Search results for " pest"
showing 10 items of 253 documents
La pedagogia nell'età moderna
2022
This chapter presents the pedagogical reflection of some authors of the modern age, Comenius, Rousseau, Pestalozzi, Herbart, the Positivists, who contributed to building an identity of pedagogical knowledge as a knowledge independent of philosophy.
Lezione 9 – Breve storia dell’epistemologia pedagogica moderna
2017
In questa Lezione vengono tracciate le tappe più significative del cammino che la pedagogia ha percorso nella modernità per essere riconosciuta come sapere autonomo. Fra il Seicento e l’Ottocento il sapere pedagogico era ancora assimilato al modello speculativo-sistematico e il suo codice epistemologico prevalente era quello filosofico, la cui logica astratta e autoreferenziale non rendeva conto dell’esperienza concreta educativa storicamente determinata. I tentativi da parte di Comenio, Rousseau, Pestalozzi, Herbart, i Positivisti, di conferire una qualche autonomia alla pedagogia rispetto alla filosofia non hanno condotto ad una trasformazione radicale della sua identità come invece sareb…
A genomic reappraisal of symbiotic function in the aphid/Buchnera symbiosis: reduced transporter sets and variable membrane organisations.
2011
International audience; Buchnera aphidicola is an obligate symbiotic bacterium that sustains the physiology of aphids by complementing their exclusive phloem sap diet. In this study, we reappraised the transport function of different Buchnera strains, from the aphids Acyrthosiphon pisum, Schizaphis graminum, Baizongia pistaciae and Cinara cedri, using the re-annotation of their transmembrane proteins coupled with an exploration of their metabolic networks. Although metabolic analyses revealed high interdependencies between the host and the bacteria, we demonstrate here that transport in Buchnera is assured by low transporter diversity, when compared to free-living bacteria, being mostly bas…
Diversifying crop rotations with temporary grasslands: potentials for weed management and farmland biodiversity
2010
Fruchtfolgen können dazu dienen, die kontinuierliche Selektion von Unkrautarten zu verhindern, die an eine bestimmte Kultur angepasst sind. Dies könnte dem Unkrautmanagement, der Einsparung von Herbiziden, und der Biodiversität dienen. Heutige, sehr einfache Furchtfolgen könnten durch mehrjährige Futterkulturen diversifiziert werden. Die Einflüsse solcher mehrjähriger Kulturen auf Unkräuter wurden in vier Ansätzen untersucht : 1) Vegetationsaufnahmen auf 632 Feldern in Westfrankreich zeigten, dass die Unkrautzusammensetzung zwischen mehrjährigen Futterkulturen und einjährigen Kulturen stark variiert. Der Vergleich von Feldern vor, während und nach mehrjährigen Futterkulturen legte nahe, das…
Data from: The interplay of landscape composition and configuration: new pathways to manage functional biodiversity and agro-ecosystem services acros…
2019
[Usage Notes] Martin et al_2019_datatables Data used in Martin et al. (2019) compiled from 49 studies and 1,515 landscapes across Europe. Includes data on the abundance of arthropod species per site and data on pollination, natural pest control and yields in crops across Europe. Martin et al_2019_data tables_300319.xlsx Martin et al_2019_traits database Functional traits data for 2088 species (morphospecies, individuals) from 144 arthropod families sampled in agricultural landscapes across Europe. All traits are categorical and based on published literature or expert knowledge. They are described in Table 1 and Appendix S1 of Martin et al. (2019). The traits included are: feeding habit ('Fu…
Analysing the relationship between yields and farmers' incomes to help the design of more sustainable cropping systems
2022
Farmers often grow only the few high-yielding crops in the area, and target maximum yields through high levels of inputs. These practices are based on the assumption of a positive relationship between productivity and profitability over a wide range of cropping systems (Woo et al., 2020; Erythrina et al., 2021). Part of the correlation between productivity and profitability could be related to differences in production situation and therefore yield potential, i.e. characteristics that do not depend on farmers’ decisions. For a given production situation, the systems with the highest profitability and the best environmental sustainability could be systems with moderate yields. The objective …
PRESENZA IN SICILIA DI GLYCASPIS BRIMBLECOMBEI MOORE (Hemiptera Psyllidae) SU EUCALYPTUS CAMALDULENSIS DEHNH..
2011
On the presence in Sicily of Glycaspis brimblecombei Moore (Hemiptera Psyllidae) on Eucalyptus camaldulensis Dehnh. Authors record the occurrence in Sicily of the red gum lerp psyllid, Glycaspis brimblecombei Moore (Hemiptera Psyllidae) attacking Eucalyptus camaldulensis Dehnh. (Myrtaceae). This species, native to Australia, has been first reported for the Palaearctic Region in 2008, when it has been recorded from the Iberian Peninsula. In 2010 it has been found also in Italy. It seems very difficult to control this insect without the diffusion of its specific antagonist Psyllaephagus bliteus Riek (Hymenoptera Encyrtidae), which resulted very effective in its biological control in North Ame…
Desarrollo de sistemas mesoporosos modificados químicamente para el transporte y liberación selectiva y controlada de fármacos
2019
La presente Tesis Doctoral titulada “Desarrollo de sistemas mesoporosos modificados químicamente para el transporte y liberación selectiva y controlada de fármacos” está centrada en el desarrollo de nuevos sistemas para la detección cromo-fluorogénica de moléculas objetivo, así como en el desarrollo de materiales híbridos orgánicos-inorgánicos para la liberación controlada de fármacos, colorantes y especies fluorescentes, utilizando para ello conceptos de Química Orgánica, Química Supramolecular y de Ciencia de los Materiales. Tanto el desarrollo de procedimientos analíticos para la detección óptica de plaguicidas organofosforados (OPs) utilizando quimiosensores o quimiodosímetros, como la …
Solution de détection des maladies de la vigne par imagerie de drone. Diagnostic et réduction des pesticides à la parcelle
2016
ARTICLE A NE PAS DIFFUSEREAGEAPSIAgrosupCT1; Solution de détection des maladies de la vigne par imagerie de drone. Diagnostic et réduction des pesticides à la parcelle
Il est possible de produire sans pesticide, mais à des niveaux de productivité plus faibles
2022
Chercheur à l’Inrae, Stéphane Cordeau est responsable de la plateforme expérimentale CA-SYS, à Dijon, où sont développées des techniques de production agricole sans pesticide.L'objectif de réduire de 50 % l'emploi de pesticides chimiques en Europe d'ici 2030 est-il atteignable ?2030 c'est demain. Je ne peux pas dire si c'est possible ou pas, en revanche c'est un enjeu de taille pour la recherche. Les systèmes zéro pesticide que l'on teste sur le dispositif expérimental qu'est la plateforme CA-SYS, co-construite avec le monde agricole depuis 2013, visent à éclairer les impasses, les difficultés, les performances, le coût de la transition. On a quatre ans de recul qui démontrent qu'il est pos…