Identificação taxonômica de três lepidópteros em cajueiro no Brasil.

Este trabalho objetiva relatar a identificacao taxonomica de tres especies de lepidopteros, pragas do cajueiro.bitstream/CNPAT-2010/5372/1/Ct-026.pd

Ocorrência e controle de alguns artrópodes associados ao abacaxizeiro no distrito irrigado de Jaguaribe-Apodi, Ceará.

Como objetivo de se conhecer as principais pragas do abacaxizeiro na regiao da chapada do Jaguaribe-Apodi, foram conduzidos levantamentos fitossanitarios quinzenais ... os levantamentos das pragas foram feiiotos atraves de visitas a area de cultivo ..bitstream/CNPAT-2010/5413/1/Ct-039.pd

Ocorrência de Plectrophoroides incertus Voss, 1990, em cajueiro (Anacardium occidentale L.)

No presente trabalho registra-se, pela primeira vez, a ocorrencia do curculionideo Plectrophoroides incertus Voss, 1990 (Coleoptera; Curculionidae), como inseto nocivo ao cajaueiro (anacardium occidentale L.). A constatacao ocorreu no Campo Experimental de Pacajus, da Embrapa Agroindustria Tropical, em Pacajus, Ceara, Brasil, onde o adulto foi observado atacando folhas da planata, alimentando-se dos tecidos internervurais. Apresenta-se tambem um resumo de descricao original da especie publicada em 1990 por Eduard Voss

Examining Social, Cognitive and Teaching Presences in an Online Teacher Development Course Using WhatsApp and Community of Inquiry

Over the last decade, advancements in digital technologies have raised the interest of educators in all areas. Mobile learning, specifically, has drawn great attention for its potential to promote opportunities for mediating peer interactions. Drawing on the Community of Inquiry framework Garrison, Anderson and Archer’s (2000), this paper reports a quantitative analysis of the 1,670 interactions among 38 [elementary/high school teachers of Portuguese from around Brazil who participated in a 7-week continuing education course via WhatsApp. The findings show a high level of social presence at moments that the construction of collective knowledge takes place during the course

Factors controlling spatio-temporal variation in carbon dioxide efflux from surface litter, roots, and soil organic matter at four rain forest sites in the eastern Amazon

[1] This study explored biotic and abiotic causes for spatio-temporal variation in soil respiration from surface litter, roots, and soil organic matter over one year at four rain forest sites with different vegetation structures and soil types in the eastern Amazon, Brazil. Estimated mean annual soil respiration varied between 13-17 t C ha(-1) yr(-1), which was partitioned into 0-2 t C ha(-1) yr(-1) from litter, 6-9 t C ha(-1) yr(-1) from roots, and 5-6 t C ha(-1) yr(-1) from soil organic matter. Litter contribution showed no clear seasonal change, though experimental precipitation exclusion over a one-hectare area was associated with a ten-fold reduction in litter respiration relative to unmodified sites. The estimated mean contribution of soil organic matter respiration fell from 49% during the wet season to 32% in the dry season, while root respiration contribution increased from 42% in the wet season to 61% during the dry season. Spatial variation in respiration from soil, litter, roots, and soil organic matter was not explained by volumetric soil moisture or temperature. Instead, spatial heterogeneity in litter and root mass accounted for 44% of observed spatial variation in soil respiration (p < 0.001). In particular, variation in litter respiration per unit mass and root mass accounted for much of the observed variation in respiration from litter and roots, respectively, and hence total soil respiration. This information about patterns of, and underlying controls on, respiration from different soil components should assist attempts to accurately model soil carbon dioxide fluxes over space and time

Construção de captadores de água de chuva para uso em pequenas propriedades rurais.

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