Citrus Crop
Mostrando 13-24 de 49 artigos, teses e dissertações.
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13. Modelling evapotranspiration for reference crop and acid lime orchard based on regression and artificial neural network tecniques / Modelagem da evapotranspiração de referência e da evapotranspiração de limeira ácida com aplicação de técnicas de regressão e redes neurais artificiais
The main objective of this study was to test artificial neural networks (ANNs) of multilayer perceptron type (MLP) for estimating reference evapotranspiration, diffusive leaf conductance and crop evapotranspiration of a mature and irrigated citrus orchard. The ANNs were trained under conjugate gradient algorithm. The sigmoid and linear activation functions w
Publicado em: 2010
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14. Thiamethoxan on sugar cane, common bean, soybean, citrus and coffee plants: parameters of development and biochemical aspects / Tiametoxam em plantas de cana-de-açúcar, feijoeiro, soja, laranjeira e cafeeiro: parâmetros de desenvolvimento e aspectos bioquímicos
Insecticides and fungicides are often studied to their efficiency in controlling pests and diseases, however can cause physiological effects little known that can affect crop growth. Thiamethoxan is a systemic insecticide from the neonicotinoid group, nitroguanidine family, which acts on nicotinic acetylcholine receptor of insects, damaging their nervous sys
Publicado em: 2010
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15. Análise da expressão de genes que codificam enzimas antioxidantes em citrumeleiro Swingle com alto acúmulo de prolina submetido ao déficit hídrico
Condições de estresse abiótico levam ao acúmulo de espécies reativas de oxigênio com o concomitante aumento da atividade de enzimas antioxidantes em plantas. Estudos anteriores mostraram que aplicações exógenas de prolina amenizam os efeitos deletérios causados pelo estresse oxidativo devido à sua habilidade de aumentar a atividade de enzimas anti
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/02/2009
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16. Caracterização molecular e avaliação da resistência ao vírus da tristeza dos citros (CTV) em plantas transgênicas de laranja Valência(Citrus sinensis L. Osbeck) / Molecular characterization and resistance evaluation to citrus tristeza virus (CTV) in transgenic plants of Valência orange (Citrus sinensis L. Osbeck)
In Brazil, citrus is one of the most important cultures. The productivity of this culture in the country is still considered low and this fact is due to several pests and diseases that affect the crop. Among the diseases there is the tristeza, caused by Citrus tristeza virus (CTV). This pathogen can also be related with another important disease, the citrus
Publicado em: 2009
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17. Efeito de extratos vegetais e óleos essenciais no desenvolvimento de Plutella xylostella (L.) (Lepidoptera:Plutellidae) / Effect of plant extracts and essential oils on Plutella xylostella (L.) (Lepidoptera :Plutellidae)
The family Brassicaceae is one of the most economically important in the world, having as their main pest to Plutella xylostella (L.) (Lepidoptera: Plutellidae), which causes great damage to the crop with up to 100% of yield losses. In order to investigate alternatives to synthetic insecticides, medicinal plants have been in recent years in search of compoun
Publicado em: 2009
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18. Agroclimatic zoning for the culture of citros in the agreste of Pernambuco state, Brasil / Zoneamento agroclimático para a cultura dos citros no agreste pernambucano
The objective of this work was to evaluate the agroclimatic potential and to characterize the climatic risks zoning for citros production in Agreste Pernambuco State. Climatics data inside and next to the area of study was been used. Monthly average precipitations of 100 weather station with series of data above of 20 years of registers was been used. Places
Publicado em: 2009
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19. Evapotranspiração da lima ácida Tahiti(Citrus latifolia Tan.) determinada por lisimetria de pesagem / Evapotranspiration of lime acid "Tahiti" (Citrus latifólia Tan.) determined by a weighing lysimeter
Brazil is the largest world producer of citrus crop, with São Paulo state leading as the largest national producer. Recent studies show that irrigated areas of citrus in the state have been increasing significantly in the last few years. However, lack of information on irrigation management related to this crop is one of the main problems encountered by the
Publicado em: 2008
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20. Continuous usage of cover crops in citrus: influence in seedbank, weeds, and soils chemical characteristics / Uso contínuo de coberturas vegetais em citros: influência no banco de sementes, na comunidade infestante e nas características químicas do solo
In the last few years, the consumers, especially those of the external market, have become more and more interested in food security, namely on what it refers to the means of production. This fact has motivated the search for alternatives of low environmental impact, and one of these is the use cover crops or green manure. In this context the current researc
Publicado em: 2008
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21. Caracterização de onze cultivares copa de laranja no norte do Paraná / Caracterização de 11 cultivares copa de laranja no norte do Paraná /Zuleide Hissano Tazima
The Instituto Agronômico do Paraná IAPAR is the official institution responsible for recommendation of citrus cultivars for the State of Paraná, Brazil. An Active Citrus Germplasm Bank - AGB Citrus was established in the IAPAR´s Experimental Station, in Londrina for evaluation of citrus accessions and recommendation of the best ones for the growers. T
Publicado em: 2008
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22. Identification of photoperception and light signal transduction pathways in citrus
Studies employing model species have elucidated several aspects of photoperception and light signal transduction that control plant development. However, the information available for economically important crops is scarce. Citrus genome databases of expressed sequence tags (EST) were investigated in order to identify genes coding for functionally characteri
Genetics and Molecular Biology. Publicado em: 2007
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23. In silico analysis of the endogenous time-keeping mechanism in citrus
The endogenous time-keeping mechanism is responsible for organizing plant physiology and metabolism according to periodic environmental changes, such as diurnal cycles of light and dark and seasonal progression throughout the year. In plants, circadian rhythms control gene expression, stomatal opening, and the timing component of the photoperiodic responses,
Genetics and Molecular Biology. Publicado em: 2007
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24. In silico analysis of phytohormone metabolism and communication pathways in citrus transcriptome
Plant hormones play a crucial role in integrating endogenous and exogenous signals and in determining developmental responses to form the plant body throughout its life cycle. In citrus species, several economically important processes are controlled by phytohormones, including seed germination, secondary growth, fruit abscission and ripening. Integrative ge
Genetics and Molecular Biology. Publicado em: 2007