Australasian Plant Pathology (1990) 19, 16-21

B.A. Wood and W.J. Easdown (1990)
A new bacterial disease of mung bean and cowpea for Australia
Australasian Plant Pathology 19 (1), 16-21
Abstract: A new bacterial disease was detected on Vigna radiata crops in 1984 in central and southern Queensland. The symptoms were marginal and interveinal necrosis of the leaves with vascular browning in a small percentage of affected plants. No wilting was observed. The same symptoms were later detected on cowpeas in southern Queensland. Disease incidence in the commercial crops of V. radiata and cowpea surveyed, ranged from leaf symptoms on an occasional plant to 5-8% of the crop affected. However, disease incidence as high as 90% has been reported from other districts. The disease appeared to be most severe in rain-grown crops suffering from moisture stress. The pathogen was identified as Curtobacterium flaccumfaciens pv. flaccumfaciens by biochemical tests and host pathogenicity. It was shown to be seed transmissible by artificial seed inoculation and pathogenic to soyabeans and Phaseolus vulgaris but not to tomato. A toxin was involved in pathogenesis.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Curtobacterium flaccumfaciens	Cowpea and relatives (Vigna)	Australia (NT+QLD)