This research aimed to evaluate the effects of vinasse, flegmass and fusel oil (distillery by-products) on the germination of Sida rhombifolia and Brachiaria decumbens seeds, under laboratory conditions. By-product concentrations (12.5; 25.0; 50.0 and 100.0% v/v) and the controls (water with pH and osmolality amended according to by-product composition and levels) were applied directly on plastic boxes filled with 100 seeds of the same species. The experiment was arranged in a randomized complete design and the data were submitted to the Tukey test. Sida rhombifolia seeds submitted to fusel oil did not germinate, reducing seed viability mainly at the largest application rates. Brachiaria decumbens seeds submitted to the highest flegmass rate tended to reduce seed viability and germination speed index (GSI). Brachiaria decumbens seeds submitted to fusel oil did not germinate and were rendered totally unviable.
by-products; weeds
