Infectividade natural por Xylella fastidiosa Wells et al. de cicadelíneos (Hemiptera: Cicadellidae) de lavouras cafeeiras do Paraná

Abstract

Natural Infectivity of Xylella fastidiosa Wells et al. in Sharpshooters (Hemiptera: Cicadellidae) from Coffee Plantations of Parana, Brazil ABSTRACT-Xylella fastidiosa Wells et al., a gram-negative and xylem limited bacterium, causes insects and four sharpshooters species have been reported as vectors of X. fastidiosa of this study was to determine the natural infectivity of X. fastidiosa coffee trees: Acrogonia citrina Marucci & Cavichioli, Bucephalogonia xanthophis (Berg), Dilobopterus costalimai Young, Oncometopia facialis (Signoret) and Sonesimia grossa Samples were collected examined for the presence of X. fastidiosa X. fastidiosa was present O. facialis A. citrina X. fastidiosa of dissemination of X. fastidiosa

Transmission of Xylella fastidiosa by naturally infected Philaenus spumarius (Hemiptera, Aphrophoridae) to different host plants

“…The meadow spittlebug natural infectivity rate is high, also compared to the ones recorded on five species of sharpshooters collected throughout the year from coffee plantations of the State of Paranà, Brazil (Silva et al. ) (about 50% when analysed in groups of three to five insects). Therefore, in the case of olive quick decline syndrome in Apulia, we observe a high percentage of naturally infected vectors insects.…”

Spatial Genetic Structure of Coffee-Associated Xylella fastidiosa Populations Indicates that Cross Infection Does Not Occur with Sympatric Citrus Orchards

“…We postulate that similar patterns of genetic structure observed for both coffee-and citrus-infecting X. fastidiosa populations are a result of shared ecological traits. Those include vector dispersal of inoculum by the same sharpshooter leafhopper species (Marucci et al 2008;Silva et al 2007), which are potentially important but apparently inefficient for long-distance dispersal of the pathogen (Coletta-Filho et al 2014). Another factor is that genetic structuring of bacterial populations can lead to linkage disequilibrium even in the presence of recombination (Feil 2010).…”

“…Brazilian coffee plantations host X. fastidiosa insect vector populations that may have high infection rates (Silva et al 2007), which likely contribute to elevated disease prevalence and widespread distribution of this pathogen over large spatial scales (de Lima et al 1998). Both coffee and citrus X. fastidiosa-infecting strains share the same xylem sap-feeding leafhopper vector species that are similar in respect to their ability to transmit X. fastidiosa (Marucci et al 2008).…”

In vitro evaluation of essential oils for potential antibacterial effects against Xylella fastidiosa

“…Xylella fastidiosa is a Gram‐negative bacterium belonging to the phylum proteobacteria subdivision gamma (Silva, Meneguim, & Paião, ). In 1973, the first reports about this aetiological agent were associated with Pierce diseases in vines.…”