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Registros recuperados: 221 | |
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SALIBA,Ivy Laura; LUNZ,Alexandre Mehl; BATISTA,Telma Fátima; SCHWARTZ,Gustavo. |
ABSTRACT Thaumastocoris peregrinus (Hemiptera, Thaumastocoridae) is a phytophagous pest of eucalyptus plantations. It was introduced in Brazil in 2008, and expanded rapidly due to its adaptive capacity to different climatic conditions. Eucalyptus has been planted in the Brazilian Amazon since the 1980s, being used in silvopastoral systems and for cellulose production. Since its introduction in the southernmost Brazilian state of Rio Grande do Sul, T. peregrinus has expanded its geographical distribution to 117 municipalities in states in the south (Rio Grande do Sul, Santa Catarina and Paraná), southeast (São Paulo, Espirito Santo, Rio de Janeiro and Minas Gerais), mid-west (Mato Grosso do Sul and Goiás) and northeast (Sergipe) of the country. Here we... |
Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Insect pest; Bronze bug; Occurrence; Eucalyptus; Brazilian Amazon. |
Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000300179 |
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ZANUNCIO,Teresinha Vinha; ZANUNCIO,José Cola; CRUZ,Adalton Pinheiro; VINHA,Eloisio. |
Essa pesquisa foi conduzida no laboratório de Entomologia Florestal da Universidade Federai de Viçosa à 25 ± 2" C, 60 ± 10% UR e fotoperiodo de 12L:12E. O objetivo foi estudar a biologia de Nystalea nyseus(Cramer, 1775) (Lepidoptera: Notodontidae) em folhas de Eucalyptus urophylla. Ν. nyseusapresentou cinco estádios, com duração, média, de 3,99 ± 0,11; 3,80 ±0,10; 4,95 ± 0,30; 5,96 ±0,21 e 6,85 ±0,14 dias, respectivamente. A duração total da fase larval foi de 25,5 dias. A fase de pré-pupa teve duração de 3,05 ± 0,05; 3,08 ± 0,06 dias e a de pupa 14,75 ± 0,45 c 13,82 ± 0,29 dias para machos e fêmeas, respectivamente. A viabilidade, dos ovos, foi de 74,72% e o período embrionário de 3,40 ± 0,16 dias. A longevidade de adultos, acasalados, foi de 6,71 ± 0,74... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Desfolhador de eucalipto; Lepidoptera; Nystalea nyseus; Eucalyptus. |
Ano: 1994 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671994000200153 |
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Einali,Alireza; Mazang-Ghasemi,Sahar; Valizadeh,Jafar; Noorozifar,Meisam. |
ABSTRACT The present work investigated the effects of aqueous extracts of eucalyptus ( Eucalyptus globulus) and elderberry ( Sambucus ebulus) leaves on β-carotene productivity in Dunaliella salina, a green microalga. Leaf extracts from eucalyptus have greater amounts of phenolics and flavonoids, as well as greater ferric reducing antioxidant potential than elderberry. The extracts of both species greatly inhibited growth of algal suspensions. However, chlorophyll and β-carotene concentration increased in cells treated with leaf extracts, and the highest values were detected in 1 % eucalyptus and 2 % elderberry extracts. Fresh weight, total sugar, and protein content significantly increased following exposure of cells to different doses of leaf extracts.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Β-carotene; Dunaliella salina; Eucalyptus; Elderberry; Leaf extracts; Metabolites; Stress. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200180 |
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Santos,Valéria Barros dos; Wellbaum,Christian; Schoenlein-Crusius,Iracema Helena. |
Foi estudada a diversidade dos fungos do solo da Ilha dos Eucaliptos na Represa do Guarapiranga em São Paulo, SP, sob floresta de Eucalyptus, mata de interseção e mata secundária remanescente, em duas épocas climáticamente distintas: março - época quente e úmida (verão) e junho - época fria e seca (inverno) de 1996. Os fungos filamentosos foram isolados pelos métodos da diluição em série e placa de solo. A similaridade entre as micotas foi estabelecida pelo índice de Sörensen. No total foram obtidos 44 táxons de fungos (Zygomycota, Ascomycota e fungos mitospóricos), distribuídos em 92 ocorrências. No solo sob a floresta de Eucalyptus spp. foram encontrados 20 táxons (31 ocorrências) de fungos, no solo da interseção 32 táxons (38 ocorrências) e no solo da... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fungos terrestres; Vegetação; Eucalyptus; Sistema lêntico. |
Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061998000100008 |
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Souza, Helenize Gabriela de; UNESP; Doria, Karolina Marie Alix Benedictte Van Sebroech; UNESP; Basseto, Marco Antonio; UNESP; Rosa, Daniel Dias; UNESP-FCA, Programa de Pós-graduação em Proteção de Plantas; Furtado, Edson Luiz; UNESP; Marino, Celso Luis; UNESP - IBB, Depto de Genética. |
No melhoramento genético de espécies florestais, uma população base ou indivíduos superiores pré-selecionados tem importância fundamental para a manutenção do programa. Indivíduos de melhores procedências e de ampla base genética propiciam a obtenção de ganhos de forma contínua. O objetivo deste trabalho foi avaliar a diversidade genética em duas populações-núcleo de Eucalyptus grandis. Foram avaliados 39 indivíduos, sendo 19 pertencentes à população 1 e 20, à população 2, utilizando-se 14 primers microssatélite. Os fragmentos foram identificados e analisados a partir dos programas GeneScan e Genotyper, utilizando-se um sequenciador automático ABI Prism 3100. O número de alelos encontrados para cada primer variou de cinco a 15 para a população 1 e, de 8 a... |
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Palavras-chave: 5.01.03.05-9 populações-núcleo; Eucalyptus; Melhoramento; Microssatélites Melhoramento genético Florestal nucleus populations; Eucalyptus; Improvement; Microsatellites. |
Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3727 |
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Carvalho, Zaqueu Gonçalves; Sales, Eleuza Clarete Junqueira de; Monção, Flávio Pinto; Vianna, Maria Celuta Machado; Silva, Edilane Aparecida; Queiroz, Domingos Sávio. |
his study aimed to evaluate the effect of different doses of nitrogen fertilization on the morphogenic, structural, productive and chemical composition of Urochloa decumbens (Stapf) R. D. Webster cv. Basilisk in a silvopastoral system with eucalyptus. The experimental treatments consisted of pastures of Basilisk cultivar, fertilized with 0, 100, 200, 300 and 400 kg ha-1 year-1 of N, and intercropped with eucalyptus, clone GG 100 (Eucalyptus grandis x E. urophylla). The experimental arrangement followed a randomized block design with four replicates. The evaluated characteristics were: foliar appearance rate, phyllochron, leaf length, leaf elongation rate, leaf life span, foliar senescence rate, number of green leaves per tiller, number of senescent leaves... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências Agrárias; Zootecnia; Forragicultura e Pastagens chemical composition; Dry matter production; Eucalyptus; Leaf elongation rate; Urochloa decumbens.. |
Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/39190 |
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Majer,Jonathan D.; Recher,Harry F.. |
Vast areas of Brazil are being planted to Eucalyptus in order to provide renewable sources of timber, charcoal and cellulose. Although the rapid growth and productivity of various Eucalyptus species undoubtedly relaxes the pressure on logging of native forests, there are ecological costs. Firstly, some eucalypt species are vulnerable to pest outbreaks. A large number of native Lepidoptera, Coleoptera and leaf-cutting ants (Atta spp.), some of which have become pests, have been found on eucalypts growing in Brazil. Probably, the diverse myrtaceous flora of South America supports a fauna that can adapt to the introduced Eucalyptus species. Secondly, the leaf litter produced under Eucalyptus plantations differs substantially from that of native forests both... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Biodiversity; Conservation; Eucalyptus; Plantations; Pests. |
Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591999000200001 |
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Sebei,Khaled; Sakouhi,Fawzi; Herchi,Wahid; Khouja,Mohamed Larbi; Boukhchina,Sadok. |
BACKGROUND: In this paper, we have studied the essential oils chemical composition of the leaves of seven Eucalyptus species developed in Tunisia. Eucalyptus leaves were picked from trees growing in different arboretums in Tunisia. Choucha and Mrifeg arboretums located in Sedjnene, region of Bizerte (Choucha: E. maideni, E. astrengens et E. cinerea; Mrifeg : E. leucoxylon), Korbous arboretums located in the region of Nabeul, North East Tunisia with sub-humid bioclimate, (E. lehmani), Souiniet-Ain Drahem arboretum located in region of Jendouba (E. sideroxylon, E. bicostata). Essential oils were individually tested against a large panel of microorganisms includingStaphylococcus aureus (ATCC 6539), Escherichia coli (ATCC 25922), Enterococcus faecalis... |
Tipo: Journal article |
Palavras-chave: Eucalyptus; Essential oil; Antibacterial activity; -pinene. |
Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100007 |
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Pereira,Fabricio Fagundes; Zanuncio,Teresinha Vinha; Zanuncio,José Cola; Pratissoli,Dirceu; Tavares,Marcelo Teixeira. |
Pupae of Thyrinteina arnobia (Stoll) and Thyrinteina leucoceraea Rindge (Lepidoptera: Geometridae) were obtained from Eucalyptus cloeziana F. Muell and Eucalyptus urophylla S.T. Blake plants, respectively. Specimens of a parasitoid emerged from T. arnobia pupae and also found parasitising T. leucoceraea pupae in the field were identified as Palmistichus elaeisis Delvare and LaSalle (Hymenoptera: Eulophidae). This is the first report on P. elaeisis parasitizing T. arnobia and T. leucoceraea pupae in natural conditions in Brazil. P. elaeisis also parasitized these hosts and Bombyx mori Linnaeus (Lepidoptera: Bombycidae), Anticarsia gemmatalis Hubner, Pseudaletia sequax Franclemont, Alabama argillacea Huebner (Lepidoptera: Noctuidae), Dirphia moderata Bouvier... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Lepidopterous; Parasitoid. |
Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000200004 |
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Mattos,Silvânia V. M.; Bastos,Esther M.; Dayrell,Ilda O.; Nelson,David L.. |
Thirty-five natural honey samples from three apicultural regions of the state of Minas Gerais, Brazil, were collected from honeybee hives under various climatic conditions over a two-year period. The beehives were located in the districts of Bom Jesus do Amparo, Barão de Cocais and São Gonçalo do Rio Abaixo, all within a 100 km radius of Belo Horizonte, Minas Gerais, Brazil. The pollinic spectrum, color and ash, moisture, K, Fe, Mn, Cu and Zn contents were determined. Elemental analysis were done by flame atomic absorption spectrometry. Accuracy and precision were verified by recovery tests and relative standard deviation, respectively. The mean mineral contents encountered were K = 1130; Mn = 3.88; Fe = 2.79; Zn = 2.34 and Cu = 0.54 µ g/g. During the dry... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Honey; Honey mineral content; Pollinic analysis; Eucalyptus. |
Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000200001 |
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Batista,Tânia Regna; Mendonça,Evânia Galvão; Pádua,Marlúcia Souza; Stein,Vanessa Cristina; Paiva,Luciano. |
ABSTRACT The aim of this study was to induce and analyze embryogenic calli from two types of explants (leaves and meristems) of the hybrid Eucalyptus grandis x Eucalyptus urophylla. Leaves and meristems of plants kept in a nursery were disinfected and inoculated in Petri dishes containing MS culture medium supplemented with different concentrations of the growth regulator dicamba (1.13, 4.52, and 9.04 µM) and without it. At 60 days of culturing, the calli were analyzed by scanning electron microscopy and at 90 days were evaluated by light microscopy in regard to the embryogenic characteristics of the cells. Different type of calli were induced in leaf explants, designated as Type I with light yellow coloring, Type II with dark yellow coloring, and Type III... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomical analyses; Dicamba; Eucalyptus; Somatic embryos; Ultrastructural analyses. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100430 |
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Registros recuperados: 221 | |
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