Bioherbicidal potential of Solanum curtilobum Juz. & Bukasov, a bitter potato from the Andes

Luna-Rodriguez P.; Tejada J.L. · Chilean Journal of Agricultural Research (2025) · DOI: 10.4067/s0718-58392025000500738

Resumen

The Peruvian Andes are home to a rich diversity of native potatoes, including the bitter potato Solanum curtilobum Juz. & Bukasov, characterized by its high levels of glycoalkaloids. This study explores the allelopathic potential of S. curtilobum methanolic extract on the germination and growth of the widespread weed Bidens pilosa L. A germination assay was conducted using different extract concentrations (0, 1, 5, 20, and 50 mL L-1), assessing germination percentage, mean germination time, uncertainty index, and seedling length. Results showed that 20 mL L-1, in contrast to 0, 1 and 5 mL L-1, significantly (P < 0.05) increased mean germination time and reduced seedling length, while 50 mL L-1 completely inhibited germination and reduced significantly uncertainty index in comparison to 0, 1 and 5 mL L-1. Regression analysis confirmed strong dose-dependent effects for germination percentage (R2 = 0.72), mean germination time (R2 = 0.78), and uncertainty index (R2 = 0.77), while seedling length showed a weaker association (R2 = 0.23). The extract’s half maximal inhibitory concentration (IC50) for germination was 24.30 mL L-1. These findings highlight the allelopathic potential of S. curtilobum and its potential use as bioherbicide for sustainable weed management.

Instituciones: Universidad Nacional Agraria La Molina