Abstract
Among the viruses that have been discovered infecting coffee plants, the coffee ringspot virus (CoRSV) is the only one related to field losses. CoRSV is a Dichorhavirus (Rhabdoviridae family) transmitted by the false spider mite Brevipalpus sp. (Acari: Tenuipalpidae) and is widely spread in Brazilian coffee-producing areas. CoRSV infects coffee plants at any stage of development, inducing discolored and chlorotic spots on cherries, leaves, and branches of plants. The dropping of infected coffee leaves reduces the photosynthesis area, resulting in lower productivity. Furthermore, infected cherries show a decrease in weight and have a worse beverage quality when compared with healthy ones. Although CoRSV is not capable of systemically infecting coffee plants, at higher temperatures, systemic spread can occur in some alternative hosts. This chapter will address aspects related to etiology, ecology, and management of this unique virus, a threat to coffee productivity and quality.
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