Seletividade e eficácia de herbicidas em cultivares de feijão-caupi (Vigna unguiculata (L.) Walp.).

Objetivou-se avaliar a seletividade e eficácia de herbicidas para a cultura do feijão-caupi, através de um experimento fatorial 2 x 13, delineamento de blocos casualizados. Foram avaliados dois cultivares de feijão-caupi (BRS Xiquexique e BRS Guariba) e 13 estratégias de manejo de plantas daninhas (1: S-metolachlor, 2: metribuzin+fluazyphop-p-buthyl, 3: mazamox+fluazyphop-p-buthyl, 4: bentazon +fluazyphop-p-buthyl, 5: imazamox+bantazon +fluazyphop-p-buthyl, 6: imazetapyr +fluazyphop-p-buthyl, 7: fomesafen+fluazyphop-p-buthyl, 8: lactofen+fluazyphop-p-buthyl, 9: clorimuron-ethyl+fluazyphop-p-buthyl, 10: clorimuron-ethyl+lactofen+fluazyphop-pbuthyl, 11: capina+fluazyphop-p-buthyl, 12: testemunha capinada e 13: testemunha sem capina). Aos 07, 15 e 30 dias após a aplicação (DAA) foram realizadas avaliações visuais de intoxicação na cultura e aos 15 e 30 DAA avaliações de controle das espécies presentes na área. Por ocasião da colheita, determinou-se a produtividade em Kg ha-¹. As duas variedades comportaram-se de forma semelhante com relação à seletividade dos herbicidas. As estratégias 2, 9 e 10 causaram morte das plantas de feijão-caupi, enquanto que as misturas 7 e 8 causaram intoxicação severa na cultura, ocasionando aumento do ciclo e redução na produtividade, já as estratégias de controle 1, 3, 4, 5, e 6 causaram apenas sintomas leves de intoxicação na cultura. As principais espécies de plantas infestantes foram Tallinum paniculatum, Cleome affinis, Amaranthus spinosus e Commelina bengalensis, sendo todas controladas com eficiência pelas misturas 5 e 6. Já as estretégias 1, 4 e 5 não exerceram controle eficiente. Assim, os herbicidas das estratégias 1, 3, 4, e 5 foram seletivos para a cultura do feijão-caupi.CONAC 2012. Disponível em: http://www.conac2012.org/resumos/pdf/185a.pdf. Acesso em: 06 ago. 2013

Enological potential of 'Pinot Noir' grape and wine from a tropical climate, in the Chapada Diamantina - BA, Brazil.

Tropical viticulture, although relatively new, has achieved significant technological developments in Brazil, making possible cultivation of vines in areas beyond standard traditional winegrowing areas worldwide. Techniques such as irrigation, the use of growth hormones in vines and production control at different times during the year, are being applied in other regions of Northeast Brazil for the production of wines. Some varieties express the best of their viticultural and enological potential in a given ecosystem, and Pinot Noir variety is very difficult to produce because presents a high susceptibility to fungal diseases (Reynier, 2007)

Advanced oxidation of organic matter in natural waters with TiO2 immobilized films

The purpose of this paper is to report the development of a laboratory -scale pilot based on the use of TiO2 photocatalytic thin films for degrading organic matter and pollutants from natural water. The photoreactor consists of a channel inclined with a glass plate coated by TiO2 in both faces and fixed at 1 cm from the bottom. The thin film was immobilized on the glass plates by Sputtering technique. The reactor was designed to be able of reproduce the hydraulic conditions of a water treatment plant. In experimental testing of degradation of organic matter with solar irradiation maximum efficiency of 50% was achieved. At optimal conditions it was possible to exceed the efficiencies of a full scale preozonization in a water treatment plant , thus providing a more sustainable process

Enological characteristics of ?Chardonnay? grapes produced in tropical climate in the Northeastern of Brazil.

The climate has very strong influence on the vine performance, being the main factor to determine the potentiality of wine from a new region. There is also interactions among wine quality and other factors, such as soil, variety and the management adopted in the vineyard. In tropical climates, as in the São Francisco Valley (VSF), located at 350 m of elevation and 9º S of latitude, vines grown continuously, and with the use of specific technologies, it is possible to have two harvests per year in the same vineyar