Abstract
During the late winter and early spring of 1960, and again to a lesser extent in 1961 and 1962, many lettuce crops in the Murray Valley area of north-western Victoria were seriously affected by a disease characterized by blackening, dry rotting, and collapse of the affected leaves. The incidence of disease varied from about 10% up to practically complete destruction of some plantings. A yellow bacterium was consistently isolated from affected plants and proved to be pathogenic to lettuce. Laboratory studies have shown that the organism agrees closely with the recorded description of Xanthomonas vitians (Brown) Dowson, which has not, apparently, been previously studied in Australia.
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Claims 4
Claim · model-written summary
Lettuce leaves showed blackening, dry rot and collapse in affected crops.
- Taxon
- lettuce
Lactuca sativae0 - Organ / stage
- leavese0
- Outcome
- blackening, dry rotting, and collapse of the affected leavese0
- Setting
- Murray Valley area of north-western Victoriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“many lettuce crops in the Murray Valley area of north-western Victoria were seriously affected by a disease characterized by blackening, dry rotting, and collapse of the affected leaves”
Claim · model-written summary
Disease incidence ranged from about 10% to near complete destruction of plantings.
- Taxon
- lettuceLactuca sativat0
- Outcome
- incidence of diseasee0
- Direction
- variede0
- Value
- about 10%e0
- Qualifier
- practically complete destruction of some plantingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The incidence of disease varied from about 10% up to practically complete destruction of some plantings”
t0“Leaf spot and dry rot of lettuce caused by Xanthomonas vitians (Brown) Dowson”
Claim · model-written summary
A yellow bacterium isolated from affected plants was pathogenic to lettuce.
- Taxon
- lettuceLactuca sativae0
- Interactor
- A yellow bacteriume0pathogen
- Outcome
- proved to be pathogenic to lettucee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A yellow bacterium was consistently isolated from affected plants and proved to be pathogenic to lettuce”
Claim · model-written summary
The isolate closely matched the recorded description of Xanthomonas vitians.
- Taxon
- lettuceLactuca sativat0
- Interactor
- Xanthomonas vitians (Brown) DowsonXanthomonas hortorum pv. vitianse0pathogen
- Outcome
- agrees closely with the recorded description of Xanthomonas vitians (Brown) Dowsone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the organism agrees closely with the recorded description of Xanthomonas vitians (Brown) Dowson”
t0“Leaf spot and dry rot of lettuce caused by Xanthomonas vitians (Brown) Dowson”