The aim of this work was to characterize the onset of weed interference in two soybean cultivars, with different growth cycle, under two conditions of corn plants infestation. The experimental design was split plot design composed by two factors: periods of coexistence of soybean with corn (no coexistence, coexistence during 14, 28 and 42 days after sowing (DAS) and throughout the soybean cycle) and  two corn densities: 10 plants m-2 and 30 plants m-2. The cultivar Fundacep 63RR had its […]

The high frequency of M. aegyptia in sugarcane harvested mechanically is related to its adapting behavior to this harvesting system, what resulted in an increased the infestation potential of this species in relation to other weeds. The aim of this study was to evaluate the management M. aegyptia by spraying pre-emergence herbicides, in the presence and absence of straw in clay soil, under different rainfall simulation. Two experiments were carried out in a completely randomized design with four replications. In […]

The aim of this study was to evaluate the initial growth of cassava plants after post-emergence application of herbicides. The experiment was carried out in greenhouse, with randomized block design and four replications. Treatments consisted in the application of herbicides 25 days after crop emergence. The herbicides applied were bentazon, clomazone, fomesafen, fluazifop-p-buthyl, glyphosate, nicosulfuron, chlorimuron-ehtyl, sulfentrazone and the fluazifop-p-buthyl + fomesafen, and a treatment without herbicide application. The visual intoxication of cassava plants was evaluated at 7, 14, 21 […]

Ryegrass is the main weed that infests barley, causing high yield losses and quality of grain. Thus, this work intended to evaluate the selectivity and efficacy of herbicides for weed control in barley. For such, we carried out an experiment in the field with randomized block design in factorial scheme 2 x 12, with four replications. Factor A is composed by the barley genotypes MN610 and Criola and factor B by herbicides: iodosulfuron imazethapyr + imazapic; clomazone; propanil; oxyfluorfen; metsulfuron-methyl; […]

The emergence of soybean seeds in fields during the common bean cultivation can negatively affect the growth and yield of this crop. This problem can be minimized with the use of selective herbicides to common bean but non-selective to soybean. Aiming to define management strategies to voluntary soybean plants in the common beans crop, this research was carried out to evaluate the selectivity of ethoxysulfuron to soybean and common beans crops. Two experiments were conducted in a greenhouse, in randomized […]

The selectivity of pre-emergence herbicides depend of the soil characteristics. In this context, the aim of this works was evaluated the fomesafen selectivity to cotton crop in soil with contrasting textural class. The experiment was performed under greenhouse conditions in completely randomized design, with five replications. The treatments were organized in factorial arrangement 5 x 2, with the first level representing five doses of fomesafen (0, 175, 350, 525 e 700 g ha-1) and the second factor two soils with […]

The objective of this work was to evaluate the effects of herbicides applied in post-emergence of Arabic coffee plants inoculated and non-inoculated with arbuscular mycorrhizal fungi. The experiment was conducted in a factorial arrangement 2 x 6, being seedlings of Arabic coffee (Catuaí IAC 99 cv) inoculated and non-inoculated with mycorrhizal fungi (Factor 1), and five herbicides (chlorimuron-ethyl, oxyfluorfen, fluazifop-p-butil, fomesafen, [fluazifop-p-butil + fomesafen]) and a control treatment (Factor 2), with four replications. The seedlings inoculated with mycorrhizal fungi (Rhizophagus […]

Brachiaria ruziziensis can contribute to the consolidation of the no-tillage system due to high production of biomass that can be used in integrated management of weeds. However, there is little information regarding the desiccation of this forage, particularly with the use of contact action herbicides. The present work aimed to evaluate the different management methods of desiccation of B. ruziziensis, and the effect in second season maize crop and weed suppression. The experimental design was a randomized complete block design […]

The study aimed to evaluate the efficiency and the quality of technology application of the tank mixture of glyphosate + carfentrazone-ethyl in Commelina diffusa control. The experiment was conducted in plastic greenhouse and the experimental units were represented by vessels with four plants of C. diffusa. The experimental design was the entirely randomized, with nine treatments in a factorial scheme (4×2)+1, being four spray nozzles, (XR11002; DG11002; TT11002 and AI11002), two spray solutions of glyphosate + carfentrazone-ethy at 480 + […]

With the release of genetically modified organisms for tolerance of the non-selective herbicide ammonium-glufosinate in Brazil, along with its importance as an alternative herbicide to glyphosate-resistant weed, the knowledge of certain aspects related to its mode of action, chemical features and rational management become necessary. In this context, the present literature review was idealized in an attempt to cover, in the light of the current knowledge, some concepts about the biochemistry related to the mode of action of this herbicide, […]