First report of Pantoea stewartii subsp. stewartii in Vietnam
In Vietnam, a new bacterial disease of jackfruit (Artocarpus heterophyllus) called ‘bronzing disease of Thai jackfruit’ was first observed in 2016. Subsequently, it spread over all jackfruit-growing areas including Tien Giang, Ho Chi Minh City, Dong Nai, Lam Dong, Hau Giang, Long An, and Dong Thap provinces, causing significant losses for farmers.
Morphological and molecular analysis, as well as pathogenicity tests showed that the pathogen involved was Pantoea stewartii subsp. stewartii (EPPO A2 List). Host range testing showed that it can also affect other tropical fruits such as mango (Mangifera indica), longan (Dimocarpus longan) and durian (Durio zibethinus), as well as a range of other crops: spinach mustard (Brassica juncea), tomato (Solanum lycopersicum), cucumber (Cucumis sativus), pumpkin (Cucurbita maxima), sweet potato (Ipomoea batatas), maize (Zea mays), rice (Oryza sativa), water spinach (Ipomoea aquatica), peanuts (Arachis hypogaea) and bean (Phaseolus aureus).
The situation of Pantoea stewartii subsp. stewartii in Vietnam can be described as follows: Present, widely distributed on jackfruit.
Sources
Ha VT, Hoang LK, Huyen PK (2024) Pantoea stewartii subsp. stewartii, the causative agent of Thai jackfruit’s bronzing disease and its possible host range in Vietnam. Journal of Plant Protection Research 64(2), 149-157. https://doi.org/10.24425/jppr.2024.150249