Susceptibility of Mycosphaerella fijiensis to Mefentrifluconazole in Industrial Banana Plantations in Côte d'Ivoire : An In vitro Study
YAO Kouadio Jacques Edouard *
Laboratoire d'Amélioration de la Production Agricole, Faculty of Agroforestry, University Jean Lorougnon Guédé, Daloa, BP 150 Dalao, Côte d'Ivoire.
N’GUESSAN Patrick Henri
Plant Physiology and Pathology Teaching and Research Unit, University of Félix HOUPHOUËT - BOIGNY, 22 BP 582 Abidjan 22, Côte d'Ivoire.
TUO Seydou
Plant Physiology and Pathology Teaching and Research Unit, University of Félix HOUPHOUËT - BOIGNY, 22 BP 582 Abidjan 22, Côte d'Ivoire.
GUINAGUI N’Doua Bertrand
Plant Physiology and Pathology Teaching and Research Unit, University of Félix HOUPHOUËT - BOIGNY, 22 BP 582 Abidjan 22, Côte d'Ivoire.
CAMARA Brahima
Plant Physiology and Pathology Teaching and Research Unit, University of Félix HOUPHOUËT - BOIGNY, 22 BP 582 Abidjan 22, Côte d'Ivoire.
KASSI Koffi Fernand Jean-Martial
Plant Physiology and Pathology Teaching and Research Unit, University of Félix HOUPHOUËT - BOIGNY, 22 BP 582 Abidjan 22, Côte d'Ivoire.
KONE Daouda
Plant Physiology and Pathology Teaching and Research Unit, University of Félix HOUPHOUËT - BOIGNY, 22 BP 582 Abidjan 22, Côte d'Ivoire.
*Author to whom correspondence should be addressed.
Abstract
Banana Sigatoka, caused by Mycosphaerella fijiensis, severely impacts banana production in Côte d'Ivoire. This study evaluates the susceptibility of M. fijiensis isolates to mefentrifluconazole, a new triazole fungicide, compared to difenoconazole. In vitro tests on 17 isolates from industrial plantations revealed IC50 values ranging from 0.005 to 0.073 mg/L (average 0.037 mg/L), indicating high sensitivity. Growth inhibition rates were higher for mefentrifluconazole, demonstrating its superior efficacy. These results suggest mefentrifluconazole as a promising alternative for managing black spot and mitigating resistance development.
Keywords: Black spot, banana, mycosphaerella fijiensis, mefentrifluconazole, Côte d’Ivoire