Abstract
Abstract Ralstonia solanacearum is responsible for bacterial wilt affecting many crops worldwide. The emergent population of R. solanacearum (phylotype IIB /4 NPB ) wilts previously resistant varieties and has rapidly spread throughout Martinique. No conventional method is known to control it. In this study, previous crops used as sanitizing crops were investigated as an environmentally safe alternative method of control. The ability of the emergent population of R. solanacearum to persist in planta and in the rhizosphere of Brassicaceae, Asteraceae and Fabaceae grown as previous crops was evaluated in controlled conditions, and the incidence of bacterial wilt was assessed in the following tomato crop. Results showed that all species carried R. solanacearum latently. Among Brassicaceae and Asteraceae, the highest density of R. solanacearum was found in planta and in the rhizosphere of Tagetes erecta . The density of the R. solanacearum population in the rhizosphere of Raphanus sativus cv . Karacter was significantly higher than that in Raphanus sativus cv . Melody. In Fabaceae, the density of R. solanacearum population in planta was statistically similar in all species. The density of the R. solanacearum population in the rhizosphere of Crotalaria juncea was significantly higher than that in Crotalaria spectabilis . This study showed for the first time that Crotalaria spectabilis and Raphanus sativus cv . Melody grown as previous crops improve the performance of the following tomato with similar effects on R. solanacearum populations in the soil as bare soil. The incidence of the disease in tomato decreased by 86% and 60%, after R. sativus cv . Melody and C. spectabilis, respectively, and the proportion of infected plants also decreased. These results suggest that C. spectabilis and R. sativus cv . Melody can be used as previous crops to help bacterial wilt control in ecological management strategies without drastic suppression of R. solanacearum population in stem tissues and in the rhizosphere.
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Claims 9
Claim · model-written summary
All previous-crop species latently carried R. solanacearum.
- Interactor
- R. solanacearum
Ralstonia solanacearume0pathogen - Outcome
- carried R. solanacearum latentlye0
Not reportedTaxonDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results showed that all species carried R. solanacearum latently.”
Claim · model-written summary
Tagetes erecta had the highest R. solanacearum density among the Brassicaceae and Asteraceae tested.
- Taxon
- Tagetes erecta
Tagetes erectae0 - Interactor
- R. solanacearumRalstonia solanacearume0pathogen
- Outcome
- density of R. solanacearume0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest density of R. solanacearum was found in planta and in the rhizosphere of Tagetes erecta”
Claim · model-written summary
Raphanus sativus Karacter had higher rhizosphere pathogen density than Melody.
- Taxon
- Raphanus sativus
Raphanus sativuse0 - Material
- Karactere0
- Interactor
- R. solanacearumRalstonia solanacearume0pathogen
- Outcome
- density of the R. solanacearum populatione0
- Direction
- highere0
- Comparator
- Raphanus sativus cv . Melodye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The density of the R. solanacearum population in the rhizosphere of Raphanus sativus cv . Karacter was significantly higher than that in Raphanus sativus cv . Melody.”
Claim · model-written summary
Fabaceae had similar in-plant R. solanacearum density across species.
- Interactor
- R. solanacearumRalstonia solanacearume0pathogen
- Outcome
- density of R. solanacearum populatione0
- Direction
- statistically similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In Fabaceae, the density of R. solanacearum population in planta was statistically similar in all species.”
Claim · model-written summary
Crotalaria juncea had higher rhizosphere pathogen density than C. spectabilis.
- Taxon
- Crotalaria juncea
Crotalaria junceae0 - Interactor
- R. solanacearumRalstonia solanacearume0pathogen
- Outcome
- density of the R. solanacearum populatione0
- Direction
- highere0
- Comparator
- Crotalaria spectabilise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The density of the R. solanacearum population in the rhizosphere of Crotalaria juncea was significantly higher than that in Crotalaria spectabilis .”
Claim · model-written summary
Raphanus sativus Melody as previous crop reduced tomato wilt incidence by 86%.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- R. sativus cv . Melodye0
- Outcome
- incidence of the diseasee0
- Direction
- decreasede0
- Value
- 86%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The incidence of the disease in tomato decreased by 86% and 60%, after R. sativus cv . Melody and C. spectabilis, respectively”
Claim · model-written summary
Crotalaria spectabilis as previous crop reduced tomato wilt incidence by 60%.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- C. spectabilise0
- Outcome
- incidence of the diseasee0
- Direction
- decreasede0
- Value
- 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The incidence of the disease in tomato decreased by 86% and 60%, after R. sativus cv . Melody and C. spectabilis, respectively”
Claim · model-written summary
The two previous crops reduced the proportion of infected tomato plants.
Not reportedTaxonTreatmentComparator
Verbatim
e0“the proportion of infected plants also decreased.”
Claim · model-written summary
The authors propose C. spectabilis and R. sativus Melody as preceding crops for ecological wilt management.
- Outcome
- used as previous crops to help bacterial wilt controle0
Not reportedTaxonDirection
Verbatim
e0“C. spectabilis and R. sativus cv . Melody can be used as previous crops to help bacterial wilt control in ecological management strategies”
The same questions in other papers
Crotalaria spectabilis · disease · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.