Weed herbicide resistance is a phenomenon defined as ability of a biotype survives to herbicide sprayed, at a recommended rate that control a susceptible population. This research had the objective of determine, the level of resistance the herbicides of the Bidens subalternans. The herbicides treatments they were with bentazon, fomesafen, imazethapyr e chloransulam-methyl. Sprayed in post-emergency, when B. subalternans reached stage four-leaf pairs. The herbicide rates sprayed was crescents in a logarithm scale of 0,0; 0,001; 0,01; 0,1; 1,0; 10 […]

It was evaluate the efficacy of the herbicide flumioxazin, applied isolated and in mixture with glyphosate, in orange orchard, for control of Panicum maximum, Cenchrus echinatus, Digitaria horizontalis, Alternanthera tenella, Bidens pilosa, Malvastrum coromandelianum, Commelina benghalensis, Amaranthus spinosus and Ageratum conyzoides. The treatments were: 0.025 and 0.05 kg ha-1 of flumioxazin (plus mineral oil 0.5%); 0.025 kg ha-1 of flumioxazin plus 1,08 kg e.a. ha-1 of glyphosate (plus mineral oil 0.5%); 0.025 kg ha-1 of flumioxazin plus 1.44 kg e.a. […]

In order to study the influence of the herbicides diclosulam and flumetsulam on soybean IAC-19 growth and nodulation, an experiment was carried out in pots, in greenhouse, using sandy-loam and clay soils. The seeds were inoculated with Bradyrhizobium japonicum. The treatments were: no herbicide and no innoculation, no herbicide with innoculation, diclosulam at 16,8, 33,6 and 50,4 g/ha; flumetsulam at 60, 120 and 180 g/ha, applied in pre-emergence, all innoculated. Nodulation was evaluated at 41 days after treatment (DAT). Plants […]