Search results for " Phoenix canariensis"
showing 10 items of 12 documents
Potential effects of Bacillus thuringiensis against adults and older larvae of Rhynchophorus ferrugineus.
2009
The culturable bacterial community of frass produced by larvae of Rhynchophorus ferrugineus Olivier (Coleoptera: Curculionidae) in the Canary island …
2012
Aims: Larvae of the red palm weevil (RPW) Rhynchophorus ferrugineus Olivier (Coleoptera: Curculionidae) feed inside palm stem tissues, making galleries and producing a wet fermenting frass. We characterized the culturable micro-organisms associated with frass produced by tunnelling larvae inside the Canary island date palms and investigated the role of frass and gut bacteria in plant polymers breakdown. Methods and Results: A culture-dependent method was used to isolate bacteria from frass and noninfested palm tissues. Bacterial isolates were grouped into operational taxonomic units based on polymorphisms in the ITS-PCR profiles, and representative isolates were identified by partial sequenci…
Transcriptome analysis of Phoenix canariensis Chabaud in response to Rhynchophorus ferrugineus Olivier attacks
2015
Red Palm Weevil (RPW, Rhynchophorus ferrugineus Olivier) threatens most palm species worldwide. Until now, no studies have analyzed the gene regulatory networks of Phoenix canariensis (Chabaud) in response to RPW attacks. The aim of this study was to fill this knowledge gap. Providing this basic knowledge is very important to improve its management.Results: A deep transcriptome analysis was performed on fully expanded leaves of healthy non-infested trees and attacked trees at two symptom stages (middle and late infestation). A total of 54 genes were significantly regulated during middle stage. Pathway enrichment analysis showed that phenylpropanoid-related pathways were induced at this stag…
Underestimated impact of Red Palm Weevil introduction on iandscape biodiversity: the help of the molecular tools
2012
Alien species have been introduced both accidentally and intentionally. The last are and have been motivated by economic, environmental and social considerations (NOBANIS, 2010), as in the case of many palm species (Phoenix canariensis, P. dactylifera, Washingtonia filifera, W. robusta) in Sicily. These Arecaceae are important in the urban areas and they contribute to the typical Sicilian Panorama. On the other hand the accidental introduction of invasive alien species can be one a cause of the loss of native biodiversity, especially severe on islands and other isolated ecosystems. Phytophagous insects can cause biodiversity losses and may also have a strong impact on the economy of the isl…
La cattura di adulti del Punteruolo rosso delle palme con trappole a feromone e allomoni in ambiente urbano
2010
In questo lavoro sono presentati i risultati di un anno di catture di adulti di Punteruolo rosso delle palme, Rhynchophorus ferrugineus (Olivier), con trappole a feromone e allomoni collocate nel comune di Marsala (TP). In totale sono state sistemate 47 trappole ad una distanza media di circa 200 m. Le trappole sono state innescate con feromone di aggregazione (ferrorule), acetato di etile (10 % /H2O), e melassa (10 % /H2O), ed ispezionate settimanalmente per il periodo aprile 2008 – aprile 2009. Le trappole sono state disposte lungo la costa della città(N=21), e lungo una linea che attraversa il centro cittadino (N=26). In totale sono stati catturati 4010 adulti, con un numero complessivo …
Fungi related to larvae of red palm weevil Rhynchophorous ferrugineus (Coleoptera: Curculionidae)
2010
As a first step to developing effective biocontrol strategies, we analyzed the pathogens and mainly the entomopathogenic fungal species, present into dead larvae of Rhynchophorous ferrugineus; a quarantine pest recently introduced and acclimated in Sicily (Italy). From 2008 to 2010, we estimated the natural larval mortality (> second instar) of R. ferrugineus collected from infested palm Phoenix canariensis; that was variable from 10 to 35%, according to the different seasons Among the different pathogens recorded the fungi seems have an important role, than in order to distinguish saprophytic or opportunistic species from potential pathogens (including the non cultivable ones) we applied d…
NATURAL OCCURRENCE AND CHARACTERISTICS OF ENTOMOPATHOGENIC FUNGI ISOLATED FROM RED PALM WEEVIL IN SICILY (ITALY).
2008
Introduction: Originally from tropical Asia, the red palm weevil (Rhynchophorus ferrugineus (Olivier)) is the most dangerous and deadly pest of date, coconut, oil, sago and other palms. It has spread to Africa and Europe, reaching the Mediterranean in the 1980s, and was first recorded in Sicily (Italy) in 2005. Due to its recent introduction and the difficulty of its control, to known the natural pathogens of RPW in the introduced areas is very important. Methods: Pupae from infested palms Phoenix canariensis Hort. were collected. The entomopathogenic fungi were isolated and growth. Because of it is possible to growth only the 1% of the known fungi, the identification of entomopathogens is …
Impoverishment of Sicilian (Italy) historical and cultural assets by an alien insect species:the case study of the Real Palm Weevil
2012
Microorganisms and insects have a disastrous impact on the biodiversity, cultural heritage and economy of a geographic area. However, in recent decades, the negative effects of invasive alien species (IAS), including both animal and plant or microorganisms occurring outside their natural distribution range, are generally not well known. Invasive alien species are most often found in or near urban areas, as well as throughout the settled landscape. According to the World Conservation Union, IUCN 2012, IAS represent the second most significant threat to biodiversity after resource depletion of habitats, becoming predators, competitors, parasites, hybridizers and diseases for native plants and…
IMPOVERISHMENT OF SICILIAN (ITALY) HISTORICAL AND CULTURAL ASSETS BY AN ALIEN INSECT SPECIES: THE CASE OF THE RED PALM WEEVIL.
2012
Alien invasive species (IAS) have a disastrous impact on the biodiversity, cultural heritage and economy of a geographic area. The case of the Red Palm Weevil (RPW), an IAS that attacks the non-native palm species Phoenix canariensis, but also native species Chaemerops humilis, especially in urban and peri-urban areas, is reported. These palm trees have played an important role in Sicilian history and cultural heritage since the period of the Arab invasion. The accidental introduction of the RPW has remarkably changed the Sicilian panorama. In this study the chronology and the severity of the effects of RPW on palms so far detected, is reported. In only 7 years the RPW has drastically chang…
Association of entomopathogenic fungi with exotic red palm weevil in treated and untreated Phoenix canariensis
2011
Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae) is introduced pests of established Phoenix canariensis in Sicily (Italy). A three-year field survey of R. ferrugineus generated data on species of fungal associated with larval, pupae, and adult R. ferrugineus recovered from several cadavers. Moreover specimens were collected from infested Phoenix canariensis in scattered locales in Sicily to determine also infection rates with entomopathogenic fungi over 3 years. Collection was done after overwintering period, during summer and at the beginning of autumn in palm, untreated and treated with chemical pesticides. As can be expected the highest infestation was recorded after overw…