Abundance and Species Richness of Leafhoppers and Planthoppers (Hemiptera: Cicadellidae and Delphacidae) in Brazilian Maize Crops

Fil: De Oliveira, Charles Martins. Embrapa Cerrados. Planaltina. Brasília/DF; BrazilFil: De Oliveira, Elizabeth. Embrapa Milho e Sorgo. Sete Lagoas/MG; BrazilFil: Prazeres De Souza, Isabel Regina. Embrapa Milho e Sorgo. Sete Lagoas/MG; BrazilFil: Alves, Elcio. DuPont do Brazil S.A. DivisÆo Pioneer Sementes. Itumbiara/GO; BrazilFil: Dolezal, William. Pioneer Hi-Bred International. Itumbiara/GO; BrazilFil: Paradell, Susana Liria. División Entomología. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Marino de Remes Lenicov, Ana María. División Entomología. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Frizzas, Marina Regina. Universidade de Brasília. Departamento de Zoologia. Instituto de Ciências Biológicas. Brasília/DF; Brazi

Variaciones estacionales e históricas de las especies ícticas de la laguna Chascomús

In the last five decades the ictiofauna of Chascomús Shallow lake has been studied in quite detail. Between 1999 and 2000 monthly samples of fish with fyke nets were taken. Thus obtaining the cuali-quantitative composition of each sample taken. These were used to assess the variations between sites and seasons of the year. Among the 17 species caught Porteño, pejerrey and sabalito were present in all the samples taken, wichwere dominant and wich represented 51%, 24% and 14% of the total number respectively, and 28% 10% and 37% in weight. Their composition was similar in all stations sampling at every date. Notwithstanding this differences between abundance (CPUEn) and the extracted biomass (CPUEw) were observed. The capture by unit of total effort decreased from winter to autumn. The average (CPUEw) for Chascomús was above the values corresponding to 47 samples taken in different water bodies from Buenos Aires pampas. Comparing the results with the obtained historical data throughout 40 years it was observed that the percentage of the planctophagous species, pejerrey and mandufia marked a declining tendency. On the other handthe biomass of the porteño and sabalito showed a market increase. Significant correlations between these changes and the antropogénic impact were observed.Instituto de Limnología "Dr. Raúl A. Ringuelet

Variaciones estacionales e históricas de las especies ícticas de la laguna Chascomús

In the last five decades the ictiofauna of Chascomús Shallow lake has been studied in quite detail. Between 1999 and 2000 monthly samples of fish with fyke nets were taken. Thus obtaining the cuali-quantitative composition of each sample taken. These were used to assess the variations between sites and seasons of the year. Among the 17 species caught Porteño, pejerrey and sabalito were present in all the samples taken, wichwere dominant and wich represented 51%, 24% and 14% of the total number respectively, and 28% 10% and 37% in weight. Their composition was similar in all stations sampling at every date. Notwithstanding this differences between abundance (CPUEn) and the extracted biomass (CPUEw) were observed. The capture by unit of total effort decreased from winter to autumn. The average (CPUEw) for Chascomús was above the values corresponding to 47 samples taken in different water bodies from Buenos Aires pampas. Comparing the results with the obtained historical data throughout 40 years it was observed that the percentage of the planctophagous species, pejerrey and mandufia marked a declining tendency. On the other handthe biomass of the porteño and sabalito showed a market increase. Significant correlations between these changes and the antropogénic impact were observed.Instituto de Limnología "Dr. Raúl A. Ringuelet

Variaciones estacionales e históricas de las especies ícticas de la laguna Chascomús

In the last five decades the ictiofauna of Chascomús Shallow lake has been studied in quite detail. Between 1999 and 2000 monthly samples of fish with fyke nets were taken. Thus obtaining the cuali-quantitative composition of each sample taken. These were used to assess the variations between sites and seasons of the year. Among the 17 species caught Porteño, pejerrey and sabalito were present in all the samples taken, wichwere dominant and wich represented 51%, 24% and 14% of the total number respectively, and 28% 10% and 37% in weight. Their composition was similar in all stations sampling at every date. Notwithstanding this differences between abundance (CPUEn) and the extracted biomass (CPUEw) were observed. The capture by unit of total effort decreased from winter to autumn. The average (CPUEw) for Chascomús was above the values corresponding to 47 samples taken in different water bodies from Buenos Aires pampas. Comparing the results with the obtained historical data throughout 40 years it was observed that the percentage of the planctophagous species, pejerrey and mandufia marked a declining tendency. On the other handthe biomass of the porteño and sabalito showed a market increase. Significant correlations between these changes and the antropogénic impact were observed.Instituto de Limnología "Dr. Raúl A. Ringuelet

Difusión del Corn Stunt Spiroplasma del maíz (Spiroplasma kunkelii) y del vector (Dalbulus maidis) en la República Argentina

Among the most important diseases that affect the corn crops (Zea mays L.) is “Corn Stunt Spiroplasm” (CSS). It is caused by Spiroplasm kunkelii and transmitted by a cicadelid Dalbulus maidis (De Long & Wolcott, 1923), the only vector known up to the present in Argentina. Corn crop were monitored in 10 provinces of Argentina during 1991/1992, 1994/1995, 1996/2000. This provided information about the growth of this disease since its detection in the year 1990/1991 up to the present in Argentina as well as the distribution of D. maidis, its vector. The detection of the pathogen was performed on plants with symptoms that are characteristic of CSS using the technique of NC-ELISA. The vector was captured by sweeping plants of corn with symptoms. A increase in the areas affected by CSS was shown in the provinces of Jujuy, Salta, Tucumán, Catamarca, Chaco, Corrientes and Santiago del Estero as well as its recent detection in the provinces of Córdoba, San Luis and La Pampa. Based on the 83 places monitored, D. maidis was present in 80 % of the samples and the pathogen was detected in 96%. In the provinces Corrientes, Córdoba, San Luis and La Pampa, D. maidis was not registered.Entre las enfermedades más importantes que afectan al cultivo de maíz (Zea mays L.), se encuentra el achaparramiento o Corn Stunt Spiroplasma (CSS), causado por Spiroplasma kunkelii, trasmitido por el cicadélido Dalbulus maidis (De Long & Wolcott, 1923), único vector conocido hasta el presente en Argentina. Sobre la base de monitoreos realizados en lotes cultivados de maíz en 10 provincias de Argentina durante las campañas 1991/1992; 1994/1995; 1996/2000 se aporta información de esta enfermedad y del agente vector desde su detección en el año 1990/1991. La identificación del patógeno se realizó sobre plantas con síntomas característicos del CSS mediante la técnica de NCELISA. La presencia del vector se registró mediante capturas con red entomológica de arrastre sobre plantas de maíz con síntomas. Se demostró un incremento de la superficie afectada por el Corn Stunt Spiroplasma en las provincias de Jujuy, Salta, Tucumán, Catamarca, Chaco, Corrientes, Santiago del Estero y la reciente aparición en las provincias de Córdoba, San Luis y La Pampa. De las 83 localidades monitoreadas, D. maidis estuvo presente en 80 % de las localidades y en 96% se detectó el patógeno. En las provincias de Corrientes, Córdoba, San Luis y La Pampa no se registró a D. maidis

OA011-03. Clusterin, a natural ligand of DC-SIGN present in human semen inhibits HIV capture and transmission by dendritic cells

International audiencen.

Inventory of some families of Hemiptera, Coleoptera (Curculionidae) and Hymenoptera associated with horticultural production of the Alto Valle de Río Negro and Neuquén provinces (Argentina)

The knowledge of the entomological fauna in productive systems is important for the agroecological management since beneficial insects are a key resource for pest management in horticultural systems. Scientific information on the biodiversity present in a given area is essential as well as the ecological function and/or feeding habits of the insects. In Alto Valle de Río Negro and Neuquén, horticultural production systems can be described as highly dependent on chemical inputs for pest management and fertilization. The aim of this study is to carry out an inventory of the biodiversity of some families of Hemiptera, Coleoptera (Curculionidae) and Hymenoptera present in peri-urban and rural farms located in Neuquén and Río Negro, respectively. Insects were collected through pitfall and sweeping net on tomato and pepper crops and the surrounding non-cultivated areas. Idiosystatus Berg (Auchenorrhyncha) was cited for the first time from Argentina. Species cited for the first time from Neuquén: Hemiptera: Auchenorrhyncha: Acanalonia chloris (Berg), Syncharina punctatissima (Signoret), Amplicephalus dubius Linnavuori, Exitianus obscurinervis (Stål), Agalliana ensigera Oman and Bergallia signata (Stål); Hemiptera: Heteroptera: Harmostes (Harmostes) prolixus Stål and Atrachelus (Atrachelus) cinereus (Fabricius); Coleoptera: Curculionidae: Hypurus bertrandi (Perris), Naupactus leucoloma Boheman, Otiorhynchus rugosostriatus (Goeze) and Sitona discoideus Gyllenhal and Hymenoptera: Xylocopa (Neoxylocopa) augusti Lepeletier and Pseudagapostemon (Neagapostemon) singularis Jörgensen. Species cited for the first time from Río Negro: Hemiptera: Auchenorrhyncha: Amplicephalus dubius Linnavuori, Amplicephalus marginellanus Linnavuori, Circulifer tenellus (Baker) and Xerophloea viridis (Fabricius); Hemiptera: Heteroptera: Tupiocoris cucurbitaceus (Spinola), Atrachelus (Atrachelus) cinereus (Fabricius), Dichelops furcatus (Fabricius) and Harmostes (Harmostes) prolixus Stål; Coleptera: Curculionidae: Naupactus xanthographus (Germar) and Hymenoptera: Diadasia pereyrae (Holmberg) and Dialictus autranellus (Vachal).El conocimiento de la fauna entomológica presente en los sistemas productivos es importante para el manejo agroecológico ya que los insectos beneficiosos son un recurso clave para el manejo de plagas en los sistemas hortícolas. Es esencial contar con información científica sobre la biodiversidad presente en un área determinada y la función ecológica y/o los hábitos alimenticios de los insectos. En el Alto Valle de Río Negro y Neuquén, los sistemas de producción hortícola pueden describirse como altamente dependientes de los insumos químicos para el manejo de plagas y fertilización. El objetivo de este estudio es realizar un inventario de la biodiversidad de algunas familias de Hemiptera, Coleoptera (Curculionidae) e Hymenoptera presentes en las chacras periurbanas y rurales ubicadas en Neuquén y Río Negro, respectivamente. Los insectos fueron recolectados a través de trampas de caída y red entomológica en cultivos de tomate y pimiento, y áreas circundantes no cultivadas. Idiosystatus Berg (Auchenorrhyncha) fue citado por primera vez en Argentina. Especies citadas por primera vez en Neuquén: Hemiptera: Auchenorrhyncha: Acanalonia chloris (Berg), Syncharina punctatissima (Signoret), Amplicephalus dubius Linnavuori, Exitianus obscurinervis (Stål), Agalliana ensigera Oman y Bergallia signata (Stål); Hemiptera: Heteroptera: Harmostes (Harmostes) prolixus Stål y Atrachelus (Atrachelus) cinereus (Fabricius); Coleoptera: (Curculionidae): Hypurus bertrandi (Perris), Naupactus leucoloma Boheman, Otiorhynchus rugosostriatus (Goeze) y Sitona discoideus Gyllenhal e Hymenoptera: Xylocopa (Neoxylocopa) augusti Lepeletier and Pseudagapostemon (Neagapostemon) singularis Jörgensen. Especies citadas por primera vez en Río Negro: Hemiptera: Auchenorrhyncha: Amplicephalus dubius Linnavuori, Amplicephalus marginellanus Linnavuori, Circulifer tenellus (Baker) y Xerophloea viridis (Fabricius); Hemiptera: Heteroptera: Tupiocoris cucurbitaceus (Spinola), Atrachelus (Atrachelus) cinereus (Fabricius), Dichelops furcatus (Fabricius) y Harmostes (Harmostes) prolixus Stål; Coleoptera: Curculionidae: Naupactus xanthographus (Germar) e Hymenoptera: Diadasia pereyrae (Holmberg) y Dialictus autranellus (Vachal).Área Investigación y Desarrollo Tecn. Agricultura Familiar - Región PatagoniaFil: Alvarez, Leopoldo Jesus. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Bernardis, Adela M. Universidad Nacional del Comahue. Facultad de Ciencias del Ambiente y la Salud; ArgentinaFil: Defea, Bárbara Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; ArgentinaFil: Dellapé, Pablo Matías. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil. Del Río, Maria Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; ArgentinaFil: Gittins Lopez, Cecilia Gabriela. Instituto Nacional Tecnología Agropecuaria (INTA). Área Investigación y Desarrollo Tecn. Agricultura Familiar - Región Patagonia; ArgentinaFil: Lanteri, Analía A. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: López Armengol, María Fernanda. Universidad Nacional del Comahue. Facultad de Ciencias del Ambiente y la Salud; Argentina. Instituto Nacional Tecnología Agropecuaria (INTA). Área Investigación y Desarrollo Tecn. Agricultura Familiar - Región Patagonia; ArgentinaFil: Marino de Remes Lenicov, Ana María. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Minghetti, Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Paradell, Susana Liria. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC PBA); ArgentinaFil: Rizzo, Maria Estefania. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

A new genus and species of Delphacini (Hemiptera: Fulgoroidea: Delphacidae) from Argentina

Marino De Remes Lenicov, A. M., Varela, G. (2014): A new genus and species of Delphacini (Hemiptera: Fulgoroidea: Delphacidae) from Argentina. Zootaxa 3861 (2): 177-184, DOI: http://dx.doi.org/10.11646/zootaxa.3861.2.