Revista Brasileira De Herbicidas 2009; 8(2): 44-53
Viability of the tubers of purple nutsedge (Cyperus rotundus L.) treated with sulfentrazone and flazasulfuron
DOI: 10.7824/rbh.v8i2.67
The use of herbicides for weed control have improved in the last years, mainly for the control of purple nutsedge (Cyperus rotundus L.) and other perennial weeds. In order to study the control of purple nutsedge, sulfentrazone and flazasulfuron isolated and in mixture, were applied in field conditions with high infestation of this species and repeated on the second year. The variable analysed were viability of the tubers of C. rotundus at 90 and 300 DAT in 2004 and at 90 and 270 DAT in 2005, collected in the arable layer (25x25x25cm), and taken to a greenhouse where they were planted. Evaluation of the percentage of germination was done at 20 days after the planting of the tubers of C. rotundus. The results showed that the herbicides provided significant reductions of the tubers viability of purple nutsedge. Best control was achieved with flazasulfuron at 50 g.ha-1 and flazasulfuron at 50 + 50 g.ha-1 in sequential applications.
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