1,721,119 research outputs found
Acari Eriophyoidea: alcune caratteristiche rilevanti per il controllo biologico delle piante infestanti.
No full textThe main morphological, biological and ecological aspects making the Eriophyoid mites highly effective against the weedy plants are briefly reviewed. Obstacles and interferences for correct species identification and survey are summarized. Challenging research topics requiring further deep investigations are pointed out
Phytoseiid mites (Acari: Mesostigmata) from Apulia (Southern Italy), with a key to the species reported from Italy
No full textThe objective of this paper is to provide a taxonomic appraisal of the phytoseiids mainly from Apulia, Italy, through the examination of 1055 specimens collected in the areas of that district. Reports of occasional collection in Basilicata and Molise areas are also listed (16 specimens). The mite specimens were collected on the main cultivated and ornamental plants, and on spontaneous plants as well. Complementing the morphological characterization of the species collected is provided. This is the first wide report survey on the phytoseiid fauna in Apulian territories. This study reports on nine new records of Phytoseiidae for Apulia region (Southern Italy). Typhlodromus (Typhlodromus) exhilaratus Ragusa was the most frequent or abundants species sampled. Also, some other species, i.e. Phytoseiulus persimilis Athias-Henriot and Amblyseius swirskii Athias-Henriot, were collected and are potential taxa for biocontrol. In addition, a dichotomous key to separate phytoseiid mite species listed from Italy was provided
Preventative approach to microbial control of capnodis tenebrionis by soil application of metarhizium brunneum and beauveria bassiana
Full text linkManagement of the Mediterranean flat-headed root-borer, Capnodis tenebrionis, is critical due to the larvae’s root localization. Neonate larvae can be exposed to natural enemies before penetrating the roots. Application of Metarhizium brunneum strain Mb7 and Beauveria bassiana strain GHA formulations on rice granules was investigated for their efficacy against C. tenebrionis larvae. Mb7 application, evaluated on apricot twigs, significantly and dose-dependently reduced colonization rates of neonates, with highest mortality at 108 conidia/g soil. Neonate susceptibility to Mb7 and GHA was evaluated on potted rootstocks (GF677 almond × peach, 2729 plum) planted in entomopathogenic fungi (EPF)-premixed soil (1.3–1.6 × 105 conidia/cm3 soil) or in EPF-free soil surface-treated with 5 g Mb7 fungal granules (1.25 × 109 conidia). Larval colonization rates were reduced 7.4-fold in 2729 by both fungi; only Mb7 completely prevented colonization of GF677 by larvae. Larvae inside plant galleries exhibited mycosis with EPF-treated soils and both fungi proliferated on larval frass. Mb7 conidia germinated in the rhizosphere of GF677, and conidia of both fungi remained viable throughout the trial. Galleria baiting technique was used on EPF-treated soil to evaluate EPF infectivity over time; Mb7 and GHA persisted 180 and 90 days post inoculation, respectively. The formulation (fungus-covered rice grains), delivery method (mixing with soil) and persistence (3–6 months) of Mb7 and GHA are feasible for potential field application to control C. tenebrionis
Controllo biologico del Capnodis tenebrionis (buprestide delle rosacee). Note preliminari
No full textAttuali conoscenze degli Eriofioidei vettori di Virus.
No full textOnly a small number of diseases have been confirmed to be caused by virus species transmitted by eriophyid mites; many others have uncertain aetiology and the involvement of a virus is suspected. Many eriophyid species produce symptoms which may be confused with viral diseases or hide virus infections not identified yet. The development of biotechnologies and their continuous updating and improvements could allow a larger detection of virus entities. The purpose of the present review is to describe the current state of knowledge on the eriophyid and plant virus interactions pointing out the weak points of these investigations
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“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
Full text linkWe 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
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