Revista Brasileira De Herbicidas 2015; 14(2): 141-147
Herbicides efficacy applied in pre-emergency to control Digitaria insularis in bean
Aimed to evaluate the herbicide efficiency applied pre-emergence for Digitaria insularis when glyphosate resistant control in bean crop. The experimental design was a randomized complete block design with four replications. Treatments consisted of seven different managements of D. insularis: weeded witness, witness without weeding, s-metolachlor (1.440 g ha-1 a.i.), clomazone (648 g ha-1 a.i.), imazethapyr (106 g ha-1 a.i.), flumioxazin (50 g ha -1 a.i.), imazethapyr + flumioxazin (106 + 50 g ha -1 a.i.). D. insularis were seeds sown a haul in the entire area at the rate of 300 seeds m-2. Two days after the sowing of D. insularis there was an application of herbicides. An hour before the application of pre-emergency herbicides there was an application of 1,440 g ha-1 of glyphosate, except as witnesses due to reinfestation of weeds. The cultivar BRS-Style beans were sown four days after the installation of the experiment. It evaluated Percentage of control and phytotoxicity and productivity of bean culture. The s-metolachlor and imazethapyr + flumioxazin herbicides were efficient control D. insularis and selective of the bean crop. The bean crop was increased productivity and similar to witness weeded with treatments s-metolachlor, imazethapyr and imazethapyr + flumioxazin.
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