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Registros recuperados: 21 | |
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Zanuncio,José Cola; Tavares,Wagner de Souza; Ramalho,Francisco de Sousa; Leite,Germano Leão Demolin; Serrão,José Eduardo. |
Abstract: The objective of this work was to evaluate spatial and temporal distributions of Sarsina violascens (Lepidoptera: Noctuidae: Lymantriinae) in two Eucalyptus cloeziana plantations, one with native vegetation strips (WNVS) and another without them (ONVS). Adults were collected with light traps, which were installed: inside an area of native vegetation (Cerrado), 100 m from the edge; at the contact zone between the native vegetation area and the E. cloeziana plantation; inside the E. cloeziana plantation, 250 m from the edge; at the central part of the native vegetation strip, around 500 m from the edge (WNVS) or in the contact zone between two E. cloeziana compartments (ONVS); and inside the E. cloeziana plantation, 500 m from the edge. The number... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus cloeziana; Sarsina violascens; Habitat fragmentation; Integrated pest management; Plant species richness; Population dynamics.. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000600703 |
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Lustosa,Paulo Rogério; Zanuncio,José Cola; Leite,Germano Leão Demolin; Picanço,Marcelo. |
Este trabalho objetivou estudar a resistência de duas linhagens de soja, do programa de melhoramento do sabor da Universidade Federal de Viçosa, MG, cultivadas sob dois níveis de infestação de percevejos, em comparação com três cultivares de soja. Os genótipos estudados foram: CR-1, CR-3, Cristalina (linhagem paterna), Davis (padrão de suscetibilidade) e IAC-100 (padrão de resistência). CR-1, CR-3, Davis e Cristalina, sob baixa infestação, produziram porcentagens de sementes normais semelhantes entre si (57%), e inferiores às de IAC-100 (77%). Sob alta infestação, CR-1, CR-3 e Cristalina produziram percentagens de sementes normais semelhantes entre si (22%) e inferiores às de Davis (43%) e IAC-100 (59%). Todos os genótipos apresentaram baixo grau de... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Resistência de plantas; Sabor da soja; IAC-100; Davis; Cristalina. |
Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000800004 |
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Leite,Germano Leão Demolin; Picanço,Marcelo Coutinho; Zanuncio,José Cola; Moreira,Márcio Dionizio; Pereira,Paulo Roberto. |
Este trabalho objetivou determinar os efeitos de pluviosidade e temperatura, predadores e parasitóides, dossel e idade das plantas, tipos e densidades de tricomas foliares, compostos químicos foliares, níveis de N e de K foliares, sobre a intensidade de ataque de mosca-branca Bemisia tabaci (Hemiptera: Aleyrodidae) em jiloeiro Solanum gilo var. 'Gigante Portuguesa'. As densidades de ninfas e de adultos de B. tabaci foram maiores nas folhas baixeiras do que nas apicais das plantas de jiloeiro. Com o aumento da temperatura do ar, observou-se incremento na densidade de adultos de B. tabaci nas folhas de jiloeiro. |
Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Solanum gilo; Bemisia tabaci; Aleloquímicos; Efeito climático; Nitrogênio; Potássio. |
Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002000700018 |
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Leite,Germano Leão Demolin; Picanço,Marcelo; Jham,Gulab Newandram; Gusmão,Marcos Rafael. |
Este trabalho objetivou determinar os efeitos da pluviosidade, da temperatura, da umidade relativa, dos predadores e parasitóides, da idade das plantas, dos compostos químicos foliares (cromatógrafo a gás acoplado a espectrômetro de massa - CG/EM), dos níveis de N e de K foliares sobre a intensidade do ataque de Bemisia tabaci biótipo B (Genn.) (Homoptera: Aleyrodidae) em pimentão (Capsicum annuum) var. Myr-10. As correntes totais de íons dos picos 28,178 min. (tempo de retenção) e 42,755 min. (tempo de retenção) correlacionaram-se positivamente com as ninfas e adultos da mosca-branca, respectivamente, e a corrente total de íons do pico 36,352 min. (tempo de retenção) correlacionou-se negativamente com ninfas deste inseto. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum annuum; Bemisia tabaci; Aleloquímico; Nitrogênio; Potássio. |
Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002000800019 |
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Picanço,Marcelo; Leite,Germano Leão Demolin; Mendes,Márcio C.; Borges,Valdivino Enedino. |
Estudou-se o efeito da textura do solo, relevo, espécie forrageira, idade e sistema de formação da pastagem, sobre o ataque de Atarsocoris brachiariae. Não foram observadas diferenças significativas entre as espécies de forrageiras ou tipo de relevo quanto ao ataque da praga. As maiores densidades foram observadas em solos de textura arenosa, pastagens com mais de quatro anos, sistema de formação convencional e na faixa de 20-30 cm de profundidade. O ataque foi em reboleiras, e a maior densidade ocorreu na região de transição entre a área de pastagem morta e a área em que esta apresentava desenvolvimento normal. |
Tipo: Info:eu-repo/semantics/article |
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Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000500022 |
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Lazo,Jatnel Alonso; Valdés,Nurys Valenciaga; Sampaio,Regynaldo Arruda; Leite,Germano Leão Demolin. |
El objetivo de este trabajo fue evaluar la diversidad zoológica asociada a un silvopastoreo con leucaena-guinea, por medio de la caracterización de la composición y estructura de las aves, insectos y la macrofauna del suelo, en cuatro edades de establecimiento (3, 4, 5 y 6 años de explotación). Con las especies registradas en cada uno de estos grupos zoológicos, se calcularon los índices ecológicos: número de individuos, riqueza, diversidad y abundancia de especies, en diferentes edades del sistema. En todos los grupos, se apreció el aumento significativo en la riqueza de especies y en el índice de diversidad biológica de Shannon, en la medida que se desarrolló el sistema. Se observó incremento en la abundancia de insectos biorreguladores y, en relación... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leucaena leucocephala; Panicum maximum; Aves; Insectos; Macrofauna; Sostenibilidad. |
Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007001200001 |
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Leite,Germano Leão Demolin; Picanço,Marcelo; Jham,Gulab Newandram; Moreira,Márcio Dionízio. |
Kale Brassica oleracea var. acephala is attacked by whitefly Bemisia tabaci, aphid Brevicoryne brassicae and Thrips tabaci. One of the main reasons for extensive insecticide application is the lack of information about factors that control insect population. The objectives of this study were to investigate the relationships between predators and parasitoids, organic compound leaves, levels of leaf nitrogen and potassium, total rainfall, relative humidity, sunlight and median temperature on the abundance of whitefly, aphid, and thrips in kale genotype "Talo Roxo". The beating tray method, direct counting and magnifying lens were used to estimate the number of these pests, predators and parasitoids. Median temperature, sunlight and relative humidity... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Population dynamics; Nonacosane; Climatic factors; Braconidae. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000300001 |
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Leite,Germano Leão Demolin; Picanço,Marcelo; Jham,Gulab Newandram; Moreira,Márcio Dionízio. |
The objective of this work was to investigate the relationships between predators and parasitoids, leaf chemical composition, levels of leaf nitrogen and potassium, total rainfall, relative humidity, daylight and median temperature on the intensity of whitefly, aphid, and thrips attack on cabbage. Whitefly, aphids and thrips population tended to proliferate in the final stage of plant or reached a peak population about 40 days after plantation. The whitefly and thrips tended to increase with an increase in the median temperature. A dependence of Cheiracanthium inclusum and Adialytus spp. populations on whitefly and aphids populations, respectively, was observed. No significant effect was detected between K and nonacosane leaf content and aphid population.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bemisia tabaci; Brevicoryne brassicae; Thrips tabaci; Brassica oleracea; Temperature; Nonacosane. |
Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006001000003 |
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Leite,Germano Leão Demolin; Picanço,Marcelo; Guedes,Raul Narciso Carvalho; Ecole,Carvalho Carlos. |
The objective of this work was to determine the effects of rainfall, temperature, predators, parasitoids, plant age, leaf chemical composition, levels of leaf nitrogen and potassium, besides density of leaf trichomes, on attack intensity of Bemisia tabaci biotype B on the Cucumis sativus. An increase in the number of whitefly adults and nymphs per leaf was observed with plant aging. A higher number of whitefly adults per leaf and eggs cm-2 was verified in the apical part than in the middle and bottom part of the plants canopy. However, the higher number of whitefly nymphs was observed in the mid-part than in the apical and bottom part of the plant canopy. The incidence of whitefly nymphs was negatively affected with foliar nitrogen. Pentacosane and... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis sativus; Whitefly; Allelochemicals; Nitrogen; Trichomes. |
Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000800005 |
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Leite,Germano Leão Demolin; Picanço,Marcelo; Jham,Gulab Newandram; Moreira,Márcio Dionízio. |
The control of whitefly Bemisia tabaci (Gennadius) biotype B (Hemiptera: Aleyrodidae) on okra (Abelmoschus esculentus L.) consists primarily in the use of insecticides, due to the lack of information on other mortality factors. The objective of this study was to evaluate the spatial and temporal population dynamics of the whitefly B. tabaci biotype B on two successive A. esculentus var. "Santa Cruz" plantations. Leaf chemical composition, leaf nitrogen and potassium contents, trichome density, canopy height, plant age, predators, parasitoids, total rainfall and median temperature were evaluated and their relationships with whitefly on okra were determined. Monthly number estimates of whitefly adults, nymphs (visual inspection) and eggs (magnifying lens)... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bemisia tabaci; Abelmoschus esculentus; Natural enemies; Plant phenology; Temperature. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000100003 |
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Leite,Germano Leão Demolin; Veloso,Ronnie Von dos Santos; Silva,Farley Willian Souza; Guanabens,Rafael Eugênio Maia; Fernandes,G. Wilson. |
For the first time, we identified the insect herbivore that induces one of the most conspicuous galls on the leaves of Caryocar brasiliense Camb. (Caryocaraceae), a widespread, typical cerrado woody plant of large economic importance. The gall inducing organism is a new and undescribed species of Eurytoma sp. (Hymenoptera, Eurytomidae). Furthermore, we recorded its spatial distribution within C. brasiliense trees. More Eurytoma galls were found on the eastern tree slope, followed the southern and northern slopes. More galls were found in the interior of the tree crown, i.e., on the proximal portion of the stems compared to the terminal portion. At the leaf level, more galls were found on the median region compared to the distal or proximal, perhaps due to... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado; Insect distribution; Insect galls; Pequi; Trichomes. |
Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262009000400015 |
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Leite,Germano Leão Demolin; D'Ávila,Vinicius de Abreu; Cerqueira,Vinicius Matheus; Nascimento,Aline Fonseca do; Fernandes,G. Wilson. |
We obtained the first data on spatial distribution of a spherical galling insect (Hymenoptera, Eulophidae) at the Caryocar brasiliense Camb. (Caryocaraceae) tree level. This work was developed in two pastures in Montes Claros, Minas Gerais State, Brazil. The areas studied were: pasture 1 (in activity) and pasture 2 (abandoned pasture = savanna in recovery). We evaluated the distribution of spherical galls in: foliage orientation (slope), among leaves (border and interior of the tree crown), among leaflets (right, central, left), distal, median, and proximal as well as border, central area, and adjacent to the mid leaf vein of the leaflet, and difference between areas in 10 infested trees per area. The smaller number of spherical gall/leaflet was observed... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado; Galling insects; Insect distribution; Pequi. |
Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000300013 |
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Leite,Germano Leão Demolin; Moreira,Elwira Daphinn Silva; Mota,Verônica Alves; Ferreira,Izabel Cristina Pereira Vaz; Costa,Cândido Alves da. |
Os objetivos desta pesquisa foram verificar os artrópodes fitófagos e seus predadores em 20 acessos de bucha vegetal Luffa sp. (Cucurbitaceae), a distribuição destes no dossel das plantas em cultivo orgânico e a produção de frutos dos acessos. O experimento foi em blocos casualizados com 20 tratamentos e quatro repetições. Os tratamentos foram os acessos P159, P304, P466, P03, P570, P569, P467, P30, P446, P495, P125, P263, P644 e P32, provenientes da Embrapa (CENARGEN, DF), e P01, P02, P04, P05, P06 e P07, obtidos em Porteirinha-MG. As parcelas foram compostas por quatro plantas de Luffa sp. A maior abundância de Diabrotica speciosa (Germar) (Coleoptera: Chrysomelidae) foi observada nas folhas do acesso P467 em referência aos demais acessos de Luffa sp.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bucha vegetal; Inseto; Inimigos naturais. |
Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902011000400022 |
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Picanço,Marcelo; Casali,Vicente Wagner Dias; Oliveira,Ivênio Rubens de; Leite,Germano Leão Demolin. |
The Hymenoptera fauna associated to Solanum gilo was studied. There were 21 species of Hymenoptera from eight families. It was observed Homalotylus flaminus (Dalman, 1820) (Encyrtidae) parasiting the adults of Cycloneda sanguinea Linnaeus, 1763 (Coleoptera, Coccinellidae) and Chalcididae parasiting caterpillars of Mechanitis pofymnia casabranca Haensch, 1905 (Lepidoptera, Nymphalidae, Ithomiinae, Sthomiinae). Vespidae were observed preying both M. pofymnia casabranca and Diabrotica speciosa Germar, 1824 (Coleoptera, Chrysomelidae) adults. Halictidae, Andrenidae and Anthophoridae, were observed visiting flowers and Trigona spinipes (Fabricius, 1793) (Apidae) attacking fruits and stem ápices. The most abundant Hymenoptera were Formicidae; Cremalogaster sp.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Entomofauna; Population dynamics; Protocooperation. |
Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000400006 |
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Leite,Germano Leão Demolin; Picanço,Marcelo; Zanuncio,José Cola; Ecole,Carvalho Carlos. |
The objective of this study was to evaluate effects of total rainfall, mean temperature, natural enemies, chemical composition of leaves, levels of nitrogen and potassium on leaves and density of leaf trichomes on attack intensity of Thrips palmi Karny (Thysanoptera: Thripidae) and Aphis gossypii (Glover) (Homoptera: Aphididae) on plantations of the eggplant (Solanum melongena) in two regions of Minas Gerais, Brazil. Higher numbers of A. gossypii/leaf and T. palmi/leaf were observed in plantations of this eggplant in the Municipalities of Viçosa and Guidoval, respectively. Guidoval had a rainy and hotter weather than Viçosa. T. palmi was almost positivelly correlated with rainfall (r= 0.49, P= 0.0538) while A. gossypii seemed to be more affected by mean... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphis gossypii; Natural enemies; Plant nutrition; Solanum melongena; Thrips palmi. |
Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000400002 |
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Soares,Marcus Alvarenga; Leite,Germano Leão Demolin; Zanuncio,José Cola; Sá,Veríssimo Gibran Mendes de; Ferreira,Cleidson Soares; Rocha,Silma Leite; Pires,Evaldo Martins; Serrão,José Eduardo. |
The objective of this work was to assess the flight capacity, parasitism and emergence of Trichogramma atopoviriliaand two strains of T. pretiosum (Hymenoptera: Trichogrammatidae) (L1 and L2). The flight capacity of these species was assessed in test units consisting of a plastic PVC cylinder with a rigid transparent plastic circle on the upper part and an extruded polystyrene disk closing its bottom. A tube was placed in each test unit containing a card with 300 Anagasta kuehniella (Lepidoptera: Pyralidae) eggs parasitised by Trichogramma. These cards were assessed to determine the parasitism rate and adult emergence of these natural enemies. T. atopovirilia and T. pretiosum L1 presented adequate flight capacity and parasitism, in addition to high... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological control; Flight; Parasitism; Quality control; Emergence. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000200018 |
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Leite,Germano Leão Demolin; Picanço,Marcelo; Zanuncio,José Cola; Gusmão,Marcos Rafael. |
The control of Aphis gossypii Glover (Hemiptera: Aphididae) on okra Abelmoschus esculentus (L.) (Malvaceae) consist primarily in the use of insecticides, due to the lack of information on other mortality factors. The objective of this study was to determine the effects of predators and parasitoids, height of canopy, plant age, leaf areas, organic compounds leaves, levels of leaf nitrogen and potassium, density of leaf trichomes, total rainfall and median temperature on attack intensity of A. gossypii on two successive A. esculentus var. Santa Cruz plantations. Monthly number estimates of A. gossypii and natural enemies (visual inspection) occurred on bottom, middle and apical parts of 30 plants/plantation (one leaf/plant). Plants senescence, leaf areas and... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abelmoschus esculentus; Aphid; Natural enemies; Leaf area; Nitrogen. |
Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542007000200011 |
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Registros recuperados: 21 | |
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