Frequent utilization of associations among post-emergence herbicides has remained a lot of questions about the selectivity and effectiveness of weeds control in soybean crop. Thus, this study aimed to evaluate the selectivity and effectiveness of herbicides tank mixtures on weed management in Roundup Ready® soybean crop. For this purpose, the following treatments were evaluated: glyphosate (960 g ha-1), glyphosate + Agrus 200® adjuvant (960 + 200 g ha-1), glyphosate+chlorimuron-ethyl (960 +12.5 g ha-1), glyphosate+lactofen (960 + 96 g ha-1) and […]

Aimed in the present work to evaluate the interaction effect between periods of nitrogen coverage fertilization and different formulations of nicosulfuron herbicide over the selectivity to 2B-710 and 30K73 corn hybrids. Two experiments were conducted, simultaneously, with corn seedlings in V3 and V6 stages using treatments disposed in a factorial scheme 2×4+1, where the first factor was composed by two nicosulfuron formulations (18.8 g ha-1) (SansonTM and AccentTM) in mixture with atrazine (1250 g ha-1) and the second factor constituted […]

Aiming to evaluate the yield and productivity of soybean crop in response to burndown time and herbicide application in post-emergence in conventional and transgenic genotypes, the area of Technological Center COMIGO, was used to conduct this study. The experimental design was a randomized complete block in factorial arrangement 2 x 7, adopting eight repetitions. The first factor corresponded to burndown times before seeding, performed 15 and 1 day before sowing (DBS). The second factor was constituted by seven managements postemergent, described […]

On wheat crop there is scarce scientific evidence regarding the use of herbicides, limiting the information about their effects. In this context, the objective of this work was to evaluate some yield components and seed quality of wheat crop under the effect of increasing doses application of metsulfuron- methyl in two stages of development, from the premise that the use of high doses in combination with developmental stage may affect the plant. With this purpose an experiment was conducted in […]

The research aimed to evaluate the effects of insecticides/nematicides interaction, applied at planting groove, and herbicides in pre and post-emergence, in the initial stage of sugarcane crop. The experimental design for pre and post emergency conditions was randomized complete blocks with three replications distributed into split plot, with insecticides located in the plots and herbicides in the splits. Studied inseticides were carbofuran (2100 g ha-1) and aldicarb (1500 g ha-1) and the herbicides in pre emergency conditions were tebuthiuron (1000 […]

With the aim of studying tank mixtures of 2,4-D + picloram and plant growth regulators in Brachiaria brizantha pasture cv. MG-5 an experiment was carried out in field conditions at Rancharia County, São Paulo State, Brazil. The experimental design was constituted by randomized complete blocks with 14 treatments and 4 replications, composed by commercial mixture of 2,4-D + picloram (Tordon™), in dose of 750 g a.i. ha-1 and its tank mixtures with phytoregulators: Ethrel™ (ethephon), Pro-Gibb™ (GA3), Moddus™ (trinexapacethyl) in […]

The frequent use of associations among postemergence herbicides has raised many questions about the selectivity of these for soybean crop. The objective of this work was to evaluate the selectivity of postemergence herbicide associations, and their influence on agronomic aspects, and yield of Msoy 6101® , a soybean cultivar with early cycle. The study was conducted in Motevidiu – GO, during the 2004-2005 crop season. The experimental block design was entirely randomized in split-plot scheme with twofold checks, and four […]

A field experiment was carried out in the Cerrados region in Rondonõpolis, MT, Brazil, in order to evaluate the behavior of2,4-D amine, applied alone and as a pre-site preparation at 72, 144,216,288,432,576 and 720 grams per hectare, to control the weed spectrum in no-till soybean. Commelina benghalensis was the predominant weed species. Soybean was seeded at 1,2,3, 4,5,8 and 10 days after burndown treatment and the planting timing was crossed with 2,4-D rates, applied in a randomized block design in […]