EVALUATION OF THE EFFICACY OF TWO AROMATIC PLANT EXTRACTS AGAINST PHYTOPATHOGENIC TOMATO FUNGI IN BURKINA FASO | [International Journal of Phytopathology • 2024]

Author(s):

1. Kibsa J. E. Sedego: Joseph KI-ZERBO University, Training and Research Unit of Life and Earth Sciences (UFR-SVT), Biosciences Laboratory, Pathopathology and Tropical Mycology Team, 03 BP 7021 Ouagadougou 03, Burkina Faso

2. Jean C. W. Ouedraogo: University Joseph KI-ZERBO, Training and Research Unit of Exact and Applied Sciences (UFR-SEA), Laboratory of Analytical, Environmental and Bio-Organic Chemistry (LCAEBiO), 03 BP 7021 Ouagadougou 03, Burkina Faso; International Research Laboratory-Environment, CNRST/CNRS/UCAD/UGB/USTTB, Burkina Faso.

3. Elise Sanon: Joseph KI-ZERBO University, Training and Research Unit of Life and Earth Sciences (UFR-SVT), Biosciences Laboratory, Pathopathology and Tropical Mycology Team, 03 BP 7021 Ouagadougou 03, Burkina Faso; International Research Laboratory-Environment, CNRST/CNRS/UCAD/UGB/USTTB, Burkina Faso.

4. Abalo I. Kassankogno: Institute of Environment and Agricultural Research (INERA), Phytopathology Laboratory (Mycology), BP 910 Farako-Bâ, Bobo Dioulasso, Burkina Faso.

5. Kounbo Dabiré: University Thomas SANKARA, University Center of Tenkodogo, 12 BP 417 Ouagadougou 12, Burkina Faso.

6. Philippe Sankara: Joseph KI-ZERBO University, Training and Research Unit of Life and Earth Sciences (UFR-SVT), Biosciences Laboratory, Pathopathology and Tropical Mycology Team, 03 BP 7021 Ouagadougou 03, Burkina Faso

7. Yvonne L. Bonzi-Coulibaly: University Joseph KI-ZERBO, Training and Research Unit of Exact and Applied Sciences (UFR-SEA), Laboratory of Analytical, Environmental and Bio-Organic Chemistry (LCAEBiO), 03 BP 7021 Ouagadougou 03, Burkina Faso.

Abstract:

Tomato production is faced with many fungal diseases including alternariosis and anthracnose caused by Alternaria solani and Colletotrichum sp. respectively, which cause major losses in production. Identify effective biofungicidal formulations based on extracts of Eucalyptus camaldulensis Dehnh. and Cymbopogon citratus (DC.) Stapf on the radial growth of Alternaria solani and Colletotrichum sp. The efficacy of aqueous or ethanolic extracts of Eucalyptus camaldulensis or Cymbopogon citratus as well as combinations of aqueous extracts (4/1; 3/1 and 2/1) on the radial growth and sporulation of Alternaria solani and Colletotrichum sp. was studied in vitro. Then incubated at 25°C under an alternating 12/12 cycle of near ultra-violet light and darkness. The inhibition rate was measured on days 2, 4 and 7 after incubation (DAI) and for sporulation on day 14. All the extracts of the two plants, aqueous or ethanolic, showed the maximum inhibition rate (100%) on the radial growth of Alternaria solani and Colletotrichum sp. at concentrations of 20% and 30%. On the other hand, the combination of aqueous extracts was only effective at the 30% dose with inhibition rates of 49% on Alternaria solani and 21% on Colletotrichum sp. At doses of 20% and 30%, aqueous or ethanolic extracts of Eucalyptus camaldulensis or Cymbopogon citratus completely inhibit the mycelial growth of Alternaria solani and Colletotrichum sp.

Page(s): 55-64

DOI: 10.33687/phytopath.013.01.4682

Published: Journal: International Journal of Phytopathology, Volume: 13, Issue: 1, Year: 2024

Keywords:

Alternia solani Biofungicides Colletotrichum sp , Plant extracts Tomato

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