scholarly journals Degradation and sorption of fipronil and atrazine in Latossols with organic residues from sugarcane crop

2016 ◽  
Vol 46 (7) ◽  
pp. 1172-1177 ◽  
Author(s):  
Raquel de Oliveira Silva ◽  
Rômulo Penna Scorza Júnior ◽  
Maricy Raquel Lindenbah Bonfá ◽  
Maria Fernanda Zaneli Campanari ◽  
Ieda de Carvalho Mendes
Keyword(s):  
Half Life ◽  
Field Capacity ◽  
Organic Residues ◽  
Pesticide Degradation ◽  
Mato Grosso ◽  
Sugarcane Crop ◽  
Degradation Rates ◽  
Life Values ◽  
Mato Grosso Do Sul ◽  
Atrazine Degradation

ABSTRACT: Organic residues from sugarcane crop and processing (vinasse, boiler ash, cake filter, and straw) are commonly applied or left on the soil to enhance its fertility. However, they can influence pesticide degradation and sorption. The objective of this study was to assess the effect of adding these organic residues on the degradation and sorption of fipronil and atrazine in two soils of the State of Mato Grosso do Sul, MS, Brazil. The degradation experiment was carried out with laboratory-incubated (40 days; 28°C; 70% field capacity) soils (0-10cm). The batch equilibration method was used to determine sorption. Fipronil (half-life values of 15-105 days) showed to be more persistent than atrazine (7-17 days). Vinasse application to the soil favored fipronil and atrazine degradation, whereas cake filter application decreased the degradation rates for both pesticides. Values for sorption coefficients (Kd) were determined for fipronil (5.1-13.2mL g-1) and atrazine (0.5-1.5mL g-1). Only straw and cake filter residues enhanced fipronil sorption when added to the soil, whereas all sugarcane residues increased atrazine sorption.

scholarly journals Photocatalytic Detoxification of Some Insecticides in Aqueous Media Using TiO2 Nanocatalyst

2021 ◽  
Vol 18 (17) ◽  
pp. 9278
Author(s):  
Ahmed Massoud ◽  
Aly Derbalah ◽  
Ibrahim El-Mehasseb ◽  
Moustafa Saad Allah ◽  
Mohamed S. Ahmed ◽  
...  
Keyword(s):  
Half Life ◽  
Advanced Oxidation Process ◽  
Aqueous Media ◽  
Advanced Oxidation ◽  
Future Research ◽  
Biochemical Alterations ◽  
Tio2 Catalyst ◽  
Degradation Rates ◽  
Effective System ◽  
Life Values

The present study was performed to fabricate a titanium dioxide (TiO2) nanocatalyst with proper characteristics for the removal of some insecticides (dimethoate and methomyl) from aqueous media. A TiO2 catalyst of regular (TiO2—commercial—/H2O2/UV) or nano (TiO2—synthesized—/H2O2/UV) size was employed as an advanced oxidation process by combining it with H2O2 under light. Moreover, the total detoxification of insecticides after treatment with the most effective system (TiO2(s)/H2O2/UV) was also investigated through exploring the biochemical alterations and histopathological changes in the liver and kidneys of the treated rats. Interestingly, the present study reported that degradation rates of the examined insecticides were faster using the TiO2 catalyst of nano size. Complete degradation of the tested insecticides (100%) was achieved under the TiO2(s)/H2O2/UV system after 320 min of irradiation. The half-life values of the tested insecticides under H2O2/TiO2(c)/UV were 43.86 and 36.28 for dimethoate and methomyl, respectively, whereas under the H2O2/TiO2(c)/UV system, the half-life values were 27.72 and 19.52 min for dimethoate and methomyl, respectively. On the other hand, no significant changes were observed in the biochemical and histopathological parameters of rats administrated with water treated with TiO2(s)/H2O2/UV compared to the control, indicating low toxicity of the TiO2 nanocatalyst-. Altogether, the advanced oxidation processes using TiO2 nanocatalyst can be considered as a promising and effective remediation technology for the complete detoxification of methomyl and dimethoate in water. However, further future research is needed to identify the possible breakdown products and to verify the safety of the used nanomaterials.

scholarly journals Biological and morphological aspects of Plectris aliena (Coleoptera: Melolonthidae) in sugarcane in Brazil

2021 ◽  
Vol 61 ◽  
pp. e20216113
Author(s):  
Elias Soares Gomes ◽  
Crébio José Ávila ◽  
Mariana Alejandra Cherman
Keyword(s):  
Life Cycle ◽  
Seasonal Distribution ◽  
Light Traps ◽  
Mato Grosso ◽  
The Third ◽  
Sugarcane Crop ◽  
Morphological Aspects ◽  
Third Stage ◽  
Mato Grosso Do Sul ◽  
Made In

Plectris aliena (Coleoptera, Melolonthidae) Chapin is a species already recorded causing serious damage to various cultures in North America and Australia. Although its occurrence has recently been reported in Brazil, information about its distribution, taxonomy, and biology is limited. Thus, this study aims to report this new occurrence of P. aliena in Deodápolis (Mato Grosso do Sul, Brazil), as well as to present bioecological and morphological aspects of this species. In this way, the seasonal distribution and the life cycle was studied in the years 2017 and 2018. The larvae were sampled through trenches made in the soil and reared in the laboratory. Adults were captured using “Luiz de Queiroz” light traps. Adults have body with dense white hairs, antennae with 10 antenomeres; they measure approximately 12 mm in length, and their antennal lamellae are larger for males than females. The larvae reach 30 mm in length in the third stage and pupae show about 19 mm in length. The life cycle of this species is univoltine. Due to the great diversity of Plectris and the scarce information available about this species in South America, this study will facilitate its identification in the field and indicate the best time for monitoring in sugarcane crop.

scholarly journals Spatial variability of soil physical properties in two management systems in sugarcane crop

2012 ◽  
Vol 32 (1) ◽  
pp. 60-68 ◽  
Author(s):  
Laércio A. de Carvalho ◽  
Ismael Meurer ◽  
Carlos A. da Silva Junior ◽  
José F. Centurion
Keyword(s):  
Moisture Content ◽  
Spatial Variability ◽  
Soil Moisture Content ◽  
Total Porosity ◽  
Soil Bulk Density ◽  
Soil Physical Properties ◽  
Management Systems ◽  
Mato Grosso ◽  
Sugarcane Crop ◽  
Mato Grosso Do Sul

The aim of this study was to characterize the spatial variability of soil bulk density (Bd), soil moisture content (θ) and total porosity (Tp) in two management systems of sugarcane harvesting, with or without burning, in a Haplustox soil, in the 0-0.20 m layer. The study area is located in Rio Brilhante, state of Mato Grosso do Sul, Brazil, in Eldorado Sugar Mill. The plots have presented 180 m length, and 145.6 m width, totaling 90 points distributed in the form of a grid of nine rows by ten columns, with points spaced 20 m from its neighbor. Soil samples were collected at 0-0.20 m layer in 2007/2008 and 2008/2009 crops. The harvest with burning system had a higher density compared to mechanized harvest, in the two study periods. The moisture content as well as the porosity increased proportionally with the decrease of the density of the harvest burning system compared to the mechanized.

A Synopsis of Dicliptera (Acanthaceae) in Brazil, with the Description of Two New Species

2020 ◽  
Vol 45 (2) ◽  
pp. 340-348
Author(s):  
James Lucas da Costa-Lima ◽  
Earl Celestino de Oliveira Chagas
Keyword(s):  
New Species ◽  
South America ◽  
The State ◽  
Northeastern Brazil ◽  
Mato Grosso ◽  
The North ◽  
New Synonyms ◽  
Two New Species ◽  
Mato Grosso Do Sul ◽  
A New Species

Abstract—A synopsis of Dicliptera (Acanthaceae) for Brazil is presented. Six species are recognized: Dicliptera ciliaris, D. sexangularis, and D. squarrosa, widely distributed in South America; D. purpurascens, which ranges from the North Region of Brazil (in the state of Acre) to eastern Bolivia; D. gracilirama, a new species from the Atlantic Forest of northeastern Brazil; and D. granchaquenha, a new species recorded in dry and semideciduous forests in Bolivia and western Brazil, in the state of Mato Grosso do Sul. Furthermore, we propose new synonyms and designate lectotypes for eleven names. An identification key to the six accepted Dicliptera species in Brazil is provided.

LUGARES E NÃO LUGARES DO ESTÁGIO SUPERVISIONADO EM UNIVERSIDADES PÚBLICAS DE MATO GROSSO DO SUL: UEMS e UFGD Coleção Licenciaturas - Volume 1

2020 ◽  
Author(s):  
F. PERBONI ◽  
Carla Regina de Souza FIGUEIREDO ◽  
A. MARQUES ◽  
A. N. MILITÃO ◽  
C. N. JESUS ◽  
...  
Keyword(s):  
Mato Grosso ◽  
Mato Grosso Do Sul

O desafio do espaço platino às tendências de integração do antigo sul de Mato Grosso ao mercado nacional brasileiro: um hiato em dois tempos

2012 ◽  
Vol 11 (1) ◽  
Author(s):  
Paulo Roberto Cimo Queiroz
Keyword(s):  
Mato Grosso ◽  
Mato Grosso Do Sul

O espaço correspondente ao atual Estado brasileiro de Mato Grosso do Sul foi incorporado, no século XVI, aos circuitos do Paraguai colonial, mas, já no século XVII, no contexto que S. B. de Holanda denomina refluxo assuncenho, a presença espanhola foi sendo substituída pela luso-brasileira, passando, portanto, essa região a vincular-se, ainda que de m o do inicialmente tênue, ao sudeste da América portuguesa. Em meados d o século XIX, c om a liberação da navegação brasileira pelo rio Paraguai, essa região voltou, de certo modo, a fazer parte do espaço platino. O presente trabalho busca evidenciar que, a despeito das notáveis mudanças induzidas pela livre navegação, esse último período de vinculação ao espaço platino constituiu, na verdade, uma espécie de "hiato", no interior do processo mais longo, representado pela vinculação com o mercado nacional brasileiro.

Protagonismo feminino e a ditadura militar no Brasil: o caso Araguaia

2020 ◽  
Vol 14 (28) ◽  
pp. 191-208
Author(s):  
Ary Albuquerque Cavalcanti Junior
Keyword(s):  
Mato Grosso ◽  
Mato Grosso Do Sul

O presente artigo, realizado com apoio da Fundação Universidade Federal de Mato Grosso do Sul – UFMS/MEC – Brasil, é resultado dos estudos acerca da participação feminina em diferentes frentes de luta contra a ditadura civil-militar brasileira (1964-1985). Ao longo das últimas décadas, importantes contribuições para se pensar o protagonismo feminino durante a ditadura passaram a ser produzidas, permitindo o surgimento de novas perspectivas e abordagens de análise. Assim, ao pensarmos a história das mulheres no referido período, devemos observar os códigos de conduta que as cerceavam e as práticas de resistência que rompiam tanto no cenário político, público, quanto cultural, patriarcal. Assim, o objetivo deste trabalho é discutir a participação e a resistência feminina na Guerrilha do Araguaia.

Sign in / Sign up

Export Citation Format

Share Document