Desempenho da cultura de milho (Zea mays L.) submetida a aplicação de herbicidas pós-emergentes, em diferentes situações de manejo

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ISBN 13 :
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Book Synopsis Desempenho da cultura de milho (Zea mays L.) submetida a aplicação de herbicidas pós-emergentes, em diferentes situações de manejo by :

Download or read book Desempenho da cultura de milho (Zea mays L.) submetida a aplicação de herbicidas pós-emergentes, em diferentes situações de manejo written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A aplicação de herbicidas pós-emergentes na cultura de milho é intensa, expondo a cultura às inumeras situações de manejo em coincidência com a utilização destes agroquímicos, podendo resultar em interações prejudiciais a cultura. Sendo assim, desenvolveu-se esta pesquisa, com o objetivo de avaliar a possibilidade de interação entre esses herbicidas com inseticidas e adubos nitrogenados, bem como a eficácia dos herbicidas no controle de plantas daninhas. Foram instalados experimentos a campo e em casa-de-vegetação, nas dependências do Departamento de Produção Vegetal da ESALQ-USP. Foram três modalidades de experimentação, onde foi utilizado o delineamento estatístico de blocos casualizados com quatro repetições. O primeiro experimento avaliou a interação entre os herbicidas pós-emergentes, mesotrione, nicosulfuron e iodosulfuron + foramsulfuron, e as fontes nitrogenadas, sulfato de amônia em cobertura e uréia incorporada. Após a analise dos resultados, foram observados alguns sintomas fitotóxicos causados pelos herbicidas. Tais sintomas evoluíram até o total desaparecimento, tornando-se imperceptíveis ao longo do ciclo da cultura, a qual apresentou altura de pendoamento semelhante a testemunha. Os rendimentos de grãos e o peso de mil grãos não indicam reduções de produtividade. Tanto para a uréia, quanto para o sulfato de amônio, não detectou-se sintomas de interatividade fitotóxica para o híbrido AGN 2012. O segundo, avaliou a interação entre herbicidas pós-emergentes, nicosulfuron e mesotrione em mistura com atrazina, e os inseticidas clorpirifós, lambdacyhalotrina, e thiamethoxan + lambdacyhalotrina, aplicados em mistura de tanque. Ocorreram injúrias fitotóxicas sinérgisticas para os tratamentos envolvendo o inseticida clorpirifós. Não ocorreram reduções de altura, rendimento e peso de 1000 grãos. Isso indica a capacidade do híbrido AGN 2012 em superar as fitotoxicidades, mas não isenta a mistura do risco de perda de rendimento em outras situações. A terceira, testou a eficácia dos herbicidas pós-emergentes mesotrione + atrazina, nicosulfuron + atrazina, nicosulfuron e iodosulfuron + foramsulfuron, no controle de Brachiaria plantaginea, Digitaria horizontalis, Panicum maximum, Eleusine Indica, Ipomoea grandifolia e Bidens pilosa suscetível e resistente aos herbicidas inibidores da ALS. Foi observado que a planta daninha no estádio inicial de crescimento, é melhor controlada pelos herbicidas; as misturas de herbicidas são mais eficazes, permitindo controlar plantas em estádios de crescimento mais avançados; o Panicum maximum requer doses maiores dos herbicidas ou a mudança da estratégia de controle; o milho pode ser uma alternativa no controle de Bidens pilosa resistente aos inibidores da ALS, se cultivado como cultura de sucessão em um sistema de produção, com uso de herbicidas com alternativos mecanismos de ação. A pesquisa conclui que herbicidas pós-emergentes aplicados na cultura de milho, podem ter sua seletividade reduzida quando aplicado simultaneamente com inseticidas e adubos nitrogenados, porém as fitotoxicidades causadas por estas interações sinérgicas podem não reduzir a produtividade final como ocorreu neste trabalho, em função de combinações entre fatores climáticos e culturais. A eficácia desses herbicidas, estudada para plantas daninhas da cultura de milho, depende do estádio fenológico destas plantas, sendo que a mistura de mesotrione + atrazina é uma alternativa para o controle de B. pilosa resistente aos inibidores da ALS.

Desempenho da cultura de milho (Zea mays L.) submetida a diferentes herbicidas na ausência de plantas daninhas

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ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (559 download)

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Book Synopsis Desempenho da cultura de milho (Zea mays L.) submetida a diferentes herbicidas na ausência de plantas daninhas by : Ramiro Fernando López Ovejero

Download or read book Desempenho da cultura de milho (Zea mays L.) submetida a diferentes herbicidas na ausência de plantas daninhas written by Ramiro Fernando López Ovejero and published by . This book was released on 2000 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Com o objetivo de avaliar o efeito fitotóxico dos herbicidas aplicados em pré e pós-emergência na cultura de milho em plantio direto, mantendo as parcelas experimentais totalmente no limpo, foram realizadas avaliações visuais aos 7, 14 e 21 dias após aplicação dos mesmos, adotando a escala da European Weed Research Council (EWRC, 1964). Para isso, foi semeado o híbrido Pioneer 3027, no qual foram realizadas aplicações com os seguintes princípios ativos: (i) Atrazine + Metolachlor (PréE), (ii) Atrazine + Metolachlor + Nicosulfuron (PósE), (iii) Nicosulfuron (PósE), (iv) Nicosulfuron + Atrazine (PósE), (v) Atrazine + óleo vegetal (PósE) e (vi) Atrazine + Simazine (PósE), quando a planta apresentou 2 (estádio 0-1), 4 (estádio 1) e 8 folhas (estádio 2). O delineamento experimental foi em blocos casualizados com vinte e dois tratamentos e três repetições. Determinou-se o efeito dos herbicidas sobre a fenologia, população, altura de planta, área foliar e nos componentes do rendimento da cultura. Concluiu-se que: (i) os danos dependem dos ingredientes ativos, da dosagem e do estádio fenológico da cultura; (ii) a duração dos estádios fenológicos da cultura de milho não é afetada pelos herbicidas utilizados; (iii) os herbicidas não provocam alterações morfológicas e não comprometem área foliar, porém, quando aplicados no estádio fenológico 2 (8 folhas), reduzem o rendimento devido à alteração do número de fileiras por espiga, núm.

Fitotoxicidade de Herbicidas na cultura milho

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Publisher : Editora Dialética
ISBN 13 : 6525263662
Total Pages : 67 pages
Book Rating : 4.5/5 (252 download)

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Book Synopsis Fitotoxicidade de Herbicidas na cultura milho by : Paulo César Endrigo

Download or read book Fitotoxicidade de Herbicidas na cultura milho written by Paulo César Endrigo and published by Editora Dialética. This book was released on 2022-11-17 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Este livro foi concebido para atender as necessidades dos profissionais que trabalham com recomendação, prescrição, pesquisa e desenvolvimento de uma agricultura sustentável no Brasil. Esta obra é fruto de um estudo de dissertação de mestrado durante dois anos, com trabalho realizado a campo e em ambiente controlado na casa de vegetação. O ciclo do milho (Zea mays) possui etapas de desenvolvimento nas quais se busca manter a sanidade e adequada demanda nutricional. Porém, pelo rápido desenvolvimento da cultura, as etapas de manejo ocorrem em curto intervalo de tempo que, muitas vezes, coincidem com a aplicação simultânea de herbicidas e fertilizantes. O trabalho contido neste livro tem como objetivo avaliar a interação de herbicidas pós-emergentes, épocas e métodos de aplicação da adubação nitrogenada em cobertura na fitotoxicidade e no rendimento de grãos da cultura do milho. Enfim, este livro deve constar na bibliografia de todos os profissionais que trabalham com manejo na cultura do milho.

Desempenho de herbicidas na cultura de milho (Zea mays L.).

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ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (559 download)

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Book Synopsis Desempenho de herbicidas na cultura de milho (Zea mays L.). by : Vagner Camarini Alves

Download or read book Desempenho de herbicidas na cultura de milho (Zea mays L.). written by Vagner Camarini Alves and published by . This book was released on 2001 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Continuação) tratamentos herbicidas em pós-emergência não diferiram entre si; (iv) o tratamento 9 (Alachlor 'mais' Atrazine, 6 L/ha), dentre os tratamentos herbicidas em pré-emergência, foi o que apresentou menor rendimento; (v) os tratamentos 17 (Atrazine 'mais' Metolachlor, 6L/ha), 19 (Dimethenamid 'mais' Atrazine, 1,25 'mais' 2,5 L/ha) e 15 (Atrazine 'mais' Dimethenamid-p, 3,5 L/ha), dentre os tratamentos herbicidas em pós-emergência, foram os que apresentaram maior rendimento; (vi) o tratamento 18 (Alachlor 'mais' Atrazine, 6 L/ha), dentre os tratamentos herbicidas em pós-emergência, foi o que apresentou menor rendimento; e (vii) os herbicidas testados, quando aplicados em pré-emergência, não apresentaram controle satisfatório para trapoeraba.

Fertilizing for High Yield and Quality

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ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (891 download)

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Book Synopsis Fertilizing for High Yield and Quality by : Lindbergue Araújo Crisóstomo

Download or read book Fertilizing for High Yield and Quality written by Lindbergue Araújo Crisóstomo and published by . This book was released on 2007 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acerola; Banana; Cashew: dwarf variety; Citrus; Coconut: green dwarf variety; Guava; Mango; Papaya; Passion-fruit; Pineapple; Soursop.

Proximal Soil Sensing

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Publisher : Springer Science & Business Media
ISBN 13 : 9048188598
Total Pages : 440 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Proximal Soil Sensing by : Raphael A. Viscarra Rossel

Download or read book Proximal Soil Sensing written by Raphael A. Viscarra Rossel and published by Springer Science & Business Media. This book was released on 2010-07-25 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on developments in Proximal Soil Sensing (PSS) and high resolution digital soil mapping. PSS has become a multidisciplinary area of study that aims to develop field-based techniques for collecting information on the soil from close by, or within, the soil. Amongst others, PSS involves the use of optical, geophysical, electrochemical, mathematical and statistical methods. This volume, suitable for undergraduate course material and postgraduate research, brings together ideas and examples from those developing and using proximal sensors and high resolution digital soil maps for applications such as precision agriculture, soil contamination, archaeology, peri-urban design and high land-value applications, where there is a particular need for high spatial resolution information. The book in particular covers soil sensor sampling, proximal soil sensor development and use, sensor calibrations, prediction methods for large data sets, applications of proximal soil sensing, and high-resolution digital soil mapping. Key themes: soil sensor sampling – soil sensor calibrations – spatial prediction methods – reflectance spectroscopy – electromagnetic induction and electrical resistivity – radar and gamma radiometrics – multi-sensor platforms – high resolution digital soil mapping - applications Raphael A. Viscarra Rossel is a scientist at the Commonwealth Scientific and Industrial Research Organisation (CSIRO) of Australia. Alex McBratney is Pro-Dean and Professor of Soil Science in the Faculty of Agriculture Food & Natural Resources at the University of Sydney in Australia. Budiman Minasny is a Senior Research Fellow in the Faculty of Agriculture Food & Natural Resources at the University of Sydney in Australia.

Grazing Management

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ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Grazing Management by : John Hodgson

Download or read book Grazing Management written by John Hodgson and published by . This book was released on 1990-08-15 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text considers grazing management from the viewpoint of the ecology of grazing systems and focuses on the interrelationships between plant and animal populations which affect the stability of such systems, and the output of animal products from them. Relates the steps in the production process to the grassy surface characteristics that influence plant and animal behavior and uses these relationships to create a practical framework for management decisions.

Soil Management for Sustainability

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ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Soil Management for Sustainability by : R. Lal

Download or read book Soil Management for Sustainability written by R. Lal and published by . This book was released on 1991 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book manuscripts presented originally at a World Association of Soil and Water Conservation conference held in 1989 are collected. Topics include basic processes (e.g. soil structure, soil erosion, soil compaction); management options (e.g. conservation tillage); policy issues and priorities

BOTANAL

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Publisher :
ISBN 13 : 9780643053212
Total Pages : 24 pages
Book Rating : 4.0/5 (532 download)

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Book Synopsis BOTANAL by : Campbell Kenneth McDonald

Download or read book BOTANAL written by Campbell Kenneth McDonald and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Soil Ecotoxicology

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Publisher : CRC Press
ISBN 13 : 9781566701341
Total Pages : 406 pages
Book Rating : 4.7/5 (13 download)

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Book Synopsis Soil Ecotoxicology by : Joseph Tarradellas

Download or read book Soil Ecotoxicology written by Joseph Tarradellas and published by CRC Press. This book was released on 1996-12-23 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soils are receptacles for a wide range of hazardous chemicals generated by human activities. Whether or not this contamination is deliberate, accurate toxicity assessments are important for health and economic reasons. Soil Ecotoxicology discusses the sources, fate, and transport of hazardous chemicals in soils. The fate (biodegradation and modeling) and the potential impacts of pesticides on soil ecosystems are emphasized, and methodologies for performing toxicity assessments are provided.

Microplastic Pollutants

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Publisher : Elsevier
ISBN 13 : 0128094060
Total Pages : 336 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Microplastic Pollutants by : Christopher Blair Crawford

Download or read book Microplastic Pollutants written by Christopher Blair Crawford and published by Elsevier. This book was released on 2016-11-29 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microplastic Pollutants introduces the reader to the growing problem of microplastic pollution in the aquatic environment and is the first ever book dedicated exclusively to the subject of microplastics. Importantly, this timely full-colour illustrated multidisciplinary book highlights the very recent realization that microplastics may transport toxic chemicals into food chains around the world. Microplastic pollutants is currently an important topic in both industry and academia, as well as among legislative bodies, and research in this area is gaining considerable attention from both the worldwide media and scientific community on a rapidly increasing scale. Ultimately, this book provides an excellent source of reference and information on microplastics for scientists, engineers, students, industry, policy makers and citizens alike.

Trade and Market in the Early Empires

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ISBN 13 :
Total Pages : 382 pages
Book Rating : 4.:/5 (76 download)

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Book Synopsis Trade and Market in the Early Empires by : Karl Polanyi

Download or read book Trade and Market in the Early Empires written by Karl Polanyi and published by . This book was released on 1965 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Grassland

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Publisher : Brill Wageningen Academic
ISBN 13 :
Total Pages : 438 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Grassland by : D. A. McGilloway

Download or read book Grassland written by D. A. McGilloway and published by Brill Wageningen Academic. This book was released on 2005 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The concept of grasslands as a global resource is not new. Indeed many recognised authorities have been canvassing for a global approach to understanding, managing and exploiting this resource for many years. This is the first book that gathers together leading experts from around the world to outline our current understanding of this complex ecosystem, the ways in which it can be enhanced and utilised and where the research challenges are for the future. The following themes unite the book: - Efficient production from grassland; - Grassland and the environment; - Delivering the benefits from grassland. The reader is given an in depth understanding of the biology of the system and how grasslands are crucial for soil stabilisation and water quality. Secondly, much attention is given to how grasslands offer the possibility of increasing food supply and income generation, which is a hugely important but often ignored facet in today's climate of extensification and biodiversity. Current advances in the grassland sciences have a proven potential to promote the economic development and environmental stability of regions, nations and peoples, particularly in some of the most resource-limited areas of the world. Approaches for achieving the most effective development and adoption of new technology are reviewed."

Peasant Society

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ISBN 13 :
Total Pages : 1038 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Peasant Society by : Jack M. Potter

Download or read book Peasant Society written by Jack M. Potter and published by . This book was released on 1967 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Vegetation of the Earth and Ecological Systems of the Geo-biosphere

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Publisher : Springer Science & Business Media
ISBN 13 : 1468404687
Total Pages : 295 pages
Book Rating : 4.4/5 (684 download)

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Book Synopsis Vegetation of the Earth and Ecological Systems of the Geo-biosphere by : Heinrich Walter

Download or read book Vegetation of the Earth and Ecological Systems of the Geo-biosphere written by Heinrich Walter and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phytomass and Primary Production of the Various Vegetational Zones and of the Entire Biosphere The biosphere is that thin layer at the earth's surface in which living organisms exist and biological cycling takes place. It includes the upper horizons of the soil in which plants root, the atmosphere near the ground, (insofar as organisms penetrate this space), and all the surface waters. More than 99% of the earth's biomass is phytomass, to which we shall limit our discussion. Amounts of phytomass are distinctly related to vegeta tional zones. Because accurate determination of phytomass and primary production is difficult, only gross estimates have been available until recently. However, in 1970, Bazilevich et al. published (in Russian) more accurate calculations, based on the rapidly accumulating literature, for the various thermal zones and bioclimatic regions of the earth. These authors calculated mean phyto mass and mean annual primary production for the various regions as dry mass (in tons) per hectare. On the basis of measurements of the areas covered by the individual regions, excluding rivers, lakes, glaciers, and permanent snow, total phytomass and total annual primary production for the various regions were obtained (see table). The sum of these figures is the phytomass and annual production of the land surface of the earth. In addition, the table gives corresponding data for the waters of the earth. The values involved are potential i. e. , they are based on natural vegetation uninfluenced by man.

Climate Dynamics of the Tropics

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Publisher : Springer Science & Business Media
ISBN 13 : 9401131562
Total Pages : 507 pages
Book Rating : 4.4/5 (11 download)

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Book Synopsis Climate Dynamics of the Tropics by : S. Hastenrath

Download or read book Climate Dynamics of the Tropics written by S. Hastenrath and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of my book "Climate and Circulation of the Tropics" was reasonably up to date to the middle of 1985. In a second printing in 1988 it was possible to complete a few literature references and to correct some misprints. However, vigorous research has taken place over the past five years in various areas of tropical climate dynamics, especially in the atmosphere-ocean mechanisms of climate anomalies, climate prediction, ocean circulation, and paleoclimates. Promising progress has also been made in the application of general circulation modelling to tropical climate problems. In the present second edition, named "Climate Dynamics of the Tropics", I have attempted to incorporate much of the recent work to late 1990. Chapters 8 and 9 have been essentially re-written, and major additions have been made to Chapters 4 and 12 in particular. I would like to acknowledge the continued support by the U.S. National Science Foundation over the past five years. B. Parthasarathy, Poona, and H. Lessmann, San Salvador, sent me updates of data series not easily accessible. I have benefitted from discussions with numerous colleagues in the United States and overseas. In the preparation of this second edition, Marilyn Wolff patiently transferred my illegible hand-written drafts onto word processor. Dierk Polzin and Dan Skemp assisted me with the creation of the page masters and the subject index and Christopher Collimore with the author index.

Ecotoxicology in Latin America

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ISBN 13 : 9781536106008
Total Pages : 0 pages
Book Rating : 4.1/5 (6 download)

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Book Synopsis Ecotoxicology in Latin America by : Cristiano V. M. Araújo

Download or read book Ecotoxicology in Latin America written by Cristiano V. M. Araújo and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Latin America is one of the most diverse but also vulnerable regions in the world that is under continuous anthropogenic pressure due to increasing urban, industrial and agricultural developments. Although there are many research groups studying the impacts caused by those pressures, the results and conclusions obtained by many of them are largely unknown because their studies are mostly published at the local or regional scale. Ecotoxicology in Latin America represents an effort to collect and share research performed in Latin America in the area of ecotoxicology and environmental risk assessment, presenting a collection of relevant and innovative studies focused on the following topics: (i) Contaminant entrance, transportation, distribution and fate; (ii) Environmental risk in freshwater ecosystems; (iii) Ecological risk in coastal zones; (iv) Biomonitoring programs: water, sediment and air; (v) Physiological effects and biomarkers; (vi) Soil ecotoxicology; (vii) Bioaccumulation and human risk; (viii) Toxicity of emerging contaminants; and (ix) Frontiers in Ecotoxicology. This selection of topics aims at covering the most important subjects and applications of ecotoxicology, including classical and novel subjects. Therefore, this book contains chapters related to different environmental compartments prone to contamination (water, sediment, soil and air), to different contamination sources (agriculture, industry, urban discharges and natural emissions), and to multiple biological responses at different organizational levels (individual to ecosystems, including human beings). It is envisioned to have an international projection within and beyond Latin American countries, as it is a great opportunity to increase the networks not only among Latin American research teams working on similar subjects, but also with teams from other regions. The idea of this book was to favour the connection among groups to quickly improve the development of methods and their application in ecotoxicological and environmental risk studies in Latin America. This book will be useful to important sectors of environmental sciences and related areas, and to specific target demographics such as students and researchers acting in environmental studies, and decision-makers (i.e., politicians and environmental organizations). Ecotoxicology in Latin America presents 34 chapters authored by 111 researchers from 12 Latin American countries (Argentina, Brazil, Chile, Colombia, Costa Rica, Cuba, Ecuador, Mexico, Panama, Peru, Uruguay, and Venezuela) and from 6 non-Latin American countries (Austria, Belgium, Italy, Portugal, Spain, and USA).