Revista Brasileira De Herbicidas 2002; 3(2-3): 109-116
Mixtures oftlumioxazin with glyphosate and sulfosate for weed management in citrus
To evaluate the efficacy of flumioxazin mixtures with glyphosate and sulfosate used in handling postemergence in citros, an experiment was conducted in Presidente Castelo Branco, PR, in a 3 year old orange orchard, “Pear” variety. The experimental design was randomized blocks with seventeen treatments and four replicates. The evaluated treatments were: flumioxazin (10, 15,20 and 25 g/ha), flumioxazin + glyphosate (l0+960, 15+960, 20+960, 20+ 1920 and 25+960 glha), flurnioxazin + sulfosate (10+960, 15+960, 20+960, 20+ 1920 and 25+960 g/ha), glyphosate (960 g/ha), sulfosate (960 glha) and check without weed control. The products were sprayed under the crop plants. The weeds present in the area were: Sida rhombifolia (up to 60 em high), Bidens pilosa (up to 50 em high), Richardia brasiliensis (flowering), Digitaria horizontalis (up to 3 tillers) and Brachiaria decumbens (up to 20 tillers). The flumioxazin mixtures with glyphosate and sulfosate, starting from rate of 10+960 g/ha, were efficient in the control of the weeds. The glyphosate and sulfosate alone were efficient in the control of the present species, no significant differences being observed between mixtures starting from 7 days after application (7 DAA). The flumioxazin alone did not provi de adequate control ofthe weeds, but when in mixture with glyphosate and sulfosate presented faster control effect, observed at 3 DAA. For B. decumbens, glyphosate or sulfosate up to 1920 g/ha in mixture with flumioxazin at 20 g/ha provided longer weed control, with few tillers. No chemical treatment visable injured the orange crop.
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