Citrus sudden death-associated virus (CSDaV) and citrus tristeza virus (CTV) in eleven rootstocks for ‘Valência’ sweet orange

Abstract

Citrus sudden death (CSD) is a highly destructive disease and has caused the eradication of millions of trees in southern Brazil within the last 15 years. In spite of the exact cause of CSD has not been determined, evidences have shown that this disease can be transmitted by biotic vectors. Disease incidence in sweet orange scions is related to the rootstock, and the combination with ‘Rangpur’ lime is the most affected. On the other hand, there are evidences of a relation between CSD affected trees and the presence of the Citrus sudden death associated virus (CSDaV) and/or Citrus tristeza virus (CTV). Based on such information, this study has been carried out to determine the presence of CSDaV and CTV, and the association between each other in eleven rootstocks for ‘Valencia’ sweet orange. The results presented herein showed differences related to the presence of CSDaV and CTV in different rootstocks for ‘Valencia’ sweet orange and no relation between the presence of CSDaV and CTV.

Plum pox virus infection level in Prunus species growing along roadsides or in backyards in Vojvodina province

“…Even though different eradication measures can be applied to mitigate the effects of all possible infection sources, most such measures need high financial investments and support from government institutions, and must also be very well organized and synchronized. A good example of such strategy is Brazil, where 4 million trees deemed a potential infection source had been destroyed over a short period in order to combat the Citrus tristeza virus, and citrus production was subsequently raised from the ashes (Fadel et al 2018). Similar effort was made in Puglia Province in Italy (Boscia, personal communication).…”

Initial production and fruit quality of fifty-seven sweet orange varieties on four rootstocks in southern state of Bahia

“…Despite the wide variety of genetic material from sweet oranges, the national citrus industry predominantly uses 'Pera' and 'Valencia' orange cultivars on 'Rangpur' and 'Citrumelo Swingle' rootstocks. This makes crops susceptible to losses due to the onset of diseases such as Phytophthora gummosis, citrus tristeza virus and citrus sudden-death (FADEL et al, 2018;RODRIGUES et al, 2016;.…”