Abstract

ALCIVAR-RODRIGUEZ, Carlos et al. Commercial fungicides for controlling peanut leaf spot (Nothopassalora personata) Manabí, Ecuador. RIIARn [online]. 2025, vol.12, n.2, pp.84-89. ISSN 2409-1618.  https://doi.org/10.53287/fosr5372kk49z.

The peanut leaf spot, caused by Nothopassalora personata is a disease that significantly limits the production of peanut crops, for this reason, the objective of this research was to evaluate the effect of fungicides in the control of peanut leaf spots. The experiment was carried out at the experimental campus of the Escuela Superior Politécnica Agropecuaria de Manabí Manuel Félix López located in Calceta, Manabí, Ecuador. The following treatments were tested in a single application: T1: Carbendazim (3 mL L-1), T2: Trifloxystrobin + Tebuconazole (3 mL L-1), T3: Copper sulfate pentahydrate (3 mL L-1), T4: Difenoconazole (2 mL L-1), T5: Chlorothalonil (3 mL L-1), T6: Azoxystrobin + Tridemorph (3 mL L-1), T7: Control. The application was carried out at 80 DAS, and evaluations were made 15 and 30 days before application, and 8 and 15 days after application, considering its incidence (% of leaflets affected) and total severity (% of leaf area affected). Variables such as plant height, number of branches, severity and incidence of peanut leaf spots, pods/plant, 100-kernel weight (g), total weight of peanuts in pods (q ha-1), and total kernel weight (q ha-1) were recorded. Data were analyzed using ANOVA; means were separated using the Tukey test (α = 0.05). In the analysis of variance, the treatments, including the control, did not significantly influence disease severity or productivity. In conclusion, it has been shown that a single application of fungicides is not sufficient to control peanut leaf spot, so a greater number of fungicide applications should probably be made.

Keywords : fungicide; peanut leaf spot; severity; crop yield.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )