Published 2015-07-10
Keywords
- Oomycetes,
- South Vietnam,
- ITS regions,
- A1 mating type
How to Cite
Copyright (c) 2015 Mai Van TRI, Nguyen VAN HOA, Nguyen MINH CHAU, Antonella PANE, Roberto FAEDDA, Alessandro DE PATRIZIO, Leonardo SCHENA, Christer OLSSON, Sandra WRIGHT, Mauritz RAMSTEDT, Santa Olga CACCIOLA
This work is licensed under a Creative Commons Attribution 4.0 International License.
Abstract
A new disease of jackfruit (Artocarpus heterophyllus Lam.) was observed in the south- eastern region of South Vietnam. Symptoms included root rot, cankers and gummosis of trunks, chlorosis, wilt, blight of leaves, defoliation, fruit brown rot, and tree death. The disease was found in 10% of surveyed farms with an incidence varying from 2% to nearly 60% of the trees. A Phytophthora species, identified as P. palmivora (Butler) Butler, using the ITS1-5.8S-ITS2 region of the rDNA as a barcode gene and morphological and cultural features, was consistently isolated from symptomatic roots, fruits, trunk cankers and leaves. Koch’s postulates were fulfilled using pathogenicity tests on seedlings, leaves and detached fruits of jackfruit. To our knowledge, this is the first report of P. palmivora on jackfruit in Vietnam.