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Garcia A.,University of Lisbon | Figueiredo E.,University of Lisbon | Valente C.,RAIZ Institute Investigacao da Floresta e Papel | Monserrat V.J.,Complutense University of Madrid | Branco M.,University of Lisbon
Bulletin of Insectology | Year: 2013

The Eucalyptus pest Thaumastocoris peregrinus Carpintero et Dellape, (Hemiptera Thaumastocoridae) was found in a Eucalyptus arboretum in Lisbon, Portugal, in April 2012. This is the first report for this species in Western Europe. Separate surveys were conducted to assess the geographical distribution, host plant susceptibility and natural enemies of T. peregrinus. To ascertain the geographical distribution of T. peregrinus surveys were conducted between May and June 2012 at 53 sites in central and southern Portugal. T. peregrinus was present in only three sites, which were all located in Lisbon and surrounding areas suggesting an introduction pathway through the harbors or the airport in this coastal city. Of the 30 Eucalyptus species present in Lisbon's Eucalyptus arboretum, 14 were confirmed as infested by T. peregrinus during the first survey in April 2012. In August 2012 the host range had increased to 19 Eucalyptus species, revealing an expansion phase. We report the first record of Hemerobius bolivari Banks (Neuroptera Hemerobiidae), a native of South America, preying on T. peregrinus nymphs. This is the first record of H. bolivari in Europe and we hypothesized that this predator may have reached Europe together with its prey. Source


Saraiva M.S.,University of Coimbra | Gamelas J.A.F.,University of Coimbra | De Sousa A.P.M.,RAIZ Institute Investigacao da Floresta e Papel | Reis B.M.,RAIZ Institute Investigacao da Floresta e Papel | And 2 more authors.
Materials | Year: 2010

A new approach for the chemical modification of the surface of paper based on the application of colloidal mixtures containing cationic starch and polyoxometalates on uncoated base paper is presented. Polyoxometalates with the Keggin-type structure and physical properties similar to those presented by coating pigments, namely H3PW12O40·23H2O, H4SiW12O40·24H2O, and K7PW11O39·9H2O, have been used in order to improve the quality of inkjet printing. The analysis of the different samples by FTIRATR spectroscopy showed the presence of the polyoxometalates (and the cationic starch) on the top surface of the paper. In addition, the determination of surface energy parameters, namely the polar component (σs p) and the dispersive component (σs d) of the surface energy, by contact angle measurements revealed that, for the new samples, the polar component level was much higher than that of the uncoated base paper. The quality of inkjet printing, evaluated by parameters such as the gamut area and the optical density, was considerably improved by these surface treatments. © 2010 by the authors. Source

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