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Registros recuperados: 28
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Adaptations of two specialist herbivores to movement on the hairy leaf surface of their host, Solanum guaraniticum Hassl (Solanaceae) Rev. Bras. entomol.
Medeiros,Lenice; Boligon,Danessa S..
Plant trichomes can difficult the attachment and movement of small insects. Here, we examine the hypothesis that the success on the use of densely haired hosts by two cassidine species is determined by differential morphology and behavior. Larvae of Gratiana graminea (Klug, 1829) and Gratiana conformis (Boheman, 1854) move on the leaf surface of their host, Solanum guaraniticum Hassl by anchoring their tarsungulus on the trichome rays or by inserting the tarsungulus tip directly into epidermis. This kind of movement is only possible due to a similar tarsungulus shape among the species. Tarsungulus growth pattern is also similar between species, being relatively small on the posterior aperture, matching the diameter of the host plant trichome rays. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cassidinae; Gratiana; Morphological adaptation; Tarsungulus; Trichomes.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262007000200011
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Anatomía foliar y caulinar en especies de Stemodia (Scrophulariaceae) Boletín de la Sociedad
Sosa,Maria De Las Mercedes.
Se describe la estructura anatómica foliar y caulinar en el género Stemodia. Son consideradas siete especies: S. ericifolia (Kuntze) K. Schum., S. hyptoides Cham. & Schltdl., S. lanceolata Benth., S. lobelioides Lehm., S. palustris A. St.-Hil., S. stricta Cham. & Schltdl. y S. verticillata (Mill.) Hassl. Se hallaron diferencias en la epidermis foliar, donde hay variación en el tipo de estomas y de tricomas, y en la forma de las papilas epidérmicas; también en la estructura del mesofilo. Se describen e ilustran cuatro tipos de tricomas considerando si son o no glandulares y el número de células que lo conforman. El estudio de la anatomía caulinar mostró diferencias en cuanto a la presencia de aerénquima cortical y de laguna medular, y el...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf anatomy; Stem anatomy; Trichomes; Stemodia; Scrophulariaceae; Anatomía foliar; Anatomía caulinar; Tricomas; Stemodia; Scrophulariaceae.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722005000100007
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Aspects of leaf anatomy of Kudzu (Pueraria lobata, Leguminosae-faboideae) related to water and energy balance. Repositório Alice
PEREIRA-NETTO, A.B. de; GABRIELE, A.C.; PINTO, H.S..
Kudzu is a cover crop that has escaped cultivation in some subtropical and warm temperate regions. Kudzu has previously demonstrated broad intraspecific physiological plasticity while colonizing new environments. The objective of this paper was to investigate characteristics of kudzu leaflet anatomy that might contribute to its successful growth in climatically distinct environments, and to escape cultivation as well. Fresh and fixed leaflet strips of field-grown plants were analyzed. The lower epidermis of kudzu showed a higher frequency of stomata (147 +- 19 stomata mm-2) than the upper epidermis (26 +- 17 stomata mm-2). The average number of trichomes per square milimeter was 8 for both the upper and the lower epidermis. The average trichome length was...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Cuticle thickness; Ecophysiology; Leaflet anatomy; Stomata; Trichomes; Anatomia de foliolos; Tricomas; Ecofisiologia; Espessura de cuticula; Estomatos.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/handle/doc/100687
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Aspects of leaf anatomy of kudzu (Pueraria lobata, Leguminosae-Faboideae) related to water and energy balance PAB
Pereira-Netto,Adaucto Bellarmino de; Gabriele,Antonio Carlos; Pinto,Hilton Silveira.
Kudzu is a cover crop that has escaped cultivation in some subtropical and warm temperate regions. Kudzu has previously demonstrated broad intraspecific physiological plasticity while colonizing new environments. The objective of this paper was to investigate characteristics of kudzu leaflet anatomy that might contribute to its successful growth in climatically distinct environments, and to escape cultivation as well. Fresh and fixed leaflet strips of field-grown plants were analyzed. The lower epidermis of kudzu showed a higher frequency of stomata (147 ± 19 stomata mm-2) than the upper epidermis (26 ± 17 stomata mm-2). The average number of trichomes per square milimeter was 8 for both the upper and the lower epidermis. The average trichome length was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cuticle thickness; Ecophysiology; Leaflet anatomy; Stomata; Trichomes.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000800006
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Aspects of leaf anatomy of tropical kudzu related to water and energy balance. Repositório Alice
NETTO, A. B. de P.; GABRIELE, A. C.; PINTO, H. S..
No Brasil, a pecuaria (Pueraria phaseoloides Benth, Leguminosae-Faboideae) e tradicionalmente empregada como cultura de cobertura em seringais na regiao amazonica, onde as condicoes climaticas se assemelham as condicoes climaticas tropicais encontradas no sudoeste asiatico, centro de dispersao da especie. Pueraria foi tambem introduzida na regiao sudeste do Brasil, regiao esta caracterizada pela transicao entre os climas tropical e subtropical. Este trabalho teve como objetivo descrever algumas caracteristicas da anatomia foliar de pueraria relacionadas a economia de agua e energia. A epiderme inferior apresentou maior frequencia de estomatos (213 estomatos mm2) quando comparada a epiderme superior (101 estomatos mm2). O numero medio de tricomas por...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Espessura da cuticula; Anatomia de foliolos; Tricomas; Ecofisiologia; Estomatos; Cuticle thickness; Ecophysiology; Leaflet anatomy; Stomata; Trichomes.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/handle/doc/86250
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Attraction of Bucephalogonia xanthophis (Hemiptera: Cicadellidae) to volatiles of its natural host Vernonia condensata (Asteraceae) Scientia Agricola
Bento,José Maurício Simões; Arab,Alberto; Zacarin,Giuliano Grici; Signoretti,André Gustavo Corrêa; Silva,José Wilson Pereira da.
Plant volatiles are important cues for the orientation of herbivorous insects. It is possible that these compounds indicate whether the plant is suitable for feeding and larval development, or for mating aggregation. Vernonia condensata (Asteraceae) is known to attract species of leafhoppers, most of them important vectors of the citrus variegated chlorosis (CVC). In this study, we evaluated the role of volatiles of V. condensata on the orientation of Bucephalogonia xanthophis (Hemiptera: Cicadellidae). Four-arm olfactometer bioassays showed that only males were attracted to the volatiles of the host-plants Citrus sp. and V. condensata. Furthermore, fresh leaves of V. condensata induced a stronger response than volatiles from hexane-extracted leaves. This...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plant-herbivore interaction; Leafhopper; Trichomes.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000600010
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Baybean ( Canavalia rosea (Sw.) DC.); organogenesis, morphological and anatomical studies Gayana Botánica
Mohajer,Sadegh; Taha,Rosna Mat; Mohamed,Normadiha; Razak,Ummi Nur Abdul.
ABSTRACT Morphological and anatomical studies comprised leaf venation, histological analysis and epidermal peeling were carried out on Canavalia rosea (Sw.) DC.). Anatomical studies of the leaf and root determined the presence of cuticle and oil glands, arrangement of cells and the structure of vascular system. The dorsiventral leaf with pinnate venation and amphistomatic leaf with paracytic type stomata were embedded below the epidermis. Trichomes and oil glands were also observed on both adaxial and abaxial surfaces of leaf. Longitudinal sections of the callus showed the existence of meristematic cells, which could give rise to plant regeneration. In the process of organogenesis, adventitious shoots emerged from leaf and stem explants within 2 months...
Tipo: Journal article Palavras-chave: Leaf architecture; Histology; Hormone; 6-benzyladenine; Trichomes; SEM.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432017000100120
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Biological aspects of the beetle Delphastus davidsoni fed with whitefly eggs laid on tomato genotypes Scientia Agricola
Oriani,Maria Auxiliadora de Godoy; Vendramim,José Djair.
Many plant breeding programs have incorporated plant resistance characteristics without considering how this resistance may affect the natural enemies of plant pests. We evaluated the biological aspects of Delphastus davidsoni (Gordon) fed with Bemisia tabaci B biotype eggs laid on tomato genotypes with different trichome densities and types. On LA1335 and NAV1062, the development periods were 21 days, and the larval mortality rates were 46.7 % and 28.9 %, respectively; on IAC294, the development period was 26 days, and the mortality rate 88.9 %. None of the larvae completed development when fed with whitefly eggs laid on PI134418. Most of the deaths took place in the second instar stage because the larvae became trapped in the glandular trichomes; similar...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum lycopersicum; Lady beetle; Plant resistance; Trichomes; Tritrophic interaction.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000500003
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Biosíntesis de lignina y comportamiento productivo en tres pastos de clima templado. Colegio de Postgraduados
Vargas Romero, Juan Manuel.
Tres especies de gramíneas de clima templado, el híbrido Festulolium y sus progenitores Festuca arundinacea y Lolium perenne, se evaluaron en invernadero para determinar el crecimiento, fracciones de la fibra y características anatómicas de cada especie. Además se extrajo el ADN de las tres gramíneas para realizar un análisis molecular y calcular correlaciones entre los marcadores y las variables analizadas. De acuerdo con los resultados, el Festulolium fue distinto a F. arundinacea y L. perenne en el número de láminas por tallo; respecto a la abundancia relativa de lignina, área de xilema y floema, el contenido fue similar entre Festulolium y L. perenne, mientras que los valores de densidad de tricomas en el haz fueron semejantes entre Festulolium y F....
Palavras-chave: Paredes celulares; FDN; FDA; Estomas; Tricomas; Microscopía electrónica; Festulolium; Cell walls; NDF; FDN; Trichomes; Electron microscopy; Ganadería; Doctorado; Festuca arundinacea; Lolium perenne.
Ano: 2012 URL: http://hdl.handle.net/10521/744
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Comparative leaf anatomy of Baccharis (Asteraceae) from high-altitude grasslands in Brazil: taxonomic and ecological implications. Repositório Alice
OLIVEIRA, T. O. C.; HEIDEN, G.; LUNA, B. N.; BARROS, C. F..
bitstream/item/205842/1/Gustavo-Heiden-Botany-v.-97-p.-615-626..pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Campos de altitude; Secretory ducts; Trichomes.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115531
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Desenvolvimento, sobrevivência e reprodução da Cochonilha phenacoccus solenopsis (Hemiptera: pseudococcidae) em algodoeiros com alta e baixa pilosidade. Repositório Alice
GUEDES, V. da S.; TOMÉ, M. P.; SOUSA, M. M. de; GALVÃO FILHO, A. L. de A.; VASCONCELOS, E. D.; SILVA, C. A. D. da.
Algodoeiros com densos tricomas podem reduzir ou aumentar a injúria e a abundância dos insetos fitófagos dependendo das características morfológicas desses tricomas e da espécie de inseto fitófago envolvido nessa interação. A cochonilha P. solenopsis é uma espécie invasora, bissexual, com múltiplas gerações por ano e responsável por perdas consideráveis a produção do algodoeiro em diversos países do mundo, incluindo o Brasil. O objetivo desta pesquisa foi comparar o desenvolvimento, a sobrevivência e a reprodução da cochonilha, Phenacoccus solenopsis (Hemiptera: Pseudococcidae) em algodoeiros com alta e baixa pilosidade.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Densidade de tricomas; Algodão; Cochonilha; Cotton; Trichomes.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1083586
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Essential oil from Chenopodium ambrosioides L.: secretory structures, antibacterial and antioxidant activities Biological Sciences
Santiago, Juliana Andrade; Cardoso, Maria das Graças; Batista, Luís Roberto; Castro, Evaristo Mauro de; Teixeira, Maria Luisa; Pires, Marinês Ferreira.
The aim of this study was to evaluate the antibacterial and antioxidant activities of essential oil from Chenopodium ambrosioides L. and to determine its secretory structures. The essential oil was extracted through the hydrodistillation technique using a modified Clevenger apparatus (2 hours) and chemically characterized by GC/MS and GC-FID. The antioxidant activity was determined by monitoring the reduction of 2,2-diphenyl-1-picrylhydrazyl (DPPH) and by the oxidation of the β-carotene/linoleic acid system. The evaluation of antibacterial activity was performed by the agar cavity diffusion technique using the microorganisms Staphylococcus aureus, Listeria monocytogenes, Escherichia coli and Salmonella Cholerasuis. The characterization of trichomes was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Natural products; Antioxidant assays; Antimicrobial; Trichomes.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28303
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Estádio de desenvolvimento e superfície foliar reduzem a eficiência de Chlorimuron-ethyl e Glyphosate em Conyza sumatrensis. Repositório Alice
SANTOS, F. M.; VARGAS, L.; CHRISTOFFOLETI, P. J.; AGOSTINETTO, D.; MARTIN, T. N.; RUCHEL, Q.; FERNANDO, J. A..
Nos Estados do Rio Grande do Sul e do Paraná, há frequentes relatos de falhas decontrole de Conyza sumatrensis com chlorimuron-ethyl em lavouras de soja. Caracteriza morfologicamente as folhas de Conyza sumatrensis e avalia o controle com herbicidas aplicados em biótipos dessa planta daninha em três estádios de desenvolvimento. Foram realizados dois estudos, com experimentos em casa de vegetação, em delineamento inteiramente casualizado com quatro repetições. No primeiro estudo, os biótipos de buva foram coletados e identificados; já no segundo estudo avaliou-se a resposta de biótipos aos herbicidas, doses e estádios de desenvolvimento. As doses de herbicidas foram: 0,0; 6,25; 12,5; 25; 50; 100; 200; e 400, representadas em porcentagem da dose de registro...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Planta daninha; Buva; ALS; EPSPs; Tricomas; Estômatos; Horseweed; Weed; Trichomes; Stomata.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1005063
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Factors affecting the attack rate of Bemisia tabaci on cucumber. Repositório Alice
LEITE, G.L.D.; PICANÇO, M.; GUEDES, R.N.C.; ECOLE, C.C..
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: Artigo em periódico indexado (ALICE) Palavras-chave: Cucumis sativus; Whitefly; Allelochemicals; Nitrogen; Trichomes; Mosca-branca; Aleloquímicos; Nitrogênio; Tricomas.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/handle/doc/119176
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Factors affecting the attack rate of Bemisia tabaci on cucumber PAB
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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Hosting Capacity of Horticultural Plants for Insect Pests in Brazil Chilean J. Agric. Res.
Leite,Germano L.D; Picanço,Marcelo; Zanuncio,José C; Moreira,Márcio D; Jham,Gulab N.
Factors such as fertilization, allelochemicals, trichomes, weather, and natural enemies can influence pest populations. Thus, it is necessary to understand the factors that predispose vegetable species to pests and the role of polyculture, crop rotation, and neighboring plants. The objective of this research was to study the hosting capacity for pests of Abelmoschus esculentus (L.), Brassica oleracea L. vars. acephala and capitata, Capsicum annuum L., Cucurbita moschata (Duchesne), Cucurbita maxima Duchesne and Cucumis sativus L., Lycopersicon esculentum Mill., Solanum gilo Raddi and Solanum melongena L., and Phaseolus vulgaris L. The higher density of Bemisia tabaci (Genn.) adults on C. sativus can be due to the higher amount of pentacosane and octacosane...
Tipo: Journal article Palavras-chave: Trichomes; Allelochemicals; Nitrogen; Potassium; Insects.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000300006
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Influence of environment on the leaf morpho-anatomy and histochemical of the ayahuasca leaf: Populations cultivated in extra-Amazonian regions Biological Sciences
Miranda, Ordilena Ferreira de; de Souza, Saulo Eduardo Xavier Franco; Milan, Rodrigo José; Bueno, Aline Borges; Almeida, Marcilio de.
Psychotria viridis Ruiz & Pav. (Rubiaceae) occurs naturally throughout the Amazon and it is traditionally used by indigenous communities, being incorporated into religious use in urban contexts over the last few decades. It is known and cultivated in many regions of South America for possessing valuable bioactive alkaloids. In this paper, we described P. viridis leaf morphology, anatomy and histochemistry from three populations cultivated in the southeastern Brazil, in order to identify possible adaptations to local environment and management. All plants presented terminal stipules and basic morpho-anatomical patterns of leaves, consistent with most species of the genus, as heterogeneous dorsiventral mesophyll, uniseriate epidermis, presents large...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Characterization; Alkaloid; Trichomes; Glandular duct; Domatia. characterization; Alkaloid; Trichomes; Secretory duct; Domatia..
Ano: 2020 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/50369
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Leaf Surface Scanning Electron Microscopy of 16 Mulberry Genotypes (Morus spp.) with Respect to their Feeding Value in Silkworm (Bombyx mori L.) Rearing Chilean J. Agric. Res.
Singhal,B.K; Baqual,M.F; Khan,M.A; Bindroo,B.B; Dhar,A.
Mulberry (Morus spp.) is the only silkworm (Bombyx mori L.) food plant. In Indian sub tropics, S-146 is the only popular and ruling mulberry genotype for silkworm rearing. As a result, mulberry leaf availability is always the limiting factor, and therefore, sub tropics are contributing less than 1% of the country’s total silk production compared with more than 60% under tropical conditions. Besides climatic conditions, this is due to a very limited number of mulberry genotypes available in this region for silkworm rearing. However, in the mean time, 15 mulberry genotypes viz. ‘Tr-10’,‘Chinese White’,‘K-2’,‘Sujanpur...
Tipo: Journal article Palavras-chave: Scanning electron microscopy; Stomata; Trichomes; Idioblasts; Leaf yield; Sericulture.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200001
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Leaf surfaces of Gomphrena spp. (Amaranthaceae) from Cerrado biome Biocell
Carvalho,Suzane Margaret Fank-de-; Gomes,Misléia Rodrigues de Aguiar; Silva,Pedro Ítalo Tanno; Báo,Sônia Nair.
The leaf structure and micromorphology characterize plant species and reflex its interactions with the environment. Leaf epidermis sculptures aid high transpiration plants on light reflection. The form and distribution of epicuticular wax crystalloids are important to characterize the surface. Aiming to know the micromorphology and the ultrastructure of G. arborescens, G. pohlii and G. virgata, leaves of these Cerrado native species were collected in Brasília, Distrito Federal, Brazil, at the Olympic Center of the Universidade de Brasília and at Reserva Ecológica do Roncador. Leaves of G. globosa, an Indian native species, were also studied for comparison. Leaves were fractionated, fixed and treated for observation under optical and scanning electron...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anatomy; Epicuticular wax; Platelets; Trichomes; Stomata.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452010000100004
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No-choice ovipositional nonpreference of Bemisia tabaci (Gennadius) B biotype on tomato genotypes Scientia Agricola
Oriani,Maria Auxiliadora de Godoy; Vendramim,José Djair; Vasconcelos,Cristina Jensen.
Brazil is one of the main tomato producers worldwide. Nevertheless, 40 to 70% of the production is lost due to Bemisia tabaci (Gennadius) B biotype attacks. Resistant plant germplasm can be an important method for controlling this pest in an integrated pest management program. This research aimed to evaluate the no-choice ovipositional preference of B. tabaci B biotype on 18 tomato genotypes with different densities and types of trichomes testing two screening techniques and to determine the influence of trichomes on whitefly ovipositional preference. Two methods of confinement experiments were used. Leaflets detached from the upper third part of the tomato plants (first experiment) and 30-day-old plants (second experiment) were infested with whiteflies...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum lycopersicum; Plant resistance; Whitefly; Antixenosis; Trichomes.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200003
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