International Journal of Advance Agricultural Research
ISSN: 2053-1265
Vol. 8(1), pp. 1-9, September 2020
doi.org/10.33500/ijaar.2020.08.001



Trichoderma virens - based formulation for the control of Ralstonia solanacearum, the causal agent of tomato bacterial wilt in Côte d'Ivoire

ABO Kouabenan1, AMARI Ler-N’Ogn Dadé Georges Elisée2, N’GUESSAN Aya Carine3*, PAKORA Gilles Alex4, DOUMBOUYA Mohamed3, CAMARA Brahima2 and KONÉ Daouda2,5

1Institut National Polytechnique Félix Houphouët-Boigny (INP-HB), Département de Formation et de Recherche Agriculture et Ressources Animales (DFR-ARA), Laboratoire de Phytopathologie et de Biologie Végétale, BP 1313 Yamoussoukro, Côte-d’Ivoire.
2Laboratoire de Physiologie Végétale, UFR Biosciences, Université Félix Houphouët Boigny, 22 BP 582 Abidjan 22, Côte d’Ivoire.
3Département de Biologie Végétale, UFR Sciences Biologiques, Université Péléforo Gon Coulibaly, BP 1328 Korhogo, Côte d’Ivoire.
4Laboratoire de Pharmacodynamie Biochimique, UFR Biosciences, Université Félix Houphouët-Boigny d’Abidjan (UFHB), 22 BP 582 Abidjan 22, Côte d’Ivoire.
5Centre d’excellence sur les changements climatiques, la biodiversité et l’agriculture durable (CEA-CCBAD).

*To whom correspondence should be addressed. E-mail: carineayanguessan@yahoo.fr.

Received 29 July, 2020; Received in revised form 21 August, 2020; Accepted 24 August, 2020.

Abstract


Keywords:
Biological control, Trichoderma virens, Ralstonia solanacearum, Induced systemic resistance.


The bacterial wilt disease caused by Ralstonia solanacearum is a severe threat to tomato production in Côte d'Ivoire. Genetic resistance is currently the most reliable control method. Unfortunately, it is challenged and overcame by the genetic variability and phenotypic plasticity of the bacterial strains. In this study, a powdery formulation based on Trichoderma virens FTR in-vivo was tested on two strains of R. solanacearum as an alternative control method. 50, 100 and 200 g of the product were applied to 3 kg of sterilized soil before the transplanting of two tomato cultivars (Petomech and Lindo). The product was applied once and twice; the second time was performed prior to bacterial inoculation to the root system. The results showed that the 200 g of the product applied in once and twice was more effective than the other treatments, reducing the disease severity by 71.44 and 92.78%, regardless of bacterial strain and tomato cultivar, respectively. The T. virens-based formulation is, therefore, noteworthy for the biocontrol of R. solanacearum.

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