1,720,961 research outputs found
Recomendaciones de manejo de Diloboderus abderus (Coleoptera: Melolonthidae) en trigo.
Get PDFDurante el verano de la campaña agrícola 2017-2018 se detectó, en la zona central de Córdoba, una importante actividad de adultos de Diloboderus abderus, conocido comúnmente como “bicho torito”. Esto es un primer indicio de que podrían existir lotes con larvas de este insecto, las cuales tienen hábitos subterráneos y pueden provocar daños de importancia a cultivos como trigo, maíz, alfalfa, etc. Teniendo en cuenta la proximidad de la siembra de trigo, es sumamente importante realizar muestreos previos para registrar la presencia y densidad poblacional de la plaga. Esto permitirá, frente a poblaciones superiores al umbral de daño económico,
tomar decisiones de manejo culturales y/o químicas objetivas, tendientes a evitar o disminuir los potenciales daños al cultivo.EEA Manfredi.Fil: Fava, Fernando Daniel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Grupo Protección Vegetal; Argentin
Aspectos agronómicos: Capítulo 10. Identificación y control de plagas
No full textLa alfalfa atrae a un sinnúmero de artrópodos que encuentran condiciones favorables para establecerse en el cultivo, al que utilizan directamente como alimento o para oviposición. Entre ellos se encuentra el caso de los insectos fitófagos que en pequeño número asumen la categoría de plagas. Por otro lado, el cultivo también es habitado por predadores y parasotoides que lo usan como refugio y como fuente de recursos para su manutención. En Argentina, por ejemplo, del 80 al 90% del daño provocado por plagas es causado por solo cuatro grupos de insectos (ARAGÓN; IMWINKELRIED, 2007). En los Estados Unidos se han mencionado más de 1.000 especies de artrópodos en la alfalfa, aunque poco menos de 20 causan daños económicos (SUMMERS et al., 2007).EEA ManfrediFil: Silva, Alessandra de Carvalho. Embrapa Agrobiología; BrasilFil: Bueno, Vanda Helena Paes. Universidad Federal de Lavras; BrasilFil: Fava, Fernando Daniel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentin
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
(Blanchard) (Coleoptera: Scarabaeidae: Melolonthinae) in Argentinian crops and the first report of damage on soybean
No full textLiogenys Guérin-Méneville is one of the most species rich genera in the Scarabaeidae family endemic to South America. Some species of this genus are important root-feeding pests of maize, soybean, wheat and oat in their larval stage. Prior to the present study, all known reports of damage caused by any Liogenys species were from Brazil. Since 2006 in Argentina white grubs of the genus Liogenys (not previsouly identified to species level) have been recorded causing a decrease in soybean yields. This research confirms that the Argentinian species is L. suturalis (Blanchard), an important pest already recorded in Brazil but associated with yield losses of maize crops instead of soybean. Taxonomical and biological data observed in Argentinian populations are presented. This is the first record of L. suturalis damaging soybean and its first report in Argentinian crops.Fil: Cherman, Mariana Alejandra. Universidade Federal de Mato Grosso; BrasilFil: Mojica, Noelia. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Fava, Fernando Daniel. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: del Valle, Eleodoro Eduardo. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Ciencias Agropecuarias del Litoral. - Universidad Nacional del Litoral. Instituto de Ciencias Agropecuarias del Litoral.; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentin
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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