Crotalaria spectabilis and Raphanus sativus as previous crops show promise for the control of bacterial wilt of tomato without reducing bacterial populations

Deberdt Peninna, Gozé Eric, Coranson Beaudu Régine, Perrin Benjamin, Fernandes Paula, Lucas Philippe, Ratnadass Alain. 2015. Crotalaria spectabilis and Raphanus sativus as previous crops show promise for the control of bacterial wilt of tomato without reducing bacterial populations. Journal of Phytopathology, 163 (5) : 377-385.

Quartile : Q3, Sujet : PLANT SCIENCES

Résumé : Ralstonia solanacearum is responsible for bacterial wilt affecting many crops worldwide. The emergent population of R. solanacearum (phylotype IIB/4NPB) 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.

Mots-clés Agrovoc : Crotalaria, Raphanus sativus, Ralstonia solanacearum, maladie des plantes, rhizosphère, rotation culturale, lutte biologique, relation hôte pathogène, résistance aux maladies, Brassicaceae, Asteraceae, Fabaceae, tomate

Mots-clés géographiques Agrovoc : Martinique, France

Classification Agris : H20 - Maladies des plantes
F07 - Façons culturales
H01 - Protection des végétaux - Considérations générales

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

• Deberdt Peninna, CIRAD-PERSYST-UPR HortSys (MTQ) ORCID: 0000-0001-9349-8335
• Gozé Eric, CIRAD-PERSYST-UPR AIDA (FRA) ORCID: 0000-0001-9121-7835
• Coranson Beaudu Régine, CIRAD-PERSYST-UPR HortSys (MTQ) ORCID: 0009-0004-1310-2118
• Perrin Benjamin
• Fernandes Paula, CIRAD-PERSYST-UPR HortSys (MTQ) ORCID: 0000-0001-7668-8700
• Lucas Philippe, INRA (FRA)
• Ratnadass Alain, CIRAD-PERSYST-UPR HortSys (FRA) ORCID: 0000-0002-8873-5671

Source : Cirad - Agritrop (https://agritrop.cirad.fr/575840/)

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