23 documents found, page 1 of 3
O ensino da Herbologia na Escola Superior Agrária de Beja
Portugal, JoãoO ensino da Herbologia em Portugal na atualidade restringe-se a apenas três Instituições de ensino Superior: Instituto Superior de Agronomia, Escola Superior Agrária de Viseu e Escola Superior Agrária de Beja. A Escola Superior Agrária de Beja (ESA) no ano letivo de1986/87 lecionou o seu primeiro Curso, denominado Curso de Produção Agrícola. O plano de estudos deste Curso contemplava a disciplina de Controlo de...
Weed resistance to herbicides in Portugal
Portugal, João; Calha, IsabelThirty years ago, the first case of resistance to herbicides was recorded in Portugal: Alisma plantago-aquatica resistant to bensulfuron-methyl in rice. Since then, herbicide resistance has been developing in many weed species. Changes in cultural practices, new cropping systems combined with the increased use of herbicides led to the selection of weeds that are resistant to a wide range of herbicides. This pro...
Renaturalização da Agricultura - Nota de abertura do fascículo especial de comu...
Portugal, João; Calha, Isabel M.; Aguiar, FranciscaÉ responsabilidade das sociedades científicas, de que são exemplo a Sociedade Portuguesa de Ciências Agrárias (SCAP) e da Sociedad Española de Malherbologia (SEMh), organizar reuniões e encontros para promover a discussão sobre temáticas que se encontram no âmbito da sua Missão. Este fascículo especial da Revista de Ciências Agrárias é dedicado à publicação das comunicações apresentadas no IV Simpósio Nacional ...
Enhanced detoxification via Cyt-P450 governs cross-tolerance to ALS-inhibiting ...
Palma-Bautista, Candelario; Vásquez-García, José G.; Portugal, João; Bastida, Fernando; Alcántara-de la Cruz, Ricardo; Osuna-Ruiz, Maria D.; Torra, JoelCentaurea is a genus of winter weeds with a similar life cycle and competitive traits, which occurs in small-grains production fields in the central-southern of the Iberian Peninsula. However, most of herbicides recommended for weed management in wheat show poor control of Centaurea species. This study summarizes the biology, herbicide tolerance to acetolactate synthase (ALS) inhibitors, and recommended chemica...
Filago pyramidata tolerant to ALS-Inhibiting herbicides: A new invasive weed in...
Palma-Bautista, Candelario; Vásquez-García, José; Domínguez-Valenzuela, José; Alcántara-de la Cruz, Ricardo; De Prado, Rafael; Portugal, JoãoWeeds that usually grow in non-agricultural areas have become increasingly common invading perennial crops. Species of the genus Filago, in addition to invading Spanish olive groves, have developed certain levels of natural tolerance to the acetolactate synthase (ALS) inhibiting herbicide flazasulfuron. The objective of this study was to determine the level and the mechanism involved in the tolerance to flazasu...
Different non-target site mechanisms endow different glyphosate susceptibility ...
Vázquez-García, José; Torra, Joel; Palma-Bautista, Candelario; Bastida, Fernando; Alcántara-de la Cruz, Ricardo; Portugal, João; De Prado, RafaelIn recent decades, cereal agriculture across main producing areas in Spain has progressively adopted direct sowing, associated with an increased use of herbicides in pre-sowing. Weedy species from genus Avena have been observed after the application of glyphosate in wheat. Here, Avena fatua (two accessions), Avena byzantina and Avena sterilis subsp. sterilis, one accession each, were taxonomically characterized...
The Asp376Glu mutation and enhanced metabolism controlling the resistance of AL...
Domínguez-Valenzuela, José; Vázquez-García, José; Castro, Patricia; Palma-Bautista, Candelario; Cruz-Hipolito, Hugo; Rey, Maria-DoloresA study was carried out to determine the ALS (acetolactate synthase)-inhibitor herbicide resistance in the Mexican grass Ixophorus unisetus, a troublesome weed in corn crops in Mexico. First, the resistance was confirmed in field screening assays. Eight populations that survived nicosulfuron treatment at a field rate of 40 g ai ha−1 were labeled as putative-resistant. Dose–response trials demonstrated a high re...
Convergent adaptation of multiple herbicide resistance to auxin mimics and ALS-...
Domínguez-Valenzuela, José; Palma-Bautista, Candelario; Vázquez-Garcia, José; Yanniccari, Marcos; Gigón, Ramón; Alcántara-de la Cruz, RicardoHerbicide-resistant weeds have been identified and recorded on every continent where croplands are available. Despite the diversity of weed communities, it is of interest how selection has led to the same consequences in distant regions. Brassica rapa is a widespread naturalized weed that is found throughout temperate North and South America, and it is a frequent weed among winter cereal crops in Argentina and ...
Genetic diversity and population structure of Cynara cardunculus L. in southern...
Castro, Maria Miguel; Rosa, Daniela; Ferro, Ana M.; Faustino, Ana; Paulino, Ana; Brás, Teresa; Machado, Eliana; Cruz, Carla Pinto; Belo, Anabela D. F.Cynara cardunculus L. is a cardoon species native to the Mediterranean region, which is composed of three botanical taxa, each having distinct biological characteristics. The aim of this study was to examine wild populations of C. cardunculus established in Portugal, in order to determine their genetic diversity, geographic distribution, and population structure. Based on SSR markers, 121 individuals of C. card...
Stacked traits conferring multiple resistance to imazamox and glufosinate in so...
Domínguez- Mendez, Rafael; Cruz, Ricardo Alcántara- de la; Rojano- Delgado, Antonia M.; Silveira, Hellen Martins da; Portugal, JoãoConventional crossing of soft wheat cultivars resistant to imazamox and glufosinate resulted in two (Rados and Helter) lines resistant to both herbicides. Stacked traits conferring this dual herbicide resistance in these lines, compared with a susceptible (S) cultivar, were characterized.Rados and Helter lines were ∼ 18‐fold more resistant (R) to glufosinate, and between 15.1 and 19.8‐fold more resistant to ima...