This study investigated the residual activity of different rates of the herbicides alachlor, oxyfluorfen, prometryne and S-metolachlor applied in pre-emergence in soils of contrasting textures. For that, eight simultaneous experiments were conducted with samples of PSAMENT (sandy texture) and RED LATOSOL (clay texture), which received alachlor (0; 2.40 and 3.36 kg ha-1), oxyfluorfen (0; 0.48 and 0.72 kg ha-1), prometryne (0; 0.75 and 1.50 kg ha-1) and S-metolachlor (0; 1.20 and 1.44 kg ha-1) applications. The treatments monitoring was made […]

Using bioindicator species is really common in studies concerning herbicides behavior in soil. Trifloxysulfuron-sodium and pyrithiobac-sodium are herbicides recommended for post-emergence weed control in cotton crop and present potential carryover to rotational crops. The research aimed to evaluate the susceptibility of vegetal species to doses of trifloxysulfuron-sodium and pyrithiobac-sodium herbicides looking forward to selecting plants that may be used in monitoring low concentrations of these herbicides in soil. Two experiments were simultaneous carried out, in randomized entirely design, disposed in […]

– This research aimed to evaluate the 2.4-D residual activity over soybean emergence in soils with distinct textures. The experiments, each one with a distinct soil type (clay sand and clay), were conducted in greenhouse conditions, in a randomized entirely design, in factorial scheme 6×2+1 with treatments constituted by the combination of six application period: 0, 3, 5, 7, 10 and 14 days before soybean sown (DBS) and two 2.4-D (502.5 e 1,005 g e.a. ha-1) doses, besides an absolute check […]

The work was developed with the objective of evaluating the carry over effect in soil of nicosulfuron herbicide isolated and nicosulfuron + atrazine over soybean, bean, cotton, cucumber, sunflower and rice crops, sown in different periods after herbicides application. The experiment was carried out from November/2008 to April/2009, at FEP-UNESP, in Selviria, County/MS, with clayey soil. The experiment was conducted under conventional tillage with crops sown in 0.5 cm spacing. The experimental design was randomized complete block with 13 treatments […]

Flazasulfuron is recommended for sugarcane and flumioxazin for soybean and other leguminous crops in Brazil. Due to the importance of these crops the herbicides may be widely used and there is a need to know their behavior in the cultivated soils. In order to study the leaching of these compounds, an experiment was carried out in greenhouse with two soils: a sandy loam Typic Hapludox (LVd) with 22 g dm-3 of organic matter and a clay Rhodic Eutrudox (LRe) with […]