Chemical management of aquatic macrophytes under simulated floodplain condition in mesocosms.

Floating natives ( and ) and emergent exotic invasives ( and ) macrophytes grow as aquatic weeds in both natural and artificial floodplain areas in Brazil, where the chemical control should be researched. The herbicides glyphosate and saflufenacil, alone or mixed, were tested for weed control under simulated floodplain condition in mesocosms. Glyphosate (1,440 g ha), saflufenacil (120 g ha), or glyphosate (1,440 g ha) + saflufenacil (42, 84, and 168 g ha) were applied firstly; and 75 days after treatment (DAT), glyphosate (1,680 g ha) was applied as a follow-up treatment to control plant regrowth.

Control of with imazamox and analysis of environmental indicators in microcosms.

The aim of this study was to assess the efficacy of imazamox for control of and to assess the effects of plant decomposition on environmental indicators after application of this herbicide in microcosm conditions. The following rates were used: 600, 700, 800 and 900 g ai ha and spray volume 50 L ha. Control efficacy was determined as the percentage (from 0 to 100%) of visible injury symptoms in the plants, biochemical and chemical oxygen demand (BOD and COD), water quality variables, chlorophyll and pheophytin at 0, 7, 15, 30, 45 and 60 days after application (DAA) and fresh and dry biomass at 60 DAA.

Electrostatic spraying of imazamox to control the floating aquatic plant and its effects on environmental indicators of water quality.

This study aimed to assess, in a microcosm condition, the efficacy of electrostatic spraying of herbicide imazamox in the control of and the effects of decomposition of plant material on water quality. The herbicide rates used were 600, 700, 800, and 900 g ai ha and spray volume of 50 L ha in electrostatic application. Control effectiveness was assessed at 7, 15, 30, 45, and 60 days after application (DAA), expressed in percentage (0-100%) of visible injury symptoms in the plants, biochemical oxygen demand (BOD), chemical oxygen demand (COD), chlorophyll and pheophytin contents at 0, 7, 15, 30, 45, and 60 DAA, and fresh and dry biomass at 60 DAA.

Detection of anti-cancer drugs and metabolites in the effluents from a large Brazilian cancer hospital and an evaluation of ecotoxicology.

The use of chemotherapy agents has been growing worldwide, due to the increase number of cancer cases. In several countries, mainly in Europe countries, these drugs have been detected in hospitals and municipal wastewaters. In Brazil this issue is poorly explored.

Teflubenzuron as a tool for control of trichodinids in freshwater fish: Acute toxicity and in vivo efficacy.

In this study we describe the anti-Trichodina effects of teflubenzuron (TFB) for Oreochromis niloticus and for Piaractus mesopotamicus. We also evaluated the acute toxicity, for both species, by using TFB in the concentrations of 700.0, 800.

Acute Toxicity and Determination of the Active Constituents of Aqueous Extract of Uncaria tomentosa Bark in Hyphessobrycon eques.

Uncaria tomentosa is a medicinal plant used in folk medicine by Amazon tribes. In this study the constituents of aqueous extract of U. tomentosa bark were quantified by chromatographic technique and its lethal concentration 50 (48 h) in Hyphessobrycon eques was determined.

Light microscope observations on the epididymis of paca (Agouti paca).

The features of paca epididymis, based on its appearance in light microscope, is described in this paper. The cellular population of the epithelial lining comprises principal cells, basal cells, apical cells, narrows cells, and hallo cells. The epididymis is divided in five distinct and continuous regions, Zone I, or initial segment, and zone II, are both localized into the head.

Histopathological biomarkers in pacu (Piaractus mesopotamicus) infected with aeromonas hydrophila and treated with antibiotics.

Pharmacochemicals usage in fish farming disease treatment can cause morphological and functional changes in absorption capacity, metabolism and excretion organs. The aim of this research was to evaluate the histopathological biomarkers in the gills, liver, kidney and skin of pacu (P. mesopotamicus), which have been infected with A.

Acute exposure of a glyphosate-based herbicide affects the gills and liver of the Neotropical fish, Piaractus mesopotamicus.

The aim of this study was to determine the acute toxicity of Roundup(®) Ready (RR) in Piaractus mesopotamicus, and evaluate the effects on the morphology of the gills and liver of exposed surviving fish. Fish were exposed to 3.0, 3.