Glyphosate is the main herbicide in weed control in soybean. However, phytotoxicity symptoms after application of this herbicide are reported in RR soybean. In this context, biostimulants can potentiate the metabolic activities of the plant in function of the bioregulators, amino acids and nutrients present in its formulation, becoming an alternative to minimize the phytotoxic effects of glyphosate. Thus, the objective of this work was to identify the use of biostimulants, derived from Ascophyllum nodosum, associated to the herbicide glyphosate […]

The control of weeds in melon crops is hampered by the lack of selective herbicide information for the crop. The objective of this work was to evaluate the effect of post-emergence herbicide application on yellow melon and toad skin culture. Two experiments (one for each cultivar) were carried out in a completely randomized design with four replications. The treatments were composed by the application of the herbicides in post-emergence: fomesafen (250 g a.i. ha-1); flumioxazin (2000 g a.i. ha-1); fenoxaprop […]

The specie Cyperus rotundus is among the weeds most difficult to control and can cause high losses in the sugarcane crop. The practices adopted in the culture guarantee the values of yield, among them, is the weed management. The objective of this work was to evaluate the initial growth of sugarcane pre-sprouted seedlings submitted to herbicide application before or after planting. Two experiments (pre and post-planting) were conducted in greenhouse, in a completely randomized design, with four replications. The treatments […]

Paspalum virgatum L. is a grass weed common in pasture and has difficult control, mainly due to its similarity to forage. Conventional techniques such as grazing and replanting of pasture have been unsatisfactory in the control of this weed. The objective of this work was to evaluate the control of the razor-blade grass (P. virgatum L.) at the pre-emergence atrazine, by means of a dose‑response curve and the selectivity of this herbicide in the pastures of Brachiaria brizantha cv. Marandu […]

In order to increase the efficiency of the use of cover crops, it is important to know which species present the greatest suppression of weeds and if the cover crop management method affects the suppression effect. The goal, with this work, was to evaluate the suppressive effect of different winter cover crops and their different managements through the use of phytosociological indices. The experimental design used was of randomized blocks conducted in a 4 × 3 factorial scheme with four […]

Several environmental conditions may directly interferes with the effectiveness of herbicides weed control, therefore, the aim of this research was to evaluate the best climate moment to initiate chemical horseweed (Conyza spp.) control; as well as to evaluate the level of glyphosate tolerance on horseweed population. These trials were conducted in Indianópolis region, Minas Gerais State. The experiment 1 was designed as factorial (2×5) with first factor being the weather period conditions, dry or wet, comparison at first application time […]

Weeds that are not well managed can cause losses of more than 90% in the final production of the crops, and for cowpea there is a certain difficulty to control them, since there are no herbicides registered for the crop. The objective of this study was to evaluate the initial tolerance of cowpea to herbicide application in pre-emergence of the crop. The experiment was conducted in a greenhouse, in a completely randomized design, with three replications. The treatments evaluated were […]