Vanessa Caetano de Castro Passos
Abstract:
Narrow-leaf weed control is still a major challenge for ranchers, mainly because there are no herbicides to control grassy weeds on pasture. A possible solution to this problem would be to renew the pasture and use some product that provides protection against the action of graminicide herbicides at the time of forage sowing, called safeners. The objective of this study was to evaluate the possibility of using the dietholate protector for seed treatment in Brachiaria brizantha (Hochst.) Stapf., Brachiaria humidicola (Rendle.) Schweickerdt, Brachiaria ruziziensis (R. Germ & Evrard) Panicum maximum Jacq cv. Mombasa and Panicum maximum Jacq cv. Massai two experiments were carried out, the first being conducted at the Seed Laboratory of the Federal University of Goiás, Jataí Regional, evaluating the effect of dietholate protector on seed germination parameters of the evaluated species. And the second experiment was conducted in Barra do Garças municipality, at the experimental farm of the Federal University of Mato Grosso, where the use of dietholate as a protector of the herbicide Clomazone was evaluated. Dietholate provided a protective effect at doses up to 1200 mL of dietholate 100 kg -1 seed for Brachiaria brizantha cv. Marandú, Brachiaria humidicola and Brachiaria ruziziensis. However, doses above 800 mL dietholate 100 kg seeds-1 affected the seed germination parameters of Panicum maximum cv. Mombasa and Panicum maximum cv Massai. Although seed protection was observed, the doses of dietholate used were insufficient to prevent the deleterious effects of clomazone herbicide.
