In vivo assessment of fungicides and oils against macrophominaphaseolina and fusarium equiseti

Fusarium equiseti and Macrophominaphaseolina 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 alternative in the fight against these pathogens. Isolates of Fusarium equisedi and Macrophominaphaseolina were used to inoculate soybean seedlings of the G196 variety. The experimental set-up 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 Cymbopogon citratus, Lippia multiflora and Azarachdica indica were applied every fortnight. The results showed that all infected plants showed disease symptoms with low and medium-low severity levels on plants treated with fungicides and essential oils compared with the untreated control (severity: 9). Treatments based on Cymbopogon citrates oil (5.66-1.16) and Lippia multiflora (7-1) recorded the lowest scores for average severity on Fusarium equiseti. Mancozeb (6.5-1.5) obtained the lowest mean severity scores on Macrophominaphaseolina. Mancozeb and Cymbopogon citrates were very 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 equiseti and Macrophominaphaseolina on soybean under real conditions.