ISA - Comunicações em Conferências
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The collection includes documents produced within the scope of national or international conferences or congresses, including abstracts or extended abstracts published in proceedings, and oral or posters communications.
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- Os ácaros na cultura da amora em estufa e infestantesPublication . Pina, Silvia; Ferreira, Maria dos Anjos; Calha, Isabel; Figueiredo, ElisabeteAcarological surveys were carried out fortnightly from March to June 2011 on blackberries and weeds in a greenhouse at Fataca Experimental Farm in Odemira, in order to study species diversity and population interaction. This study focused on two blackberry cultivars, ‘Ouachita’ and ‘Karaka Black’. Sixteen mite species were identified on blackberries. The redberry mite Acalitus essigi (Hassan) was the most noxious mite in both cultivars, causing severe damage. However, the late maturing Ouachita cultivar was the most attacked by this eriophyid mite. The most common predacious mites were the stigmaeid Agistemus longisetus Gonzalez and the phytoseiids Amblyseius stipulatus Athias-Henriot and Amblyseius californicus (McGregor). From the 36 weed species identified, 22 were host plants of mites with agricultural interest, 14 mite species being identified. Phytoseiids, especially A. stipulatus, observed on 13 weed species, indifferent tydeids, in particular Orthotydeus californicus (Banks), observed on 10 weed species, and the stigmaeid A. longisetus, observed on seven weed species, were the predominant mites. These mite species also occurred on blackberries. The most important host weeds of mites were Amaranthus deflexus L., Chenopodium murale L., Conyza bonariensis (L.) Cronq., Conyza canadensis (L.) and Solanum nigrum L., mainly associated to predators, A. stipulatus and A. longisetus. From acarological point of view, safeguarding the competition relatively to some vegetal species, ground cover vegetation can be an important component of conservation biological control in blackberry crop, because host weeds of mites are mostly repositories of predacious species
- Adopção de protecção integrada em tabaco armazenado em PortugalPublication . Mexia, António; Carvalho, M.O.; Pereira, A.P.Lasioderma serricorne (F.) and Ephestia elutella (Hb.) are the most serious pests of stored tobacco. Mainly are the larvae that feed on the product, may contaminate it with their excreta and cause damage on tobacco and allergic responses. The present work evaluated cigarette beetles and tobacco moths’ populations from the tobacco fields to the processing factories in Portugal using pheromone traps. Density, dispersion, risk assessment and the efficacy of making decisions based on economic thresholds were evaluated. For L. serricorne, the efficacy of mass-trapping using pheromone traps was studied. Sequential sampling for risk assessment was developed for processed tobacco and in a cigarette factory. These studies pretended to contribute for the integrated pest management of stored tobacco and also for the stored products in general, as the methodologies applied, with some adaptations, can be used for other pests and stored products.
- AFINET: agroforestry innovation thematic networkPublication . Villada, A.; Paulo, Joana Amaral; Palma, J.H.N.
- AGFORWARD: achievments during the first two yearsPublication . Burgess, P.J.; den Herder, M.; Garnet, K.; Graves, A.R.; Hermansen, J.; Liagre, F.; Moreno, G.; Mosquera-Losada, M.R.; Palma, J.H.N.; Pantera, A.; Plieninger, T.; Mirck, J.
- A agricultura familiar versus a agricultura de subsistência no âmbito da segurança alimentar no espaço dos países da CPLPPublication . Correia, Augusto Manuel
- Agricultural, forest and rural policy sectors' receptiveness to agroforestry intercropping systems in Quebec (Canada)Publication . Laroche, G.; Mercier, J.; Olivier, A.In Quebec (Canada), intercropping trees and crops is a new practice in the agricultural landscape dominated by conventional monocropping systems. As research goes on and slowly reveals the potential of these systems to address some key issues in agriculture, forestry and rural development, and as farmers’ awareness increases, there is a pressing need to find public support for these systems. In order to help the promoters of agroforestry intercropping systems in their search of support in the political arena, we conducted a comparative study of the receptiveness of the agricultural, forest and rural policy sectors to these systems. As the literature on public policy processes has stressed the importance of policy stakeholders’ ideas in the implementation of new policies, we used a conceptual framework based on cognitive schemes to compare the ideas driving these policy sectors with the ideas supporting agroforestry intercropping systems. Results based on the analysis of formal publications and semi-directed interviews conducted with agroforestry experts and policy stakeholders underline that agroforestry intercropping systems are mostly featured by their promoters as sustainable and multifunctional systems. The rural policy sector has proven to be the most receptive and the forest sector the less receptive, while the agricultural sector lies in-between, offering small-scale support to agroforestry intercropping systems. The analysis highlights that policy sectors integrating multifunctionality in their core ideas are supportive of agroforestry intercropping systems, while sectors remaining largely focused on specialization and productivity are less receptive. Our study also shows that public incentives might not be sufficient to drive the adoption of agroforestry intercropping systems since major barriers to their implementation remain in some policy sectors. Featuring these systems as productive might be a necessary argument shift to tear down policy barriers and increase public support.