ISHS Acta Horticulturae 550: XVIII International Symposium on Virus and Virus-like Diseases of Temperate Fruit Crops - Top Fruit Diseases
APHIDS CAN ACQUIRE PLUM POX VIRUS FROM INFECTED FRUITS |
| Authors: | G. Labonne, J.B. Quiot |
| Keywords: | Virus transmission, Virus dissemination, Prunus |
| Abstract:
Stone fruit trees can produce fruits even after Plum pox virus (PPV) infection. These fruits can be left in the orchard if unmarketable or marketed if symptomless, elsewhere and possibly thrown away at this new place. Hence, if infected fruits can be a virus source for aphids, they provide a way of dissemination of PPV. To test the hypothesis that PPV could be acquired from infected fruits, we used apricots and peaches produced from trees infected by PPV strains D and M and maintained under an insect proof screenhouse. Four stages of maturity were assessed, from the beginning of fruit formation to a post-maturity stage. Transmissions were carried out by Myzus persicae. Test plants were seedlings of Prunus persicae cv GF 305. We demonstrate that aphids can transmit PPV from infected apricots or peaches to peach seedlings, even from symptomless fruits. Both PPV strains were transmitted. Transmissions were obtained at all the stages of fruit ripening, even with rotting fruits. To demonstrate that aphids can land on fruits, healthy fruits were glued and exposed in trays under field conditions. Aphids belonging to several species (including known PPV vectors) were caught. Infected fruits can thus be a virus source for aphids and can provide a pathway for PPV dissemination. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
