Artículos, informes y presentaciones en Congresos
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Examinando Artículos, informes y presentaciones en Congresos por Autor "Achinelly, María Fernanda"
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Acceso Abierto Biodiversity of entomonematodes parasitizing soil pest white grubs (Scarabaeidae) of Buenos Aires, Argentina(2014) Camino, Nora Beatriz; Achinelly, María Fernanda; Rusconi, José Matías; Eliceche, Daiana; Salas, AugustoThis work was carried out between 2006-2010 in wheat fields of the Pampas, Argentina, in order to determine species of nematode parasites and pathogens of white grubs, soil major pest. Samples were taken with shovel in randomly selected sites. Nymphs of Diloboderus abderus and Cyclocephalla signaticollis (Scarabaeidae) were collected. Thirteen species of nematodes belonging to 5 families (Mermithidae, Thelastomatidae, Travassonematidae, Diplogasteridae and Rhabditidae) were determined. The richness species values were 1 for Cyclocephalla signaticollis and 12 for Diloboderus abderus. The thelastomatids and rhabdítids were the largest group of nematodes, with a total of 3 species each. The thelastomátids were very prevalent with infections exceeded 60%, followed by diplogasterids which reached 36%. The mermítids were less prevalent with values close to 10%. The family Travossonematidae was the one with the lowest abundance (0.32). Knowledge of nematode community will be a great ability to interpret host-parasite relationships and in many cases determine those species pest potential bioreguladoras important agents in agricultural areas of Argentina. This study provides for the first time to the Pampas region of our country a list of white worms parasitic nematodes. - Artículo
Acceso Abierto Nematodes (Mermithidae) parasitizing grasshoppers (Orthoptera: Acrididae) in the Pampean region, Argentina(2017) Rusconi, José Matías; Camino, Nora Beatriz; Achinelly, María FernandaThis work provides the results of a survey of entomonematodes parasites of grasshoppers in grasslands of the Pampean Region, Argentina. Nymphs of Staurorhectus longicornis Giglio-Tos, Laplatacris dispar Rhen, 1939, Dichroplus elongatus Giglio-Tos, 1894 and Metaleptea brevicornis (L.) (Orthoptera: Acrididae) were collected. Mermithidae was the only family registered with seven species: Agamermis decaudata Cobb, Steiner and Christie, 1923, Amphimermis bonaerensis Miralles and Camino, 1983, Amphimermis dichroplusi Camino and Lange, 1997, Amphimermis ronderosi Camino and Lange, 1997, Hexamermis coclhearius Stock and Camino, 1992, Hexamermis ovistriata Stock and Camino, 1992, and Longimermis acridophila Camino and Stock, 1989. The values of parasitism ranged between 1-12%, and intensity not overcome the number of 5.0 nematodes per larva. The nematodes observed showed specificity, not registering the same species of parasite in more than one host species. The Pampean region constituted an area with high diversity of mermithids where new species could be consider as bioregulator agents of this troublesome insect pests in agricultural areas of Argentina. - Artículo
Embargado Population dynamics between the mermithid Strelkovimermis spiculatus (Nematoda: Mermithidae) and the floodwater mosquito Ochlerotatus albifasciatus (Diptera: Culicidae) over time(Elsevier, 2012) María V. Micieli, Paula Risso, María F. Achinelly , M. de los Milagros Villar, Evangelina Muttis; Micieli, María Victoria; Risso, Paula; Achinelly, María Fernanda; Villar, María de los Milagros; Muttis, EvangelinaWe investigated the population dynamics of Strelkovimermis spiculatus in Ochlerotatus albifasciatus to determine the abiotic and biotic parameters involved in this host-parasite system. Weekly samplings performed from May 2007 through May 2010 in three ponds located in open areas of La Plata, Argentina revealed that parasitism by S. spiculatus in O. albifasciatus occurred throughout all seasons with differences in effectiveness among breeding habitats: A mosquito-larva reduction of 80.7% was observed in a habitat where 100% of the generations were infected by nematodes; an intermediate situation (a 41.9% reduction) involved a lower percentage of parasitism above 50% although nematode infection was likewise registered in 92.9% of the generations. Finally, a mosquito-larva reduction of 2.68% was recorded where only 46.0% of the generations were parasitized and at levels of nematode infection below 50%. We analyzed the effects of abiotic and biotic parameters on S. spiculatus infections. The floodedsurface area was the only variable significantly associated with percent infection. Infection prevalence correlated positively with the mean number of emerged nematodes per larva and with the S. spiculatus male-to-female ratio in each parasitized-mosquito generation. In conclusion, the frequency over time and levels of infection are key parameters in the regulation of mosquito populations by this mermithid