Hora da colheita: hora de cuidar do seu produto e de você. Estação de trabalho.

Na presente publicação, são apresentados um conjunto de equipamentos que facilitam e aumentam o rendimento das operações de colheita e beneficiamento de hortaliças. O conjunto é adequado para pequenas propriedades rurais onde não seja viável economicamente a construção de uma casa de embalagem de alvenaria, ou em propriedades maiores que precisem de uma infraestrutura de apoio junto à lavoura, para posterior remoção dos produtos colhidos para a casa de embalagem onde são executadas operações mais complexas de beneficiamento, embalagem e armazenamento.bitstream/item/120472/1/COT-101-X2-INTERNET.pd

Impactos das mudanças climáticas sobre a distribuição espacial e temporal da sarna da macieira.

Resumo: As mudanças climáticas globais, de forma geral, representam sérias ameaças à produção agrícola, modificando a incidência dos problemas fitossanitários com impactos negativos à agricultura. O Brasil é bastante vulnerável quando se trata desses impactos, devido à grande variabilidade natural do clima. O objetivo deste trabalho foi avaliar os impactos das mudanças climáticas sobre a distribuição espacial e temporal da sarna da macieira (Venturia inaequalis), no período de referência (1961-1990) e futuro (2071-2100) para o cenário A2 e B1, nas condições brasileiras. Foram elaborados mapas do período de referência (1961-1990) e, posteriormente, do futuro (2071-2100, cenários A2 e B1), utilizando o SIG Idrisi 32, baseando-se em faixas de favorabilidade das variáveis climáticas, temperatura média e duração do período de molhamento foliar. Concluiu-se que, as mudanças climáticas alterarão o panorama fitossanitário no Brasil no futuro (2071-2100) para a sarna da macieira e sua favorabilidade diminuirá, principalmente, nos meses mais críticos para o avanço da doença, nas regiões Sul e Sudeste, hoje tradicionalmente produtoras

Return period curves for extreme 5-min rainfall amounts at the Barcelona urban network

Heavy rainfall episodes are relatively common in the conurbation of Barcelona and neighbouring cities (NE Spain), usually due to storms generated by convective phenomena in summer and eastern and south-eastern advections in autumn. Prevention of local flood episodes and right design of urban drainage have to take into account the rainfall intensity spread instead of a simple evaluation of daily rainfall amounts. The database comes from 5-min rain amounts recorded by tipping buckets in the Barcelona urban network along the years 1994–2009. From these data, extreme 5-min rain amounts are selected applying the peaks-over-threshold method for thresholds derived from both 95% percentile and the mean excess plot. The return period curves are derived from their statistical distribution for every gauge, describing with detail expected extreme 5-min rain amounts across the urban network. These curves are compared with those derived from annual extreme time series. In this way, areas in Barcelona submitted to different levels of flood risk from the point of view of rainfall intensity are detected. Additionally, global time trends on extreme 5-min rain amounts are quantified for the whole network and found as not statistically significant.Peer ReviewedPostprint (author's final draft

Major effect qtl on chromosome 3 conferring maize resistance to Sugarcane mosaic virus.

The Sugarcane mosaic virus (SCMV), a maize pathogen epidemic worldwide, is the causal agent of common mosaic, one of the most important viral diseases in Brazil. In this study, we mapped and characterized quantitative trait loci (QTL) conferring resistance to SCMV in a maize population consisting of 127 F2:3 families from the cross between two Brazilian maize inbred lines, L18 (resistant) × L19 (susceptible). Field trials were carried out in two years to evaluate the F2:3 families according to a resistance score after artificial inoculation. QTLs were detected via composite interval mapping, using a linkage map based on 82 SSRs, 3 CAPS and 296 SNPs. The heritability ranged from 73.68 to 95.16% and SCMV resistance QTLs were consistently identified on chromosomes 1 and 3, showing minor and major effects, respectively. The major QTL on chromosome 3 explained a large proportion of the genetic variance, being 50 and 70% in year 1 and 2, respectively, while the minor QTL on chromosome 1 explained 11 and 8% in year 1 and 2, respectively. The SNP marker co-localized with the major QTL peak on chromosome 3 and its right flanking marker are positioned inside the predicted gene GRMZM2G122443 encoding a glucosidase II, and the left flanking marker inside the GRMZM2G140537 that encodes a protein tyrosine kinase. Moreover, within this QTL region there are also the GRMZM2G160902 and GRMZM2G122481 predicted genes, encoding a bZIP transcription factor and a cytochrome C oxidase, respectively. The colocalization with this major effect QTL suggests a putative involvement of these candidate genes with maize responses to SCMV resistance, but further functional studies are required for such validation. Our results provide resistance source and genomic target for marker-assisted breeding aiming the development of maize resistant cultivars to SCMV

Identificação das causas de perdas pós-colheita de pimentão no varejo.

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