A virus causing ringspot of Passiflora edulis in the Ivory Coast

Abstract

SUMMARYA mechanically transmissible virus causing leaf mottling and ringspotting of Passiflora edulis var. flavicarpa in the Ivory Coast is described. Its particles are flexuous rods 810–830 nm long and 15 nm wide. It infects mainly species of Passifloraceae and Leguminosae; Passiflora foetida is a good diagnostic host. Aphis gossypii and Aphis spiraecola transmit the virus after brief acquisition feeds. Seed transmission was not detected. In crude sap of P. edulis, infectivity was lost after 10 min at 65–70 °C, 12–14 days at 24 °C or dilution to 10‐7. A purification method is described, using Triton‐X‐100 as clarifying agent. The virus is serologically related but not identical to passionfruit woodiness virus from Queensland. The virus seems to belong to the potato virus Y group and has the cryptogram */*:*/(6):E/E:S/Ap. It is designated passionfruit ringspot virus.

Virus and Phytoplasma Diseases of Passion Fruit

“…Flavicarpa in the Ivory Coast, shriveled fruits with a reduced pulp cavity were also found, however, without "woodiness" (De Wijs, 1974a). De Wijs and Mobach (1975) isolated passion ringspot virus from Adenia lobata in Ivory Coast.…”

“…Two aphid species i.e. Aphis gossypii and A. spiraecola transmit this virus in a nonpersistent manner (De Wijs, 1974a). No seed transmission has been reported.…”

“…It is therefore confirmed that A. lobata is good host for the perpetuation of PRV. It was concluded that Adenia lobata is the original host plants of the virus (De Wijs, 1974a). Aphis spiraecola is the potential of this virus.…”

“…Virus particles are flexuous rods (not enveloped) measuring 15 x 750-95 nm with a model length of 810 -830 nm (De Wijs, 1974a). Axial canal obscure.…”

“…The virus infects a number of hosts belonging to different families (De Wijs, 1974a). These are as follows: …”