First evidence of resistance to pyrethroid insecticides in Italian Aedes albopictus populations 26 years after invasion          下载免费PDF全文

Verena Pichler  Romeo Bellini  Rodolfo Veronesi  Daniele Arnoldi  Annapaola Rizzoli  Riccardo Paolo Lia  Domenico Otranto  Fabrizio Montarsi  Sara Carlin  Marco Ballardini  Elisa Antognini  Marco Salvemini  Emanuele Brianti  Gabriella Gaglio  Mattia Manica  Pietro Cobre  Paola Serini  Enkelejda Velo  John Vontas  Ilias Kioulos  Joao Pinto  Alessandra della Torre  Beniamino Caputo 《Pest management science》2018,74(6):1319-1327

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Beech coppice conversion to high forest: results from a 31-year experiment in Eastern Pre-Alps     

Barbara Mariotti  Giorgio Alberti  Alberto Maltoni  Andrea Tani  Pietro Piussi 《Annals of Forest Science》2017,74(2):44

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Variation in resistance to the grain aphid, Sitobion avenae (Sternorhynca: Aphididae), among diploid wheat genotypes: Multivariate analysis of agronomic data     

J. P. di Pietro  C. M. Caillaud    B. Chaubet    J. S. Pierre  M. Trottet 《Plant Breeding》1998,117(5):407-412

A collection of 87 ancient wheat genotypes, 67 Triticum monococcum, 13 Triticum boeoticum, seven Triticum urartu and one cultivar of the modern wheat Triticum aestivum (variety ‘Arminda’) were evaluated for resistance to the cereal aphid Sitobion avenae, the main damaging aphid pest on winter wheat in Europe. The intrinsic rate of natural increase (r_m), which is regarded as a good estimate of the fitness of an aphid population, was used as an indicator for the level of plant resistance. Differentiation of the 88 plant genotypes into four distinct groups was achieved with a cluster analysis of the r_m values. The modern wheat ‘Arminda’ was more susceptible than any of the ancient wheat genotypes tested (r_m= 0.24, i.e. the aphid population doubled every 2.6 days). A second group of 19 plants ranged from relatively susceptible to moderately resistant (0.17 < r_m < 0.21). Fifty–one plants were allocated to a third group and classified as resistant (0.09 < r_m < 0.16). The last group contained 17 genotypes with a high level of resistance where aphid fitness was greatly reduced (0.02 < r_m < 0.09, i.e. the aphid population doubled every 11.4 days or 7.7 days, respectively). Clustering of the accessions into the different phenetic groups did not follow the geographical origin of the wheat genotypes or the species to which they belong. These results show that ancient diploid wheats, all characterized by the genome A, present considerable interest for plant breeding for resistance to S. avenae in modern wheat. The potential use of these strong and partial sources of resistance for introduction of a stable and durable form of resistance to S. avenae in wheat is discussed.  相似文献   

Great Recession and club convergence in Europe: A cross-country,cross-region panel analysis (2000–2015)     

Fabio Mazzola  Pietro Pizzuto 《Growth and change》2020,51(2):676-711

The paper aims at investigating the impact of the Great Recession on per capita GDP convergence process across European regions and countries. Using the time-varying factor model developed by Phillips and Sul for the period 2000–2015 and two different merging procedures to identify clubs, we provide evidence of the diverging impact of the Great Recession “between” the higher and the lower convergence clubs at both regional and country levels as well as of the strengthening of the convergence process “within” most clubs. In addition, we add further evidence to the common belief of a “multi-speed” Europe by contrasting Eastern European countries' and regions' behavior vis-à-vis original European members' one, and by identifying the factors that affect club membership and resilience to the recent economic downturn. We find that the membership in the higher clubs and resilience to the Great Recession are positively affected by the presence of several local-specific factors and macroeconomic characteristics.  相似文献   

Is the use of turmeric in the diet safe for fish?          下载免费PDF全文

Pollyanna de Moraes França Ferreira  Suellen Silva Condessa  Juliana Silva Rocha  Débora Werneck Caldas  Juliana Rodrigues Gomes  Maria Tatiana Soares  Alex Junio Silva Cardoso  Jener Alexandre Sampaio Zuanon 《Aquaculture Research》2017,48(9):4623-4631

With this study, we aimed to assess the safety of using Curcuma longa in fish feed. Juvenile Astyanax aff. bimaculatus (0.83 ± 0.04 g) were kept in 24 80‐L aquaria, at a density of 0.5 fish L^?1 for 60 days. Six diets supplemented with 0.0, 20.0, 40.0, 60.0, 80.0 and 100.0 g kg^?1 were evaluated. Histopathological analysis of the gills showed that there was an increasing linear effect of turmeric on the frequency of lamellar aneurysm, hypertrophy of mucous cells, oedema and necrosis. There was a quadratic effect of turmeric supplementation on the frequency of fusion and disruption of secondary lamellae, vacuolation and hypertrophy of the epithelial cells, and the estimated values to minimize these variables were 4.63, 25.93 and 24.46 g kg^?1 respectively. There was a quadratic effect of turmeric on the gills index (I_BRA), and the estimated value to minimize this index was 30.23 g kg^?1. No effect of turmeric on the frequency of histopathological changes and organ index in fish liver was observed. Thus, we conclude that turmeric is not hepatotoxic for A. aff. bimaculatus; however, its use is safe at concentrations up to 30.23 g kg^?1 diet as a function of its gill toxic effect at higher doses.  相似文献   

Curcuma longa supplementation in the diet of Astyanax aff. bimaculatus in preparation for transport          下载免费PDF全文

Pollyanna de Moraes França Ferreira  Juliana Silva Rocha  Juliana Rodrigues Gomes  Débora Werneck Caldas  Maria Tatiana Soares Martins  Jerusa Maria de Oliveira  Ana Lucia Salaro  Jener Alexandre Sampaio Zuanon 《Aquaculture Research》2017,48(8):4524-4532

The physiological state of fish before transportation is an important aspect to be observed when reduction in losses due to mortality is aimed. Various preparative procedures for transport are reported, but little is known about the use of additives in fish diet. In this study, we aimed to evaluate the effect of dietary turmeric (Curcuma longa) supplementation on the tolerance of juvenile Astyanax aff. bimaculatus to transportation stress. The experimental design consisted of six treatments: 0, 20, 40, 60, 80 and 100.0 g kg^?1 turmeric. Fish weighing 0.83 ± 0.04 g were distributed in 24 80‐L aquaria at a density of 0.5 fish L^?1 and were fed to satiation three times a day for 60 days. After this period, fish were transported for 24 h in plastic bags (15 fish per bag). Using a discontinuous linear response plateau (LRP) model, the lowest estimated concentration of turmeric that maximized the survival rate was 16.67 g kg^?1. Quadratic effects of turmeric on blood lactate levels were observed, and the estimated concentration of turmeric required to minimize blood lactate levels was 64.7 g kg^?1. We observed quadratic effects of turmeric on superoxide dismutase activity and the concentration of malondialdehyde in fish gills and the turmeric concentrations required to minimize the transport stress effects on these variables were 42.50 and 83.33 g kg^?1, respectively. Thus, dietary supplementation with turmeric enhanced the tolerance of juvenile A. aff. bimaculatus to transportation stress.  相似文献   

<Emphasis Type="Italic">Curcuma longa</Emphasis> as additive in the diet for <Emphasis Type="Italic">Astyanax aff. bimaculatus</Emphasis>     

Pollyanna de Moraes França Ferreira  Maria Tatiana Soares Martins  Débora Werneck Caldas  Juliana Rodrigues Gomes  Jerusa Maria de Oliveira  Ana Lucia Salaro  Juliana Silva Rocha  Jener Alexandre Sampaio Zuanon 《Fish physiology and biochemistry》2017,43(3):691-702

The aim of the present study was to evaluate the effect of turmeric (Curcuma longa) as additive in the diet for Astyanax aff. bimaculatus. Fish (0.83 ± 0.04 g) were fed, for 60 days, with six diets containing 0.0, 20.0, 40.0, 60.0, 80.0, and 100.0 g turmeric kg^?1 feed. There was an increasing linear effect of turmeric on the thickness of the muscular layer, and height and width of the folds of the intestine. In the liver, a quadratic effect was observed of turmeric on the percentage of hepatocyte cytoplasm and a decreasing linear effect on the percentage of sinusoid capillaries. A quadratic effect was also observed of turmeric on the liver glycogen. There was no effect of turmeric on the antioxidant activity in the liver, carcass composition or productive performance of the fish. Thus, we concluded that Curcuma longa has trophic effects on the epithelium and the muscular layer of the intestine of A. aff. bimaculatus. Additionally, low levels of Curcuma longa cause increased deposition of liver glycogen and high levels cause reduction.  相似文献