|CORNEJO-FRANCO, JUAN - Centro De Investigaciones Biotecnologicas Del Ecuador
|REYES-PROANO, EDISON - Centro De Investigaciones Biotecnologicas Del Ecuador
|QUITO-AVILA, DIEGO - Centro De Investigaciones Biotecnologicas Del Ecuador
Submitted to: Plant Disease
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 10/1/2021
Publication Date: 2/6/2022
Citation: Cornejo-Franco, J., Reyes-Proano, E., Mollov, D.S., Mowery, J.D., Quito-Avila, D. 2022. Transmission and pathogenicity of papaya virus E: insights from an experimental papaya orchard. Plant Disease. https://doi.org/10.1094/PDIS-08-21-1785-RE.
Interpretive Summary: Papaya is a tropical fruit used for fresh consumption in many parts of the world. Papaya production is hindered by plant viruses. In this study we investigated the epidimiology of papaya virus E (PpVE). Transmission experiments with whyteflies showed that PpVE can be efficiently transmitted by this vector. Additionally we discovered that some weeds grown in papaya orchards host the virus and that when PpVE co-infects plants with other viruses symptomology and disease is more pronounced. These findings will help growers and orchard managers facilitate better control strategies for this viral disease.
Technical Abstract: A study was conducted to investigate epidemiological aspects of papaya virus E (PpVE), a cytorhabdovirus commonly found in papaya (Carica papaya) plantings of Ecuador. Besides papaya, PpVE was found in three Fabaceae weeds, including Rynchosia minima, Centrocema plumieri and Macroptilium lathyroides; the latter being the species with the highest virus prevalence. Greenhouse experiments showed that in M. lathyroides, single infections of PpVE induce only mild leaf mosaic, whereas in mixed infections with cowpea severe mosaic virus, PpVE induces severe mosaic. In papaya, PpVE did not induce discernable symptoms either in single or mixed infections with papaya ringspot virus. Transmission experiments confirmed that whiteflies (Bemisia tabaci) transmit PpVE in a semi-persistent, non-propagative manner.