to another. RRD is specific to Rosa spp. and most cultivated roses are susceptible to it. It poses a major threat to the rose industry, as well as ornamental landscapers and gardeners.