45 research outputs found
Studies on the association of the Quercus suber decline disease with Phytophthora cinnamomi in Portugal
En Portugal, la enfermedad de la “seca” se ha
descrito en los Quercus de hoja perenne (Quercus
suber L. and Q.ilex subsp. rotundifolia Lam.) desde
el final del siglo XIX. La mortalidad de estas
especies afecta, particularmente las regiones centrales
y meridionales del país, siendo uno de los problemas
forestales más graves. Phytophthora cinnamomi
Rands es el principal patógeno responsable de la
mortalidad de alcornoques y encinas en Portugal. Se
han desarrollado varios estudios teniendo como
objetivo una mejor comprensión del efecto de la
acción de P. cinnamomi en el decaimiento de los
Quercus.
El actual trabajo describe resultados preliminares
de algunos de estos estudios.___________________________________In Portugal, the decline disease has been described
in evergreen oaks (Quercus suber L. and Q.ilex
subsp. rotundifolia Lam.) since the end of the 19th
century. The mortality of these species affects,
particularly the central and southern regions of the
country, being one of the most severe forest
problems. Phytophthora cinnamomi Rands is the
main pathogen responsible for the cork and holm
oak mortality in Portugal. Several studies have
been developed aiming at a better understanding of
the effect of the P. cinnamomi action on the cork
oak trees decline.
The present work describes preliminary results of
some of these studies
Caracterização da cadeia produtiva de brássicas no Brasil
Brassica crops worldwide provide the greatest diversity of products used by man derived from a single genus. Collectively, leafy, flower and root vegetables can be eaten fresh, cooked and processed. The production of these vegetables in Brazil has been growing exponentially in the last decades, due to its economic importance, with major production volumes in several states and a quick monetary return for growers in areas considered of small acreage. With expansion, a number of aspects, including demands for quality and safety of these foods introduce themselves, strictly attached to the forms of production, logistics and their appearance. To meet the challenges and list the trends within the activities of different agents, a multiple case study was held in the states of Amazon, Minas Gerais, Paraná and Rio de Janeiro. Altogether, 55 stakeholders were interviewed, along with the compilation of different sources of data to characterize this productive chain. Changes in the scenario are imperative in order to maintain the activity of overcoming years, being related to cultivars adaptation, plant health, productions costs and difficulties during the establishment of crops. To overcome these adversities, a collective effort in terms of organization, technology transfer and R&D from official and private agents, technical assistance, and regional sanitary inspection is imperative, aiming, especially, in actions regarding themes like protected cultivation, mechanization/automation and adding value to products by processing and packaging, listed by stakeholders as priority. © 2019, Sociedade de Olericultura do Brasil. All rights reserved