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 […]

An experiment was conducted on a Cerrado oxisol during 1996/97. The objective of experiment was to evaluate the effects of diclosulam and metolochlor alone or in combination, in preemergence control of Sida rhombifolia in soybean. The experimental design was a complete randomized block with four replications. Treatrnents were as follows: diclosulam at 25 and 35 g/ha, diclosulam + metolachlor at 25+1200,25+1800,35+1200 and 35+1800 g/ha, metolachlor at 1200,1800 and 2400 g/ha, and a tank mix of chlorimuron + lactofem at 1.5+96 […]

Lack ofbroadleaf chemical control options in sunflower is a major production problem. An experiment was conducted at Embrapa Soja in Londrina, Paraná State, Brazil, to evaluate broadleafweed control and agronomic efficiency ofpreemergence herbicides applied on clay soil. The treatrnents were: sulfentrazone (350 and 600 g/ha), acetochlor (2100 and 2520 g/ha) and oxyfluorfen (360 and 480 g/ha), weed and hand hoeing treatments. Sulfentrazone applied at 350 g/ha was seletive to sunflower cultivar M 734 and efficient in controlling wild poinsettia tEuphorbia […]

An experiment was carried out with the objective of evaluating the efficiency of selected herbicides in the desiccation of three plant species in Dourados (MS), Brazil, in 1995/96. A randomized block design was used in three plant species: black oat (Avena strigosa ), millet (Pennisetum typhoydes) and Brachiaria plantaginea, with four herbicides in three rates: paraquat (0.30, 0.40 and 0.60 kg/ha), glyphosate (0.72, 1.08 and 1,44 kg/ha), sulfosate (0.96, 1.44 and 1.92 kg/ha) and glyphosate+2,4-D (0.54+0.67, 0.54+1.0 and 0.54+1.34 kg/ha). […]