Abstract
Efficient disease management is critical in the production of citrus; a crop that is susceptible to several plant pathogens. The ongoing battle with citrus greening has led to a shift in cultural practices, which could lead to a resurgence of previously controlled diseases. Here we investigated the presence of several common citrus-infecting viruses and viroids (Citrus leaf blotch virus, Apple stem grooving virus (synonym: Citrus tatter leaf virus), Citrus exocortis viroid, Hop stunt viroid (synonym: Citrus viroid II), and Citrus dwarfing viroid (synonym: Citrus viroid III) in Florida citrus groves. All five viruses and viroids are still present, with varying incidence. It would be prudent to take them into consideration when developing citrus disease management strategies.
Highlights
Citrus production in Florida has often faced challenges from plant pathogens, but citrus greening is the foremost concern of the Florida citrus industry today
We previously showed that Citrus tristeza virus (CTV), which can pose a serious risk to citrus production, is still widespread throughout the state (Harper and Cowell 2016)
Apple stem grooving virus (ASGV, synonym: Citrus tatter leaf virus) and Citrus dwarfing viroid (CDVd, synonym: Citrus viroid III) have been found to stunt the growth of trees grown on trifoliate orange and hybrids
Summary
Nowhere in the US has citrus held more importance than in Florida, where 56% of the country’s citrus is produced (Neupane 2016). Citrus exocortis viroid (CEVd) causes bark scaling, dwarfing, and reduced yield on trifoliate orange and hybrid rootstocks (Broadbent and Garnsey 1987; Duran-Vila 2017). In this study we built upon the previous CTV survey, searching for common citrus-infecting viruses and viroids present in commercial citrus groves throughout Florida.
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