| traditional use of mosquito-repellent plants in western kenya and their evaluation in semi-field experimental huts against anopheles gambiae: ethnobotanical studies and application by thermal expulsion and direct burning. | ethnobotanical survey in 2 communities in western kenya revealed that the most commonly known repellent plants were ocimum americanum l. (64.1%), lantana camara l. (17.9%), tagetes minuta l. (11.3%) and azadirachta indica a. juss (8.7%) on rusinga island, and hyptis suaveolens poit. (49.2%), l. camara (30.9%) and o. basilicum l. (30.4%) in rambira. direct burning of plants is the most common method of application for o. americanum (68.8%), l. camara (100%) and o. basilicum (58.8%). placing branc ... | 2002 | 12174767 |
| repellency of live potted plants against anopheles gambiae from human baits in semi-field experimental huts. | the repellency of potted plants against the malaria vector anopheles gambiae sensu stricto giles was quantified in experimental huts under semi-field conditions inside a screen-walled greenhouse. ocimum americanum linnaeus (labiatae), lantana camara l. (verbenaceae), and lippia uckambensis spreng (verbenaceae) repelled at an average of 39.7% (95% confidence interval [ci] = 29.6-48.4%), 32.4% (95% ci = 19.7-43.1%), and 33.3% (95% ci = 21.5-43.3%) of the mosquitoes, respectively (p < 0.0001 for al ... | 2002 | 12389946 |
| field efficacy of thermally expelled or live potted repellent plants against african malaria vectors in western kenya. | to estimate the effectiveness of live potted plants and thermal expulsion of plant materials in repelling african malaria vectors in traditional houses in western kenya. | 2003 | 14629767 |
| laboratory and field tests of the effectiveness of the lemon-eucalyptus extract, citridiol, as a repellent against land leeches of the genus haemadipsa (haemadipsidae). | citridiol is an extract of the leaves of corymbia citriodora (myrtaceae), the lemon eucalyptus, and mostly consists of p-menthane-3,8-diol isomers. the effectiveness of this extract as a repellent against land leeches of the genus haemadipsa (haemadipsidae), primarily h. sylvestris, was tested in the laboratory and field, in peninsular malaysia. the formulation tested, mosi-guard natural spray, contained 40% (w/w) citridiol in a base of ethanol, water and isopropanol. in the laboratory test, spe ... | 2005 | 16212803 |
| repellency of oils of lemon eucalyptus, geranium, and lavender and the mosquito repellent mygga natural to ixodes ricinus (acari: ixodidae) in the laboratory and field. | mygga natural (bioglan, lund, sweden) is a commercially available repellent against blood-feeding arthropods. it contains 30% of lemon-scented eucalyptus, corymbia citriodora (hook.) k. d. hill & l. a. s. johnson (myrtaceae), oil with a minimum of 50% p-menthane-3,8-diol. mygga natural also contains small amounts of the essential oils of lavender, lavandula angustifolia mill. (lamiaceae), and geranium, pelargonium graveolens l'her. (geraniaceae). in laboratory bioassays, mygga natural and c. cit ... | 2006 | 16892632 |
| field evaluation of traditionally used plant-based insect repellents and fumigants against the malaria vector anopheles darlingi in riberalta, bolivian amazon. | inexpensive insect repellents may be needed to supplement the use of impregnated bed-nets in the amazon region, where the primary malaria vector, anopheles darlingi (root), is exophilic and feeds in the early evening. three plants that are traditionally used to repel mosquitoes in riberalta, bolivian amazon, were identified by focus group, and then they were tested against an. darlingi as well as mansonia indubitans (dyar & shannon)/mansonia titillans (walker). cymbopogon citratus (staph), guate ... | 2007 | 17695017 |
| foliar delta(13)c and delta(18)o reveal differential physiological responses of canopy foliage to pre-planting weed control in a young spotted gum (corymbia citriodora subsp. variegata) plantation. | weed control may improve the growth of forest plantations by influencing soil water and nutrient availability, but our knowledge of leaf-level physiological responses to weed control at different within-canopy positions is limited for tropical and subtropical plantations. foliar carbon (delta(13)c) and oxygen (delta(18)o) isotope compositions, gas exchange, and nitrogen (n(mass)) and phosphorus (p(mass)) concentrations at four canopy positions were assessed in a young spotted gum (corymbia citri ... | 2008 | 18708335 |
| toxic effects of two acid sulfate soils from the dabaoshan mine on corymbia citriodora var.variegata and daphnia carinata. | acidic, metal-stressed conditions encountered in the acid sulfate soils significantly inhibited the growth of corymbia citriodora var.variegata, possibly due to the reduced rate of photosynthesis and plant root activity. however, the plant's self-protection mechanism to counteract stress-induced cellular damage by reactive oxygen species still functioned well even at a soil ph as low as 2.81. this may explain the high tolerance of this plant species to the extremely acidic environments. the obse ... | 2009 | 19157696 |
| acaricidal effects of corymbia citriodora oil containing para-menthane-3,8-diol against nymphs of ixodes ricinus (acari: ixodidae). | the toxicity of para-menthane-3,8-diol (pmd), the main arthropod-repellent compound in the oil of the lemon eucalyptus, corymbia citriodora, was evaluated against nymphs of ixodes ricinus using five methods (a-e) of a contact toxicity bioassay. mortality rates were estimated by recording numbers of dead nymphs at 30 min intervals during the first 5 h after the start of exposure and at longer intervals thereafter. the mortality rate increased with increasing concentration of pmd and duration of e ... | 2009 | 19169833 |
| field investigation on the repellent activity of some aromatic plants by traditional means against anopheles arabiensis and an. pharoensis (diptera: culicidae) around koka, central ethiopia. | a study was undertaken to evaluate the impact of traditional application methods of mosquito repellent plants in the reduction of the human-vector contact of malaria vectors in central ethiopia. the plants (corymbia citriodora, eucalyptus camaldulensis, ocimum suave and ocimum basilicum) were tested by thermal expulsion and direct burning on traditional stoves in the field against two important malaria vectors in ethiopia (anopheles arabiensis and an. pharoensis). a latin-square design was appli ... | 2009 | 19539591 |
| fresh, dried or smoked? repellent properties of volatiles emitted from ethnomedicinal plant leaves against malaria and yellow fever vectors in ethiopia. | abstract: background: in the search for plant-based mosquito repellents, volatile emanations were investigated from five plant species, corymbia citriodora, ocimum suave, ocimum lamiifolium, olea europaea and ostostegia integrifolia, traditionally used in ethiopia as protection against mosquitoes. methods: the behaviour of two mosquitoes, the malaria vector anopheles arabiensis and the arbovirus vector aedes aegypti, was assessed towards volatiles collected from the headspace of fresh and dried ... | 2011 | 22182798 |
| [preliminary screening tests of molluscicidal effect of extracts from eucalyptus leaves]. | to investigate the molluscicidal effects of extracts from five eucalyptus leaves collected from guangdong province, china. | 2012 | 23593845 |
| mass spectrometric identification and toxicity assessment of degraded products of aflatoxin b1 and b2 by corymbia citriodora aqueous extracts. | this study explores the detoxification potential of corymbia citriodora plant extracts against aflatoxin b1 and b2 (afb1; 100 μg l(-1) and afb2; 50 μg l(-1)) in in vitro and in vivo assays. detoxification was qualitatively and quantitatively analyzed by tlc and hplc, respectively. the study was carried out by using different parameters of optimal temperature, ph and incubation time period. results indicated that c. citriodora leaf extract(s) more effectively degrade afb1 and afb2 i.e. 95.21% and ... | 2015 | 26423838 |
| antiplasmodial activity of medicinal plants from chhotanagpur plateau, jharkhand, india. | the alarmingly increasing problem of drug resistance in treatment of malaria has led to an urgent need for identifying new anti-malarial drugs for both prophylaxis and chemotherapy. | 2015 | 25721804 |
| ethanol production from eucalyptus plantation thinnings. | conditions for optimal pretreatment of eucalypt (eucalyptus dunnii) and spotted gum (corymbia citriodora) forestry thinning residues for bioethanol production were empirically determined using a 3(3) factorial design. up to 161mg/g xylose (93% theoretical) was achieved at moderate combined severity factors (csf) of 1.0-1.6. at csf>2.0, xylose levels declined, owing to degradation. moreover at high csf, depolymerisation of cellulose was evident and corresponded to glucose (155mg/g, ∼33% cellulose ... | 2012 | 22342086 |
| in vitro biological evaluation of eight different essential oils against trypanosoma cruzi, with emphasis on cinnamomum verum essential oil. | essential oils (eos) are complex mixtures of secondary metabolites from various plants. it has been shown that several eos, or their constituents, have inhibitory activity against trypanosomatid protozoa. thus, we analyzed the biological activity of different eos on trypanosoma cruzi, as well as their cytotoxicity on vero cells. | 2014 | 25148924 |
| fumigant antifungal activity of corymbia citriodora and cymbopogon nardus essential oils and citronellal against three fungal species. | corymbia citriodora and cymbopogon nardus essential oils samples were analyzed by gc and gc-ms and their qualitative and quantitative compositions established. the main component of essential oils of c. citriodora and c. nardus was citronellal, at 61.78% and 36.6%, respectively. the essential oils and citronellal were tested for their fumigant antifungal activity against pyricularia (magnaporthe) grisea, aspergillus spp., and colletotrichum musae. the minimum inhibitory concentration (mic) range ... | 2014 | 24600325 |
| structural and chemical characterization of hardwood from tree species with applications as bioenergy feedstocks. | eucalypt species are a group of flowering trees widely used in pulp production for paper manufacture. for several decades, the wood pulp industry has focused research and development efforts on improving yields, growth rates and pulp quality through breeding and the genetic improvement of key tree species. recently, this focus has shifted from the production of high quality pulps to the investigation of the use of eucalypts as feedstocks for biofuel production. here the structure and chemical co ... | 2012 | 23300786 |
| host tree influences on longicorn beetle (coleoptera: cerambycidae) attack in subtropical corymbia (myrtales: myrtaceae). | phoracantha longicorn beetles are endemic to australia, and some species have become significant pests of eucalypts worldwide, yet little is known about their host plant interactions and factors influencing tree susceptibility in australia. here, we investigate the host relationships of phoracantha solida (blackburn, 1894) on four eucalypt taxa (one pure species and three hybrid families), examining feeding site physical characteristics including phloem thickness, density, and moisture content, ... | 2014 | 24367905 |
| fuzzy logic applied to prospecting for areas for installation of wood panel industries. | prospecting for suitable areas for forestry operations, where the objective is a reduction in production and transportation costs, as well as the maximization of profits and available resources, constitutes an optimization problem. however, fuzzy logic is an alternative method for solving this problem. in the context of prospecting for suitable areas for the installation of wood panel industries, we propose applying fuzzy logic analysis for simulating the planting of different species and eucaly ... | 2017 | 28237845 |
| in vitro and in vivo acaricide action of juvenoid analogs produced from the chemical modification of cymbopogon spp. and corymbia citriodora essential oil on the cattle tick rhipicephalus (boophilus) microplus. | the present study aimed to evaluate the acaricidal action of the chemically modified essential oil of cymbopogon spp. and corymbia citriodora on rhipicephalus (boophilus) microplus. citronellal was converted into n-butylcitronellylamine and in n-prop-2-inylcitronellylamine, analogs of juvenoids, by reductive amination using butylamine (n1 to n3) and propargylamine (n4 to n7). in vitro assays included the adult immersion, and larval packet tests. engorged females were weighed in groups of 10 and ... | 2014 | 25085774 |
| identification and field evaluation of non-host volatiles disturbing host location by the tea geometrid, ectropis obliqua. | volatile organic compounds derived from non-host plants, ocimum basilicum, rosmarinus officinalis, corymbia citriodora, and ruta graveolens, can be used to mask host plant odors, and are repellent to the tea geometrid, ectropis obliqua. volatile compounds were collected by headspace absorption, and the components were identified and quantified by using gas chromatography/mass spectrometry. the responses of antennae of female e. obliqua to the compounds were evaluated with gas chromatography/elec ... | 2013 | 24043430 |
| in silico stereo-electronic analysis of pmd (p-menthane-3-8-diol) and its derivatives for pharmacophore development may aid discovery of novel insect repellents. | pmd (p-menthane-3-8-diol) is an insect repellent that can be synthesized chemically or derived from a steam distillate residue of the leaves of lemon eucalyptus, corymbia citriodora. it is one of the few natural product endorsed by the center for disease control (usa) for topical application to protect against mosquitoes though it is not as effective as the common repellent deet (n,n -diethyl-1,3-toluamide). however, deet has several undesirable side effects and toxicity too. thus, although pmds ... | 2013 | 24010930 |
| enantioselective effects of (+)- and (-)-citronellal on animal and plant microtubules. | citronellal is a major component of corymbia citriodora and cymbopogon nardus essential oils. herein it is shown that whereas (+)-citronellal (1) is an effective microtubule (mt)-disrupting compound, (-)-citronellal (2) is not. quantitative image analysis of fibroblast cells treated with 1 showed total fluorescence associated with fibers resembling that in cells treated with the mt-disrupting agents colchicine and vinblastine; in the presence of 2, the fluorescence more closely resembled that in ... | 2013 | 23947826 |
| association genetics in corymbia citriodora subsp. variegata identifies single nucleotide polymorphisms affecting wood growth and cellulosic pulp yield. | wood is an important biological resource which contributes to nutrient and hydrology cycles through ecosystems, and provides structural support at the plant level. thousands of genes are involved in wood development, yet their effects on phenotype are not well understood. we have exploited the low genomic linkage disequilibrium (ld) and abundant phenotypic variation of forest trees to explore allelic diversity underlying wood traits in an association study. candidate gene allelic diversity was m ... | 2012 | 22680066 |
| a comparison of greenhouse gas emissions from inputs into farm enterprises in southeast queensland, australia. | one of the assumptions underlying efforts to convert cropping land, especially marginal crop land, to plantations is that there will be a net reduction in greenhouse gas emissions, with a gas "sink" replacing a high energy system in which the breakdown of biomass is routinely accelerated to prepare for new crops. this research, based on case studies in kingaroy in southeast queensland, compares the amount of greenhouse gas (ghgs) emissions from a peanut/maize crop rotation, a pasture system for ... | 2007 | 17129942 |
| pmd, a registered botanical mosquito repellent with deet-like efficacy. | para-menthane-3,8-diol(pmd) is a monoterpene spent product of the distillation of leaves of the australian lemon-scented gum tree (updated nomenclature corymbia citriodora ssp. citriodora). in april 2005, the u.s. centers for disease control and prevention (cdc) endorsed two non-deet mosquito repellents, including pmd. however, few mosquito professionals have in-depth familiarity with the history and efficacy of pmd. in this article, we describe the origin and development of pmd as a repellent a ... | 2006 | 17067054 |
| quantification of particle number and mass emission factors from combustion of queensland trees. | the quantification of particle emission factors under controlled laboratory conditions for burning of the following five common tree species found in south east queensland forests has been studied: spotted gum (corymbia citriodora), blue gum (eucalyptus tereticornis), bloodwood (eucalyptus intermedia), iron bark (eucalyptus crebra), and stringybark (eucalyptus umbra). the results of the study show that the particle number emission factors and pm2.5 mass emission factors depend on the type of tre ... | 2006 | 17007128 |
| in vitro plantlet formation by organogenesis in e. camaldulensis and by somatic embryogenesis in eucalyptus citriodora. | adventitious shoots were formed through callus on leaf explants of eucalyptus camaldulensis dehnh. (river red gum) taken from shoot cultures of mature trees. callus formed in dark on a medium containing 1 g/l casein hydrolysate, 3 mg/l 1-naphthaleneacetic acid, 0.1 mg/l 6-benzyladenine and 50 g/l sucrose. shoot initiation occurred in 4 weeks on calli shifted to light on a regeneration medium containing 10% coconut milk, 0.5 mg/l 6-benzyladenine and 20 g/l sucrose. rooting occured in dark on a li ... | 1987 | 24248667 |