Rice Fields
Mostrando 25-36 de 55 artigos, teses e dissertações.
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25. Hot spots for diversity of Magnaporthe oryzae physiological races in irrigated rice fields in Brazil.
Abstract ? The objective of this work was to evaluate the Magnaporthe oryzae pathotype diversity in new commercial irrigated rice fields in the Araguaia River Valley, state of Tocantins, Brazil. The causal agent of rice blast has heavily affected rice production in the region. Despite the efforts of breeding programs, blast resistance breakdown has been reco
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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26. Ocorrência de agrotóxicos em águas subterrâneas de áreas adjacentes a lavouras de arroz irrigado
The objective this study was to monitor pesticide residues in groundwater at three different times and in seven regions producing rice in southern Brazil, in the 2007/08 season. Imazethapyr and fipronil were found in all regions studied. All groundwater samples from the Planície Costeira Interna to Lagoa dos Patos and Santa Catarina contained at least one p
Química Nova. Publicado em: 2011
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27. Occurrence of the rice root nematode Hirschmanniella oryzae on monsoon rice in Myanmar
During May-October 2007, soil and root samples from 539 fields were collected from 11 monsoon rice varieties in 12 regions in Myanmar. All regions surveyed and 90% of fields sampled were infested with the rice root nematode Hirschmanniella oryzae. The average H. oryzae population was 10/100 mL soil and 419/20 g roots respectively. In 6.9% of the fields sampl
Tropical Plant Pathology. Publicado em: 2010-02
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28. Occurrence of physiological disease in flooded rice fields
Publicado em: 2010
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29. Potencial de emissão de metano em lavouras de arroz irrigado / Methane emission potential in flooded rice fields
Nos últimos anos, grande atenção tem sido dirigida aos problemas potenciais ocasionáveis pelo “efeito estufa”. O homem, através da atividade industrial, consumo de combustíveis fósseis, destruição de florestas e da adoção de certas práticas agrícolas, é o principal responsável pelo fenômeno. Os principais gases que causam o efeito estufa
Publicado em: 2010
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30. Historical and member environmental aspects related to the occurrence of schistosomiasis in the municipality of Pindamonhangaba, SP. / Aspectos históricos e sócio ambientais relativos à ocorrência da esquistossomose no município de Pindamonhangaba - SP
The urbanization and the occupation of spaces in a disordered way can contribute for important changes in the environment, favoring the pollution and the use of natural resources, and contributing for the proliferation of some parasitic diseases, in special waterborne and vector-borne diseases. Schistosomiasis, one of these diseases, is caused by a trematode
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/03/2009
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31. INTERMITTENT AND CONTINUOS FLOODING IN RICE: WATER USE, AGRONOMIC EFFICIENCY AND IMAZETHAPYR, IMAZAPIC AND FIPRONIL DISSIPATION / IRRIGAÇÃO CONTÍNUA E INTERMITENTE EM ARROZ IRRIGADO: USO DE ÁGUA, EFICIÊNCIA AGRONÔMICA E DISSIPAÇÃO DE IMAZETHAPYR, IMAZAPIC E FIPRONIL
Every anthropogenic activity causes environmental impact in some extent. Rice paddy fields area are pointed out as an activity with high potential of pollution due to the large amount of water used to maintain the flooding and the intensive use of pesticides and nutrients that can be transported to the environment. Though, there are other irrigation manageme
Publicado em: 2009
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32. Efeitos antrópicos sobre concentrações de metais alcalinos na região da microbacia do Arroio Araçá, Canoas - Rio Grande do Sul
This work presents alterations in the concentrations of alkaline metals sodium, lithium and potassium, in abiotic compartments, at Araçá stream micro-basin, located in Canoas, RS. Its spring is located in a low populational density region and crosses an elevated environmental impacted urban area. Its final course crosses an agricultural area. Samples of at
Química Nova. Publicado em: 2009
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33. OCHRATOXIN A AND CITRININ IN RICE: STUDY OF METHODOLOGY FOR SIMULTANEOUS DETERMINATION OF OCCURRENCE / OCRATOXINA A E CITRININA EM ARROZ: UM ESTUDO DE METODOLOGIA PARA DETERMINAÇÃO SIMULTÂNEA DE OCORRÊNCIA
Ochratoxin A and citrinin are mycotoxins found naturally in foods and feeds. The evaluation of the risk of the consumption of contemned foods for those compositions should be dear starting from reliable data that reflect the true concentration of these toxins in different foods or inputs, especially if ingested frequently. This generates the need of necessar
Publicado em: 2009
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34. Comunidade e dieta de anuros (Amphibia, Anura) em um agroecossistema no município de Miranda, Mato Grosso do Sul
A expansão e intensificação da agricultura nas últimas décadas são consideradas umas das maiores causadoras da perda de biodiversidade em todo mundo, tanto pela destruição e fragmentação dos hábitats quanto pelo alto grau de manipulação física e uso de pesticidas e fertilizantes inerentes às suas atividades. Apesar de sistemas irrigados terem
Publicado em: 2009
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35. RESPOSTAS METABÓLICAS E ENZIMÁTICAS EM JUNDIÁS, Rhamdia quelen (HEPTAPTERIDAE) E PIAVAS Leporinus obtusidens (ANOSTOMIDAE) EXPOSTOS A HERBICIDAS UTILIZADOS NA CULTURA DO ARROZ / METABOLIC AND ENZYMATIC RESPONSES ON SILVER CATFISH Rhamdia Quelen (HEPTAPTERIDAE) AND PIAVAS Leporinus Obtusidens (ANOSTOMIDAE) EXPOSURE TO HERBICIDES UTILIZED IN THE RICE FIELDS
Neste estudo, investigaram-se os efeitos toxicológicos da exposição de peixes aos herbicidas COLOCAR CLASSE clomazone (isoxazolidinonas- Gamit), quinclorac (quinolinas- Facet) e metasulfuron metil (sulfoniluréia- Ally), utilizados na lavoura de arroz. Primeiramente, foram realizados experimentos com jundiás (Rhamdia quelen) para estabelecer uma concentr
Publicado em: 2009
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36. Identificação de áreas úmidas prioritárias para conservação da biodiversidade na bacia da Lagoa Mirim (Brasil-Uruguai): subsídios para gestão transfronteiriça
This research had the main objective to indicate priority humid areas for the conservation of the biodiversity of aquatic birds in cross border river basins, as subsidize for the shared management. As a study case it was opted to work with the river basin of the Lagoa Mirim (Brazil-Uruguay), internationally recognized by its importance for the migratory wate
Publicado em: 2007