Diagnosis and management of halo blight in Australian mungbeans: a review
Thomas J. Noble
A , Anthony J. Young B , Colin A. Douglas C , Brett Williams A and Sagadevan Mundree A D
+ Author Affiliations
- Author Affiliations
A Centre for Tropical Crops and Bio Commodities (CTCB), Queensland University of Technology, Brisbane City, Qld 4000, Australia.
B School of Agriculture and Food Sciences, The University of Queensland, Gatton, Qld 4343, Australia.
C Department of Agriculture and Fisheries (DAF), Hermitage Research Facility, Warwick, Qld 4370, Australia.
D Corresponding author. Email: sagadevan.mundree@qut.edu.au
Crop and Pasture Science 70(3) 195-203 https://doi.org/10.1071/CP18541
Submitted: 29 November 2018 Accepted: 8 February 2019 Published: 18 March 2019
Journal Compilation © CSIRO 2019 Open Access CC BY-NC-ND
Abstract
Mungbean (Vigna radiata L. Wilczek var. radiata) is an important food crop cultivated on over 6 Mha throughout the world. Its short duration of 55–70 days, capacity to fix atmospheric nitrogen, and exceptional grain nutritional profile makes the crop a staple for smallholder and subsistence farmers. In Australia, mungbean is grown as a high-value export crop and established as a main summer rotation for dryland farmers. A major threat to the integrity of the industry is halo blight, a bacterial disease leading to necrotic lesions surrounded by a chlorotic halo that stunts and ultimately kills the plant. Caused by Pseudomonas savastanoi pv. phaseolicola, this seed-borne disease is extremely difficult to control, resulting in significant yield loss and production volatility. The challenge of managing halo blight is exacerbated by a wide host range that includes many legume and weed species, and the presence of multiple epidemiologically significant strains. Molecular technologies could play a pivotal role in addressing these issues. This review synthesises current and emerging technologies to develop improved management strategies for the control of halo blight in mungbean.
Additional keywords: bacterial pathogen, disease management, host–pathogen interactions, molecular characterisation.
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