Padrão de germinação de sementes de capim-llanero em função do tratamento com metcamifen ou fluxofenim

Abstract

Llanero grass (Urochloa humidicola) (syn. Brachiaria) is a pasture forage that is currently gaining great relevance due to its great soil and climate adaptability and high nutritional values. In view of the above, the objective of this research was to evaluate the germination pattern of llanero grass (U. humidicola) depending on different doses of the seed protectors metcamifen or fluxfenim. The experiment was carried out in the laboratory, with four replications of 50 seeds in eleven treatments, respectively: seeds without any type of coating (control); application of fluxfenin through the commercial product Benefic in 20 doses; 40; 80; 160 and 320 mL, and application of metcamifen through the commercial product Epivio C in doses 20; 40; 80; 160 and 320 mL. The effect of the different doses was evaluated by germination, relative frequency of germination, initial, medium and final time of germination, germination synchrony and the germination speed index over the 23 days that germination lasted. The highest rates of germinated seeds, relative frequency and synchrony of germination were obtained in the condition in which the seeds received treatment with 40 mL of Epivio C. The lowest rate of germinated seeds was obtained in the condition in which the seeds received treatment with 320 mL of Epivio C.