Search results for "Eucalypt"

FIRST RECORD IN TUNISIA OF CLOSTEROCERUS CHAMAELEON (GIRAULT) PARASITOID OF THE EUCALYPTUS GALLWASP OPHELIMUS MASKELLI (ASHMEAD) (Hymenoptera Eulophi…

2010

Closterocerus chamaeleon (Girault) (Hymenoptera Eulophidae), parasitoid of the Eucalyptus gall wasp Ophelimus maskelli (Ashmead) (Hymenoptera Eulophidae) has been recorded for the first time in Tunisia in July 2007. This record suggests that 14 months after its release in Sicily, in May 2006, it has spread over Sicily Channel.

First Record of Leptocybe invasa and Ophelimus maskelli Eucalyptus Gall Wasps in Tunisia

2010

Two Australian gall wasps were detected for the first time in Tunisia on the foliage of Eucalyptus camaldulensis trees. Leptocybe invasa was detected in 2004, while Ophelimus maskelli in 2006. L. invasa makes galls on petioles, leaf midribs and young branches whereas O. maskelli induces galls on limbs. Vigilance is recommended when seedlings are carried to plantation.

DIFFUSIONE DI CLOSTEROCERUS CHAMAELEON (GIRAULT) INTRODOTTO IN SICILIA, SARDEGNA E CALABRIA PER IL CONTROLLO BIOLOGICO DI OPHELIMUS MASKELLI (ASHMEAD…

2008

Ophelimus maskelli, eulofide galligeno di Eucalyptus spp., introdotto in Italia nel 2000, provoca disseccamento e caduta anticipata delle foglie attaccate. Nel 2003 è stato avviato dal Volcani Center (ARO, Israele) e dal CSIRO (Australia) un programma di controllo biologico, introducendo nel 2005 in Israele il parassitoide eulofide Closterocerus chamaeleon (Girault). Nella primavera 2006 l’istituzione israeliana ha inviato al Dip. SENFIMIZO di Palermo foglie di Eucalyptus con migliaia di galle parassitizzate da C. chamaeleon. Dopo i necessari test sulla valutazione del rischio ecologico dell’introduzione, nella prima metà di maggio il parassitoide è stato rilasciato in Sicilia in cinque euc…

Soil bioindicators and weed emergence as affected by essential oils extracted from leaves of three different Eucalyptus species

2017

The widespread use of synthetic herbicides has resulted in herbicide-resistant weeds, altered ecological balance and negative effects on human health. To overcome these problems, efforts are being made to reduce the reliance on synthetic herbicides and shift to natural products. Essential oils (EOs) extracted from plants have been demonstrated to have potential herbicide activity. EOs, composed by volatile organic compounds and characterized by a strong odor, are used in the cosmetic, pharmaceutical and food industries as they are thought to be safe compounds for humans, animals, and the environment. EOs extracted from Eucalyptus leaves have antimicrobial, antiviral, fungicidal, insecticida…

PHYTOTOXIC POTENTIAL EFFECT OF EUCALYPTUS ESSENTIAL OILS FOR WEED CONTROL

2018

The widespread use of synthetic herbicides has resulted in herbicide-resistant weeds, disturbed ecological balance and negative effects on human health. Due to this fact, it is necessary to rely on alternative weed control strategies using natural compounds released by plants, as essential oils (EOs), since they have a short half-life as they are biodegradable, and safer than synthetic compounds, with little damage to the environment, without even contaminating ground water (Topal and Kocaçalıskan 2006). Essential oils from different species contain allelochemical compounds that possess significant phytotoxic activity. Azizi and Fuji (2006) demonstrated that Eucalyptus (family Myrtaceae) EO…

Contributo alla conoscenza degli effetti dell'inquinamneto atmosferico su foglie di Eucalyptus camaldulensis ed E. Globulus (Myrtaceae)

2012

Contribution to the knowledge of air pollution effects on Eucalyptus camaldulensis and E. globulus (Myrtaceae) leaves -.This study deals with the metal storage found in Eucalyptus camaldulensis and E. globulus leaf structures. The cytological and chemical analysis were carried out on samples from the city of Agrigento and its surroundings. The investigation pointed out that the the most evident alterations are phenolic storage and distinctive cellular modification. These features appear related to the greater presence of trace elements within the sites that are more exposed to intense vehicular traffic. Winter samples, moreover, have more evident structural modifications due to a bigger con…

Metabolic responses of microbial community in soil amended with fresh leaves and leaf extracts from eucalyptus spp.

Field observations reveal that often large areas of soil surface beneath Eucalyptus occidentalis Endl. are completely bare or with scant vegetation. Moreover, previous studies have showed that other species of Eucalyptus, such as Eucalyptus camaldulensis Dehn, may be effective in suppressing seed germination and weed growth. Such effects have been ascribed to the large number of secondary metabolites within Eucalyptus leaves. Due to their inhibition activity against weeds, leaf extracts might be used for an integrated weed management context, in accordance with the Directive 2009/128/EC. Several studies exist about the effects of Eucalyptus leaf extracts on weeds, whereas they are lacking o…

The Role of Eucalyptus Species on the Structural and Thermal Performance of Cellulose Nanocrystals (CNCs) Isolated by Acid Hydrolysis

2022

Cellulose nanocrystals (CNCs) are attractive materials due to their renewable nature, high surface-to-volume ratio, crystallinity, biodegradability, anisotropic performance, or available hydroxyl groups. However, their source and obtaining pathway determine their subsequent performance. This work evaluates cellulose nanocrystals (CNCs) obtained from four different eucalyptus species by acid hydrolysis, i.e., E. benthamii, E. globulus, E. smithii, and the hybrid En × Eg. During preparation, CNCs incorporated sulphate groups to their structures, which highlighted dissimilar reactivities, as given by the calculated sulphate index (0.21, 0.97, 0.73 and 0.85, respectively). Although the impact o…

Development of antimigraine transdermal delivery systems of pizotifen malate.

2015

Abstract The aim of this study was to develop and evaluate a transdermal delivery system of pizotifen malate. Pizotifen is frequently used in the preventive treatment of migraine, but is also indicated in eating disorders. In the course of the project, the effects of chemical enhancers such as ethanol, 1,8-cineole, limonene, azone and different fatty acids (decanoic, decenoic, dodecanoic, linoleic and oleic acids) were determined, first using a pizotifen solution. Steady state flux, diffusion and partition parameters were estimated by fitting the Scheuplein equation to the data obtained. Among the chemical enhancers studied, decenoic acid showed the highest enhancement activity, which seeme…

Effects of essential oils and selected compounds from Lamiaceae family as adjutants on the treatment of subjects with periodontitis and cardiovascula…

2021

Essential oils from different plant species were found to contain different compounds exhibiting anti-inflammatory effects with the potential to be a valid alternative to conventional chemotherapy that is limited in long-term use due to its serious side effects. Generally, the first mechanism by which an organism counteracts injurious stimuli is inflammation, which is considered a part of the innate immune system. Periodontitis is an infectious and inflammatory disease caused by a dysbiosis in the subgingival microbiome that triggers an exacerbated immune response of the host. The immune–inflammatory component leads to the destruction of gingival and alveolar bone tissue. The main anti-infl…