Gesieli Priscila Buba, Clovis Arruda Souza, Camila Cigel, Franciele Fatima Fernandes and Eliton Fachin Cardoso
Santa Catarina State University, Department of Agronomy, Laboratory of Crop Plants, Postgraduate Program in Plant Production, 88520-000 Lages, Santa Catarina, Brazil
Buba, G. P., Souza, C. A., Cigel, C., Fernandes, F. F. & Cardoso, E. F. (2026). Selectivity of mesotrione and tembotrione to white oat cultivars. Bulg. J. Agric. Sci., 32(2), 378–390
Owing to increased production of oats, research on crop management is needed, especially for weed control. This work aimed to evaluate the selectivity of herbicides mesotrione and tembotrione to white oat. The experiment was conducted in the field (2019 and 2020) in a randomized block split-split plot design. The main plot contains cultivars FAEM-007, IPR-Afrodite, UPFA-Fuerza and URS-Monarca; the split plot, herbicides mesotrione and tembotrione; and the split-split plot, the following doses: mesotrione (0; 42; 84; 168 and 336 g a.i. ha-1) and tembotrione (0; 22.05; 44.1; 88.2 and 176.4 g a.i. ha-1). Yield was reduced by 12.8% (2019) and 6.0% (2020) and industrial yield by 14.5% (2019) and 6.0% (2020) after application of the 336 g of mesotrione, regardless of cultivar. Ther herbicides tembotrione (doses ≤176.4 g a.i. ha-1) and mesotrione (doses ≤168 g a.i. ha-1) are selective for white oat.