6 documents found, page 1 of 1

Evaluation of antimicrobial efficacy of current methods to control fire blight ...

[Excerpt] Erwinia amylovora, a major pathogenic bacterium affecting pome fruit plants, causes fire blight, a devastating disease of pears and apples (1 ]. lnfection typically begins in flowers and leads to the blackening of leaves, stems, and immature fruits (2). E. amy/ovora is widespread in North and Central America and Europe and spreads through insects, rain, wind, infected propagating material, and non-dis...

O fogo bacteriano na produção de peras e maçãs: caracterização da situação naci...

Studies on differential susceptibility of ‘Rocha’ pear clones and Portuguese va...

Fire blight was officially identified for the first time in Portugal, in 2011, affecting pear cultivar ‘Rocha’, the most important Portuguese variety of pear, with high economic impact in the production chain and trade. Since then the bacterium has destroyed new orchards in several areas of pear and apple production in the country. Nurseries and phytogenetic resources of several important in vivo collections ha...

A new bacterial disease of carnation in Portugal caused by Burkholderia andropo...

The occurrence of a leaf spot disease of carnation caused by Burkholderia andropogonis is recorded for the first time in Portugal. Symptoms consisted of ‘eyespot’ lesions on all aerial plant parts, often bordered by water-soaked halos on the leaves. As the disease progressed lesions became dark brown and affected areas dried out. Phenotypic studies and Polymerase Chain Reaction using specific primers Pf/Pr targ...

Molecular epidemiology of Ralstonia solanacearum strains from plants and enviro...

Several outbreaks of bacterial wilt disease caused by the quarantine bacterium Ralstonia solanacearum were identified in Portugal. Intensive surveys recognized the bacterium as endemic in the main irrigated agricultural ecosystems. Between 1999 and 2006 all isolates of R. solanacearum were characterized as belonging to biovar 2A. In 2007, biovar 1 strains were recorded in potato fields under a confined area. A ...

A doença do mal murcho em Portugal: análise fenética, filogenética e epidemioló...

Descreve-se o estado da arte dos conhecimentos mais relevantes e explicativos da doença do pus ou mal murcho e do seu agente causal Ralstonia solanacearum. Enumeram-se os sintomas da doença em culturas solanáceas e o seu historial em Portugal, bem como as repercussões da sua presença a nível sócio-económico. Procede-se ao enquadramento sistemático e taxonómico do seu agente causal, evidenciam-se os conhecimento...