“…Damage in the vegetative development and yield of soursop fruit caused by the soursop yellow blotch virus (SYBV) was studied by Santos et al (2007), who showed that the disease reduced plant height and stem diameter by 65.11% and 46.72%, respectively, and the number and weight of fruit by 94.7% and 99.2%, respectively, compared to healthy plants. To characterize and quantify the damages caused by citrus sudden death, Bassanezi et al (2005) evaluated the fruit yield of citrus cultures in the north region of São Paulo state and in the southeast region of Minas Gerais state (commonly known as the "Triângulo Mineiro"), in Brazil.…”