Three experiments were developed with the goal to evaluate the susceptibility of Merremia cissoides, Neonotonia wightii and Stizolobium aterrimum to the amicarbazone, imazapic and sulfentrazone herbicides, by means of rate-response curves. The experiments were installed in clay soil, where eight doses of each herbicide were applied, in pre-emergency. The used doses were: 8D, 4D, 2D, D, 1/2D, 1/4D, 1/8D, and check plots without application; whereas D is the recommended dose of amicarbazone (1200 g ha-1), imazapic (147 g ha-1) or […]

The association of glyphosate and diclosulam in burndown can reduce the presence of weeds for a longer period, thus promoting the development and productivity of soybean plants. The objective was verify if the efficiency of the herbicide diclosulam associated with glyphosate, in burndown for direct seeding, in the seed bank of weeds in soybean grown in the plant system and apply. The straw present was Urochloa ruziziensis at 4.4 t ha-1 of dry mass, uniformly distributed over the experimental area. […]

This study aimed at evaluating the effective rates of saflufenacil and adjuvants for controlling Sagittaria montevidensis (sagitaria) populations resistant to ALS and photosystem II (PS II) inhibitor herbicides, and phytotoxicity to the Epagri 108 rice cultivar. Two biotypes of sagitaria (SAGMO) were tested: SAGMO 10 – with cross resistance to ALS inhibitor herbicides, and SAGMO 32 – with multiple resistance to ALS and PSII inhibitor herbicides. Treatments consisted of three different saflufenacil rates: 75; 112.5 and 150 g a.i. ha-1 […]

The sourgrass is a difficult plant to control, because the vegetative survival characteristics and mainly because the glyphosate resistance. The aim of this study was to evaluate the efficacy of grass herbicides to control the perennial sourgrass in full flowering growth stage. It were installed two field experiments, in the first experiment, it was tested 4 graminicides in a single application and rate the percentage of control at 14 and 28 DAA. In the second experiment, it was applied 17 […]

The use of herbicides is essential for the control of weeds and increase crop productivity, but these products can affect the physiology and growth of non-target organisms, including native plants. The objective of this research was to evaluate in the heated greenhouse the gas exchange, fluorescence of chlorophyll a and chloroplastid pigment content of pequi plants (Caryocar brasiliense) submitted to simulated drift of glyphosate. The treatments were arranged in a randomized block. Seven doses of glyphosate were tested: 0 (control), […]

The goal of this work was to evaluate the sulfentrazone effects on the characteristics associated with photosynthetic activity of Helianthus annus, Canavalia ensiformis, Dolichos lab lab and Arachis hypogaea regarded species with potential of remediation of contaminated soil with this herbicide. The experiment was conducted in factorial 4 x 3, completely randomized design, with four replications. The first factor consisted by cultivation of species H. annus, C. ensiformis, D. lab lab and A. hypogaea; the second factor by three sulfentrazone […]

With the increase in the demand for renewable fuels, the sugarcane industry must seek a way of increasing agro-industrial productivity while reducing production costs. Currently, there are few reports on the use of plant growth regulators in saccharine sorghum crops. The objective of this study was to evaluate the effects of the application of chemical ripening agents on the technological quality and the morphological and anatomical aspects of saccharine sorghum. The experiment was conducted at the Cerradinho Mill in Catanduva, […]

The cultivation of beets is frequently done in a crop rotation system with cereals such as corn. In this case, herbicides with residual effect applied during corn growth can harm the establishment and growth of beets grown in succession. Therefore, three experiments were carried out in a greenhouse to evaluate the residual effect of atrazine and tembotrione, in isolation or in a mixture, on the initial growth of beets. The treatments consisted of six dosages corresponding to 0, 10, 20, […]

Glyphosate is an agricultural pesticide of great importance in the world. In this sense, several studies have been developed in order to select adjuvants which elevate the efficacy of the product. Two experiments were performed with the goal to evaluate the efficacy of the glyphosate herbicide when associated to different experimental prototypes of agricultural adjuvants, elaborated from non-purified residue ofbiodiesel production. Gross residue from the biodiesel production was used, as well as its dilution in water, and addition of ammonium […]