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Search Results: 1 - 10 of 1899 matches for " Citrus sinensis "
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Produtividade e qualidade dos frutos da laranjeira 'Pêra' clone IAC em 16 porta-enxertos na regi?o de Bebedouro-SP
Stuchi, Eduardo Sanches;Donadio, Luiz Carlos;Sempionato, Otávio Ricardo;Perecin, Dilermando;
Revista Brasileira de Fruticultura , 2004, DOI: 10.1590/S0100-29452004000200044
Abstract: an experiment was set up in july 1993, at bebedouro city, s?o paulo state, brazil, aiming to evaluate the rootstock influence on the yield and several physical and chemical fruit characteristics such as fruit size, total soluble solids, acidity, ratio juice content and technological index of 'pera' iac sweet orange [citrus sinensis (l.) osbeck], in a high inoculum pressure area of citrus variegated chlorosis (cvc). the spacement was 6.0 m between rows and 3.5 m between trees. the experimental design used was randomized blocks, with three replications and two trees per plot. the rootstocks tested were 'sun chu sha kat' mandarin (citrus reticulata), 'pectinífera' (c. reticulata), 'shekwasha' (c. depressa hayata), 'pectinífera/shekwasha' (c. depressa hayata), 'batangas' (c. reticulata), 'oneco' (c. reticulata), citrangor [citrange (poncirus trifoliata raf. x c. sinensis) x c. sinensis], citrandarin (c. sunki hort. ex tanaka x poncirus trifoliata l. raf. cv. english), 'sunki' (c. sunki), 'suen-kat' (c. sunki), nasnaran (c. amblycarpa ochse), 'venezuela' mandarin (c. reticulata), 'heen naran' mandarin (c. lycopersicaeformis), 'cravo' (c. limonia osbeck) x 'cleopatra' (c. reshni hort ex tanaka), 'cravo' (c. limonia), 'cleopatra' (c. reshni). cvc intensity was different due to rootstocks effects and not related with yield until the fourth year of production. with the exception of the nasnaran mandarin the rootstocks induced initial fruit production and quality similar to 'cravo'.
Prati, Patricia;Mour?o Filho, Francisco de Assis Alves;Dias, Carlos Tadeu dos Santos;Scarpare Filho, Jo?o Alexio;
Scientia Agricola , 1999, DOI: 10.1590/S0103-90161999000100025
Abstract: the effect of various concentrations and exposure times of two plant growth regulators on root formation of stem cuttings of `tahiti' lime (citrus latifolia tanaka) was evaluated. additional trials evaluated and compared root formation efficiency of stem cuttings of two sweet orange cultivars (citrus sinensis l. osbeck). the research was carried out in piracicaba, sp, brazil, in an screen-house with an intermitent water spray system, using 10 cm long, five month old terminal semihardwood stem cuttings, without the three basal leaves. the experimental design consisted of randomized blocks, with four replications in all trials. data was collected 90 days after the beginning of each trial. the parameters analysed were: average number of roots per rooted cutting, percentage of rooting, percentage of callus induction, average length of the longest root, and average number of leaves per rooted cutting. the results showed that: a) rooting of `tahiti' lime cuttings was high, above 50%, reaching up to 96% in some cases, with no effect of the application of any plant growth regulator; b) sweet orange cuttings presented low percentage of root formation (around 0,5%), with no effect of the application of any plant growth regulator; c) there were no significant differences among the treatments for all the other parameters; d) the present study showed that plant propagation of `tahiti' lime through stem cuttings is an efficient and fast propagation method for this citrus species.
Remiss?o de sintomas iniciais do declínio de citros pela aplica??o de reguladores vegetais
Prates, H.S.;Castro, P.R.C.;Guirado, N.;Melotto, E.;Muller, G.W.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1988, DOI: 10.1590/S0071-12761988000100016
Abstract: for the experiment 13 year old pera sweet orange on rangpur lime stionic combinations from a plot in the mogi-gua?u county, s?o paulo state, were choosen. all plants showed in january 1984, unilateral brazilian decline (blight) symptoms. the diseased state of the plants was further confirmed by low water uptake. the statistically design was by completely randomized blocks, with 6 treatments, 4 replications and 1 tree per plot. the following growth regulator treatments were applied: 1) check; 2) gibberellic acid (ga) at 100ppm + 2,4-dichlorophenoxyacetic acid (2,4-d) at l0ppm; 3) ga at 50ppm + 2,4-d at 10ppm; 4) ga at 50ppm + naa at 15ppm + biofertilizer at 1ml/lwater; 6) ethyl-5-chlorine 1 h-3-indazolyl acetate (ethilclozate) at 0,1ml/l water. the products were applied in january 85. the growth regulators were applied as foliar sprays to thoroughly wet the leaves. five evaluation on the plant reactions were undertaken, respectively at 100,193,276,346 and 405 days from the first application of the products. the results obtained based on a visual score and kruskal-wallis test showed that treatments with ga at 50ppm + naa at 20ppm, ga at 100ppm + 2,4-d at 10ppm, and ga at 50ppm+naa at 15ppm+ bifertilizer at 1ml/lwater, presented satisfactory degree of symptoms remission that differed statistically from the check. this amelioration however found no parallelism to the results obtained by the water uptake test that still showed low levels. those figures however were a little higher in the treated plants than in the checks. these experiments will be continued for a few more years to determine whether or not the symptoms remission in the foliage is permanent and will lead eventually to the improvement of the whole plant.
Azteca barbifex Forel (Hymenoptera: Formicidae): potential pest of citrus crops in eastern Amazon
Farias, Paulo R S;Harada, Ana Y;Silva, Anderson G;Monteiro, Bruno S;Rodrigues, Nara E L;Santos, Naira A;
Neotropical Entomology , 2010, DOI: 10.1590/S1519-566X2010000600035
Abstract: damage caused by the ant azteca barbifex (forel) was identified in orange trees (citrus sinensis), in capit?o po?o county, guamá microregion, pará state. the damage caused by the scraping of stems and branches lead to reduction in yield with subsequent death of the plant. these characteristics indicate a. barbifex as a potential pest of citrus crops in the eastern region of amazon.
Argyrotaenia sphaleropa (Meyrick) (Lepidoptera: Tortricidae) in citrus in the State of Paraná, Brazil
Meneguim, Ana M.;Hohmann, Celso L.;
Neotropical Entomology , 2007, DOI: 10.1590/S1519-566X2007000200023
Abstract: argyrotaenia sphaleropa (meyrick) is associated with various fruit species in south america. this tortricid was first detected in citrus, citrus sinensis (l.) osbeck, in brazil, in commercial groves in northern paraná, during the 1994/95-crop season. the aim of this work was to study the biology of this lepidopteran under laboratory conditions (28 ± 2oc, 70 ± 10% ur, 14h photofase) using the citrus cultivar pêra. larvae obtained from egg masses collected in a commercial citrus grove in rolandia, pr, were individually placed on citrus terminal leaves inside glass shell vials (8.5 x 2.5 cm) until adulthood. a male and a female moth were then transferred to acrylic cages (13 x 10 cm) containing inside a bouquet made with new citrus flush to serve as oviposition substrate. adults were fed daily with a 10% honey solution. the biological parameters evaluated were duration of development of egg, larval and pupal stages; pupae weight; duration of pre-oviposition and oviposition periods, fecundity and longevity. the length of the egg to adult stage was around 36 days. the pre-oviposition period was almost two days, the oviposition period approximately ten days and the embryonary period around six days. adult longevity was almost 15 days for females and nine days for males, and the lifetime fecundity was slightly over 180 eggs.
Flutua??o populacional de cigarrinhas vetoras de Xylella fastidiosa Wells et al. em pomares comerciais de citros no noroeste do Paraná
Nunes, William M.C.;Molina, Rúbia de O.;Albuquerque, Fernando A. de;Corazza-Nunes, Maria J.;Zanutto, Carlos A.;Machado, Marcos A.;
Neotropical Entomology , 2007, DOI: 10.1590/S1519-566X2007000200012
Abstract: the citrus variegated chlorosis (cvc), an important disease of citrus in brazil, is caused by the bacterium xylella fastidiosa wells et al. and transmitted by xylem-feeding sharpshooters (hemiptera: cicadellidae). this study evaluated the fluctuation of populations of species of sharpshooters belonging to the tribes cicadellini and proconiini, from subfamily cicadelinae, in a commercial sweet orange [citrus sinensis (l.) osb.] grove, located in the northwest region of paraná state, brazil, in four varieties: valência, natal, pêra, and folha murcha. sharpshooters population was monitored using yellow stick traps sampled at 15 day-intervals, in 24 traps, from november of 1999 to march of 2004. the most abundant species were dilobopterus costalimai young (tribe cicadellini) and acrogonia citrina marucci & cavichioli (tribe proconiini). both species were detected during the complete period studied, which is important because they have great potential for transmitting cvc. thus, since more than a sharpshooter species were detected, more efforts are recommended to monitor and control these insects in citrus groves, aiming to reduce the dissemination of cvc.
Araújo, Paulo Sérgio Rodrigues de;Mour?o Filho, Francisco de Assis Alves;Sposito, Marcel Bellato;
Scientia Agricola , 1999, DOI: 10.1590/S0103-90161999000100022
Abstract: percentage of fruit set was studied in four quadrants (southeast, northeast, southwest and northwest) in three different crown heights (low, medium and high) during five periods of flowering and fruit development. the research was conducted in piracicaba, sp, brazil (22o43's; 47o38'w; 540m). the experimental design was randomized blocks in an 3x4x5 factorial, with 300 split-split plots. data collected included number of flowers (first count) and number of fruits (in the other four counts). southeast medium height presented the highest number of flowers. there was no difference among heights for number of flowers. fruit set was different among heights. southwest basal part of the plants showed the highest percentage of fruit set.
Malaysian Journal of Pharmaceutical Sciences , 2009,
Abstract: Citrus sinensis is native to Asia and throughout the Pacific and warm areas of the world. The ethyl acetate extract of the roots of Citrus sinensis yielded a flavonoid. The compound was characterizedas 5, 8-dihydroxy-6, 7, 4′-trimethoxyflavone on the basis of UV, I.R, mass and N.M.R (1H, 13C) spectral studies. We believe this is the first report describing the isolation of flavonoid from thisplant.
Araújo Paulo Sérgio Rodrigues de,Mour?o Filho Francisco de Assis Alves,Sposito Marcel Bellato
Scientia Agricola , 1999,
Abstract: Observou-se o pegamento de frutos de laranjeira `Pera' enxertada sobre limoeiro `Cravo' em rela o aos quadrantes geográficos (Sudeste, Nordeste, Sudoeste e Noroeste) nos diferentes ter os da copa (basal, mediano e apical) em cinco períodos de coleta. O trabalho foi conduzido em Piracicaba-SP, com localiza o 22o43'S, 43o38'W e 540 metros de altitude. O delineamento experimental foi em blocos ao acaso, considerando-se cada planta um bloco, no esquema fatorial 3x4x5, perfazendo um total de 300 sub-subparcelas. Os parametros avaliados foram o número de flores (1a coleta) e frutos (chumbinhos, nas quatro coletas subsequentes), analisando-se separadamente o 1o período e conjuntamente os demais. Os resultados permitiram observar uma diferen a significativa a nível de 5% tanto para o número de flores em rela o aos quadrantes, destacando-se o SE, como para a intera o alturas x quadrantes, destacando-se o ter o mediano dentro do referido quadrante que diferiu dos demais. N o foi detectada diferen a significativa entre as alturas. Com rela o a percentagem de chumbinhos, foi possível distinguir uma diferen a significativa ao nível de 5% entre as alturas, os quadrantes e períodos, destacando-se o ter o basal e o quadrante SO. A intera o do quadrante dentro da altura e vice-versa, n o apresentou diferen a significativa, embora que no decorrer dos períodos, o comportamento tenha sido semelhante, independente do quadrante ou altura.
In-Vitro Regeneration of Citrus sinensis (L.) Osbeck from Mature Seed Derived Embryogenic Callus on Different Solid Basal Media  [PDF]
Md. Nazmul Hasan, Mohammed Raqibul Hasan, Shakhawat Hossain Foysal, Hammadul Hoque, Md. Fahim Khan, Md. Fahmid Hossain Bhuiyan, Shamsul H. Prodhan
American Journal of Plant Sciences (AJPS) , 2019, DOI: 10.4236/ajps.2019.102022
Abstract: In-vitro callus induction and regeneration method was developed using different plant growth regulators (PGRs), and basal media (Murashige and Skoog (MS), CHU (N6) and Gamborg (B5) media) of Citrus sinensis (L.) Osbeck. Observations of the effect of PGRs were carried out using different concentrations of 2,4-dichlorophenoxyacetic acid (2,4-D),1-naphthalene acetic acid (NAA) and combinations of 2,4-D and NAA using different basal media. This study found Citrus sinensis (L.) Osbeck exhibited a high frequency of callus induction on MS medium supplemented with 3 mg/L 2,4-D and callus induction frequency was 86.7% ± 3.4% whereas N6 and B5 showed lower callus induction frequency of 83.3% ± 8.8% and 82.2% ± 1.9% respectively
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