Pesticide Use
Mostrando 13-24 de 113 artigos, teses e dissertações.
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13. Soil CH4 and N2O Emissions from Rice Paddy Fields in Southern Brazil as Affected by Crop Management Levels: a Three-Year Field Study
ABSTRACT Rice yield increases in response to improvements in crop management, but the impact on greenhouse gas (GHG) emissions in the subtropical region of Southern Brazil remains unknown. A three-year field study was developed aiming to evaluate the impact that an increase in crop management levels (high and very high) has on soil methane (CH4) and nitrous
Rev. Bras. Ciênc. Solo. Publicado em: 03/05/2018
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14. SPRAY DEPOSITION ON SOYBEAN CROP USING DIFFERENT TRAVEL SPEEDS AND APPLICATION RATES
ABSTRACT Farmers are seeking pesticide treatments with lower application rates and higher travel speeds. However, this can lead to a poor quality of the application. The aim of this study was to evaluate the spray deposition on soybean crop and the droplet spectra using different application rates and speeds. The experiment was conducted in soybean (R5 stage
Eng. Agríc.. Publicado em: 2018-01
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15. RESIDUE ANALYSIS OF ORGANOCHLORINE AND ORGANOPHOSPHORUS PESTICIDES IN URBAN LAKE SEDIMENTS
ABSTRACT The knowledge of pesticide residual concentrations in the environment is important to understand the threats to the environment and human health, especially when natural resources are used for human consumption. In this context, this study aimed to assess the potential ecological risk and respective sources of sediment contamination by organochlorin
Eng. Agríc.. Publicado em: 2017-12
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16. Degrading Pesticides with Waste Product: Imidazole-Functionalized Rice Husk Catalyst for Organophosphate Detoxification
Rice husk (RH) is one the largest agricultural waste products worldwide, and rice is one of the crops that use the most pesticides. Among these, organophosphates have been of increasing concern due to their high toxicity. Herein, we report the functionalization of RH with imidazole groups (RHIMZ) to obtain sustainable catalysts from waste for organophosphate
J. Braz. Chem. Soc.. Publicado em: 2017-09
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17. PESTICIDES DEPOSITION IN VINEYARDS ON DIFFERENT CONDITIONS OF LEAF WETNESS
ABSTRACT The high susceptibility to diseases of fine table grapes cultivars demand intensive use of pesticides, and the presence of water on the leaf surface can worsen the deposition of these products. The objective of this study was to evaluate the spray deposition in vine leaves in different conditions of leaf wetness, and test the effectiveness of an art
Eng. Agríc.. Publicado em: 2017-04
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18. CLINICAL ASPECTS OF THE POISONING BY THE PESTICIDE ENDOSULFAN
Endosulfan is an organochlorine insecticide, widely used in insect control. Unfortunately, it is also an acute neurotoxic compound to both insects and mammals, including humans, and has been responsible for many severe poisonings and several fatal cases. Endosulfan also imitates or enhances the effect of the female hormone estrogen, having the capability of
Quím. Nova. Publicado em: 2016-09
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19. Evaluation of the Effects of Hofmeister Series on Salting Out in the Determination of Organophosphorous Pesticides and Pyrethroids by LDS/DLLME
Various greener microextraction procedures have been proposed with low limits of detection to control of pesticides present in the environment, including the low-density solvent dispersive liquid‑liquid microextraction (LDS/DLLME) technique. The addition of electrolytes is important in order to induce the salting-out effect. Thus, it is possible to use the
J. Braz. Chem. Soc.. Publicado em: 2015-09
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20. Biodegradation of cypermethrin by immobilized cells of
Micrococcus sp. strain CPN 1Pyrethroid pesticide cypermethrin is a environmental pollutant because of its widespread use, toxicity and persistence. Biodegradation of such chemicals by microorganisms may provide an cost-effective method for their detoxification. We have investigated the degradation of cypermethrin by immobilized cells of
Micrococcus sp. strain CPN 1Braz. J. Microbiol.. Publicado em: 2015-09
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21. Ozone Treatment for the Removal of Residual Chlorothalonil and Effects on the Quality of Table Grapes
Due to uncontrolled use of pesticides and disregard for harvest intervals, some pesticide residue is present in various foods. Treatments using ozone as an alternative for food decontamination have been studied in recent years due to ozone’s high oxidation potential even at low concentrations. The present work aimed to evaluate chlorothalonil removal from
J. Braz. Chem. Soc.. Publicado em: 2015-04
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22. Pesticide use and cholinesterase inhibition in small-scale agricultural workers in southern Brazil
Realizou-se um estudo transversal controlado, com hortifruticultores, durante o período de outubro de 2009 a outubro de 2010, a fim de caracterizar o uso de praguicidas, estabelecer o perfil sócio demográfico e analisar a atividade das colinesterases em trabalhadores rurais do sul do Brasil. Os dados foram obtidos de 173 trabalhadores e 179 controles. Um
Braz. J. Pharm. Sci.. Publicado em: 2014-12
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23. Estimation of Aedes aegypti (Diptera: Culicidae) population size and adult male survival in an urban area in Panama
Traditional mosquito control strategies rely heavily on the use of chemical insecticides. However, concerns about the efficiency of traditional control methods, environmental impact and emerging pesticide resistance have highlighted the necessity for developing innovative tools for mosquito control. Some novel strategies, including release of insects carryin
Mem. Inst. Oswaldo Cruz. Publicado em: 22/08/2014
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24. Compatibility of conventional agrochemicals used in rice crops with the entomopathogenic fungus Metarhizium anisopliae
The toxicological impact of chemical pesticides on fungal entomopathogens and their use in tank-mixing can be directly measured through in vitro compatibility tests. This study reports the in vitro toxicity of eight insecticides, four fungicides and five herbicides in the conidial germination, vegetative growth and conidiation of Metarhizium anisopliae (stra
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-06