No evidence of transmission of grapevine leafroll-associated viruses by phylloxera (Daktulosphaira vitifoliae).

Abstract Grapevine leafroll disease is associated with several species of phloem-limited grapevine leafrollassociated viruses (GLRaV), some of which are transmitted by mealybugs and scale insects. The grape phylloxera, Daktulosphaira vitifoliae (Fitch) Biotype A (Hemiptera: Phylloxeridae), is a common vineyard pest that feeds on the phloem of vine roots. There is concern that these insects may transmit one or more GLRaV species, particularly GLRaV-2, a species in the genus Closterovirus. A field survey was performed in vineyards with a high incidence of grapevine leafroll disease and D. vitifoliae was assessed for acquisition of GLRaV. In greenhouse experiments, the ability of D. vitifoliae to transmit GLRaV from infected root sections or vines to co-planted virus-free recipient vines was tested. There were no GLRaV-positive D. vitifoliae in the field survey, nor did D. vitifoliae transmit GLRaV- 1, ?2, ?3, or -4LV in greenhouse transmission experiments. Some insects tested positive for GLRaV after feeding on infected source vines in the greenhouse, however there was no evidence of virus transmission to healthy plants. These findings, in combination with the sedentary behaviour of the soil biotype of D. vitifoliae, make it unlikely that D. vitifoliae is a vector of any GLRaV.

Determination of bioactive amines in tropical wines produced at Brazilian's Northeast.

The wine production in the region of the Sub-middle São Francisco river Valley has started there are few years ago.The region has a climate variability that allows to obtain two or three harvests per year, which influences significantly the composition of the grapes. This work aimed to evaluate the amount of amines present in white and red tropical wines produced in the Northeast of Brazil. The winemaking was done by the traditional method. After stabilizing the wines were bottled and then analyzed for the determination of the amines putrescine, spermidine and spermine, by thin layer chromatography (TLC). The harvests were in June (harvest I) and November (harvest II) 2009. The results showed that the edaphoclimatic conditions of the two harvests had significant influence (p> 0.05) on bioactive amines concentration, with high values for red wines. In addition, tropical wines from Sub-middle São Francisco river Valley showed adequate correlation between bioactive amines as compared to other wines in the world.

The Brazilian grape juice: market and prospects.

This article aims to analyze the market of Brazilian grape juice.

Marca coletiva dos vinhos finos de Santa Catarina, Brasil: uma estratégia alternativa.

Com a abertura da economia brasileira a partir de meados da década de 1990, o setor vitivinícola nacional passou a enfrentar uma forte concorrência externa, registrando-se taxas significativas de importações. No período de 2002-2010, o crescimento das importações de produtos vitivinícolas (vinhos, espumantes, vinhos licorosos, etc.), pelo mercado brasileiro foi de aproximadamente 183%. Portanto, de modo semelhante a outros setores do agro-negócio mundial, o setor vitivinícola tem se caracterizado pela crescente competição entre blocos econômicos, a qual tem sido marcada por um ambiente empresarial cada vez mais intenso em tecnologia e gestão. Diante deste cenário e da evidência de que, para competir neste mercado, é necessário uma performance diferenciada, em 2008, a Associação Catarinense dos Produtores de Vinhos Finos de Altitude - ACAVITIS, com o apoio institucional e financeiro do Serviço Nacional de Apoio a Micro e Pequena Empresa - SEBRAE-SC e, sob a coordenação técnica da Empresa Brasileira de Pesquisa Agropecuária - Embrapa Uva e Vinho e da Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - EPAGRI, implantou o projeto para criação da Marca Coletiva ACAVITIS (MCA), objetivando garantir qualidade e imagem diferenciada para seus produtos diante da concorrência. Em 2009, o registro da MCA foi protocolado junto ao Instituto Nacional de Propriedade Industrial - INPI e, na safra de 2011, serão certificados seus primeiros vinhos.