Revista Brasileira De Herbicidas 2000; 1(1): 27-32
Effects of desiccants aplication on the production and quality of soybean seeds in Uberlândia-MG, Brazil
DOI: 10.7824/rbh.v1i1.311
Field and laboratory experiments were used to test the effect of selected desiccants on the productivity and quality of soybean seeds, Savana cultivar. ln the field ten treatrnents were arranged in a randomized complete block design, with four replications. Treatrnents were: (1) control (harvested during physiological maturation), (2) glyphosate-360 (0.36 kg/ha), (3) glyphosate-360 (0.72 kg/ha), (4) glyphosate-720 (0.36 kg/ha), (5) glyphosate-720 (0.72 kg/ha), (6) glyphosate-480 (0.36 kg/ha), (7) glyphosate-480 (0.72 kg/ha), (8) paraquat (0.30 kg/ha), (9) diquat (0.30 kg/ha), and (10) control (harvested during normal harvesting time). The treatrnents were evaluated for productivity, weight of 1000 seeds, mechanical damage ofthe integument, germination, vigor (natural aging) and field germination. Desiccants, at all rates, did not affect productivity and germination of soybean seeds. Seeds originated from plants desiccated by contact herbicides showed best vigor than those desiccated by sistemic herbicides. The desiccants did not improve seed quality, but their utilization could avoid, in adverse climate conditions, seed deterioration in the field, since the harvesting is antecipated in six days.
64