In vivo assessment of fungicides and oils against Macrophomina phaseolina and Fusarium equiseti

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Résumé

Fusarium Fusarium equiseti and Macrophomina phaseolinaare major fungal agents associated with soya. are major fungal agents associated with soya. In response to the use of synthetic pesticides and their corollaries, the use of essential oils is an response to the use of synthetic pesticides and their corollaries, the use of essential oils is an response to the use of synthetic pesticides and their corollaries, the use of essential oils is an alternative in the fight against these pathogens. Isolates of alternative in the fight against these pathogens. Isolates of Fusarium equiseti Fusarium equiseti and Macrophomina phaseolina phaseolina were used to inoculate soybean seedlings of the G196 variety. The experimental set the G196 variety. The experimental set-up used was a factorial block with five modalities and three levels (doses) repeated 3 times. After used was a factorial block with five modalities and three levels (doses) repeated 3 times. After used was a factorial block with five modalities and three levels (doses) repeated 3 times. After inoculation, foliar sprays containing copper hydroxide, mancozeb, essential oils of inoculation, foliar sprays containing copper hydroxide, mancozeb, essential oils of inoculation, foliar sprays containing copper hydroxide, mancozeb, essential oils of Cymbopogon citratus citratus, Lippia multiflora and Azarachdica indica were applied every fortnight. The results showed applied every fortnight. The results showed that all infected plants that all infected plants showed disease symptoms with low and medium with low and medium-low severity levels on plants treated with fungicides and essential oils compared with the untreated control treated with fungicides and essential oils compared with the untreated control treated with fungicides and essential oils compared with the untreated control (severity: 9). Treatments based on Treatments based on Cymbopogon citratusoil (5.66-1.16) and Lippia multiflora Lippia multiflora (7-1) recorded the lowest scores for average severity on lowest scores for average severity on Fusarium equiseti. Mancozeb (6.5 Mancozeb (6.5-1.5) obtained the lowest mean severity scores on mean severity scores on Macrophomina phaseolina. Mancozeb and Mancozeb and Cymbopogon citratus were very effective as curative treatments at lower doses. Based on these results, effective as curative treatments at lower doses. Based on these results, effective as curative treatments at lower doses. Based on these results, Cymbopogon citratus, Lippia multiflora, and mancozeb could be considered effective active ingredients for controlling Fusarium multiflora, and mancozeb could be considered effective active ingredients for controlling Fusarium multiflora, and mancozeb could be considered effective active ingredients for controlling Fusarium equiseti equiseti and Macrophomina phaseolina on soybean under real conditions under real conditions.

Mots-clés

Glycine max L., Essential Oils, Fungicides.