Consulta: subjectFacets:"Defoliation"
Registros recuperados: 18
Data/hora: 09/06/2024 07:49:33

Dinámica de crecimiento de cultivares de Urochloa brizantha Kunth. y Megathyrsus maximus (Simon &amp; Jacobs), a diferente frecuencia de corte.
Provedor de dados: 32
Autores: Joaquín Cancino, Santiago.
El objetivo del estudio fue determinar la producción estacional y anual de forraje, composición morfológica, características estructurales y dinámica de ahijamiento de praderas de pasto Insurgente, Toledo, Tanzania y Mombaza, cosechados a tres frecuencias de corte (FC; 4, 5 y 6 semanas), durante las épocas de nortes, sequía y lluvias. Se utilizó un diseño de bloques completos al zar, con cuatro repeticiones y arreglo de tratamientos en parcelas divididas, donde la parcela mayor fueron los cultivares y la menor las frecuencias de corte. Los cultivares se sembraron a distancia de 50 x 50 cm entre plantas y surcos, respectivamente. El tamaño de parcelas fue de 10 m2. El área de muestreo fueron los dos surcos centrales, los cuales se dividieron en 3...
Palavras-chave: Pastos tropicales; Defoliación; Acumulación de forraje; Ahijamiento; Tropical grasses; Defoliation; Herbage accumulation; Tillering; Ganadería; Doctorado.
Ano: 2014
URL: http://hdl.handle.net/10521/2349

Efecto de la micorrización y defoliación en la tasa de crecimiento de cedro rojo (Cedrela odorata L.) y diagnóstico de plantaciones
Provedor de dados: 32
Autores: Oros Ortega, Iván.
En plántulas de C. odorata cultivadas en vivero se evaluó el efecto de seis tratamientos (TS) en la tasa de crecimiento en altura (TCA), diámetro (TCD) y tasa de crecimiento relativo (TCR), peso fresco y seco de las plántulas. Se utilizó un diseño completamente al azar con un arreglo factorial (2 x 3), los TS consistieron de una combinación de los factores: porcentaje de defoliación (0, 50 y 90) e inoculación con Glomus intraradices (con y sin inoculación). Además, se diagnosticó el estado actual de plantaciones de cedro en la zona de influencia del Campus Veracruz a través de una apreciación rural rápida. A los seis meses del experimento plantas de TS con inoculación, independientemente del nivel de defoliación, presentaron mayor TCD (F= 100.45,...
Tipo: Tesis
Palavras-chave: Cedrela odorata; Micorriza arbuscular; Glomus intraradices; Defoliación; Maestría; Agroecosistemas Tropicales; Arbuscular mycorrhiza; Defoliation.
Ano: 2009
URL: http://hdl.handle.net/10521/1590

Dinámica de microorganismos rizosféricos y filosféricos de Annona diversifolia Saff. Como respuesta a la estacionalidad, fenología y defoliación en el trópico seco
Provedor de dados: 32
Autores: Cortés Sarabia, Jazmín.
La ilama es una planta frutícola tropical, cuya distribución se encuentra restringida a México,  Centroamérica y parte de Sudamérica y cuyo cultivo es de importancia local. Dado el escaso  conocimiento sobre la dinámica microbiana en este tipo de cultivo, este estudio tuvo como  objetivo evaluar el efecto de la estacionalidad, fenología y defoliación sobre la dinámica  poblacional microbiana en filósfera y rizosfera de plantas de ilama (Annona diversifolia Saff.),  en campo e invernadero. Se evaluaron plantas de tres edades en cuatro épocas del año en San  Antonio de las Huertas, Guerrero. Se evaluaron las unidades formadoras de colonias (UFC) de  hongos, actinomicetos, bacterias totales así como bacterias fijadoras de nitrógeno pertenecientes  a los...
Tipo: Tesis
Palavras-chave: Bacterias fijadoras de nitrógeno; Bacterias solubilizadoras de fosfatos; Fenología; Estacionalidad; Defoliación; Micorriza arbuscular; Maestría; Edafología; Nitrogen-fixing bacteria; Solubilizing phosphate bacteria; Phenology; Seasonality; Defoliation; Arbuscular mycorrhizae.
Ano: 2008
URL: http://hdl.handle.net/10521/1267

Diversidad de hongos micorrízicos arbusculares y su interacción con factores ambientales y fisiológicos en la producción de plántulas de caoba (Swietenia macrophylla King.)
Provedor de dados: 32
Autores: Rodríguez Morelos, Víctor Hugo.
Aunque se conoce la importancia de las asociaciones micorrízicas, en las regiones tropicales, los estudios sobre la diversidad y funcionamiento de los hongos micorrízicos arbusculares (HMA) son escasos, especialmente en meliáceas nativas del neotrópico como la caoba (Swietenia macrophylla King) la cual es la especie maderable de mayor valor económico en Latinoamérica. En vivero, las prácticas de manejo pueden afectar la calidad de las plantas producidas para actividades de reforestación. Bajo este contexto, en este estudio se identificó la situación actual de los sistemas de producción de plántulas de caoba en viveros oficiales en el estado de Veracruz. También se identificaron las especies de HMA asociadas a la rizósfera de plántulas y árboles maduros de...
Palavras-chave: Micorrización; Árboles tropicales; Meliáceas; Inóculo micorrízico; Defoliación; Micorrhizal; Tropical tress; Meliaceae; Micorrizhal inoculums; Defoliation; Maestría; Agroecosistemas tropicales.
Ano: 2010
URL: http://hdl.handle.net/10521/463

MORPHOGENIC AND STRUCTURAL CHARACTERISTICS OF MARANDU GRASS AFFECTED BY FERTIGATION WITH TREATED SEWAGE EFFLUENT AND CUTTING HEIGHT
Provedor de dados: 70
Autores: Dantas,Geffson de F.; Faria,Rogério T. de; Costa,Natã R.; Santos,Gilmar O.; Ferraudo,Antonio S.
ABSTRACT The response of biomass flow components of forage from the interaction between fertigation with wastewater and cutting height during the year is little known. The objective of this work was to verify the responses of morphogenic and structural characteristics of Urochloa brizantha as a function of fertigation application strategies with sewage treatment plant effluent (TSE), complemented with urea (U), associated with harvest with two plant heights during the dry and rainy periods. The forage cutting heights were 30 cm (H1) and 40 cm (H2), and nitrogen fertilization doses were 9.1 (D1), 12.1 (D2), 22.5 (D3), 26.6 (D4), and 34.0 (D5) kg of N per Mg−1 of dry matter (DM) produced, applied by TSE via fertigation, plus 7.5 kg N per Mg−1 of DM produced,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Defoliation; Nitrogen; Water reuse.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000600692

Basal defoliation and their influence in agronomic and phytopathological traits in tomato plants
Provedor de dados: 75
Autores: Silva,Laércio J da; Milagres,Carla do C; Silva,Derly José H da; Nick,Carlos; Castro,João Paulo A de.
The incidence of leaf diseases is one of the main factors limiting the tomato crop production, increasing the production cost due to excessive pesticide application. The basal leaf removal could reduce inoculum sources, disease severity and contribute to reducing the use of pesticide. Aiming to evaluate the efficiency of this practice on the reduction of tomato leaf diseases and the effect in the quality and in the productivity of the tomato plants for in natura consumption, two experiments were carried out to test four levels of basal leaf removal. Basal leaves removal, at fruit harvesting, is efficient in reducing the infected plant area by disease, what can mean smaller disease severity and least inoculum source in the field. Also, the all basal leaf...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lycopersicon esculentum; Defoliation; Plant disease; Cultural management.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000300020

Uso de desfolhantes no manejo da indução da brotação em pinheira.
Provedor de dados: 14
Autores: HAWERROTH, F. J.; MARTINS, M. V. V.; AZEVEDO, A. E. C.
bitstream/item/103335/1/BPD13013.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Pinheira; Escalonamento de produção; Production scheduling.; Annona Squamosa; Desfolha; Fenologia.; Defoliation; Phenology.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/982441

Níveis de desfolha tolerados na cultura da soja sem a ocorrência de prejuízos à produtividade.
Provedor de dados: 14
Autores: BUENO, A. de F.; BATISTELA, M. J.; MOSCARDI, F.; BUENO, R. C. O. de F.; NISHIKAWA, M.; HIDALGO, G.; SILVA, L.; GARCIA, A.; CORBO, E.; SILVA, R. B.
Nível de ação e o MIP-Soja. Ensaios com injúria na fase inicial da lavoura: Londrina, PR ? Safras 2001/2002 e 2002/2003. Ensaios com diferentes níveis de desfolha em diferentes fases do desenvolvimento: Não-Me-Toque-RS e Sorriso-MT ? Safra 2008/2009. Ensaios com diferentes níveis de desfolha contínua durante diferentes fases do desenvolvimento: Morrinhos, GO ? Safra 2009/2010. Resultados obtidos que comprovam a segurança dos níveis de ação recomendados. Considerações finais.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Soja; Desfolha; Soybeans; Defoliation.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/859415

Efeito de inseticidas aplicados nas sementes de soja sobre a mortalidade e consumo foliar de lagartas desfolhadoras.
Provedor de dados: 14
Autores: VIEIRA, E. C. de S.; VIEIRA, M. C. de S.; SILVA, P. G.; AVILA, C. J.; VIVAN, L. M.
bitstream/item/189928/1/ORAL10.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Chrysodeixis includens; Lepdoptera; Inseticida; Semente; Lagarta; Controle Químico; Desfolha; Anticarsia Gemmatalis; Soybeans; Insecticides; Chemical control; Defoliation; Entomology.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1103242

New host-plant records for the defoliator Ormiscodes amphimone (Fabricius) (Lepidoptera: Saturniidae)
Provedor de dados: 82
Autores: Paritsis,Juan; Elgueta,Mario; Quintero,Carolina; Veblen,Thomas T.
Ormiscodes amphimone (Fabricius) is a phytophagous moth species known to severely defoliate woody species in Chile and Argentina. Here we document new records of O. amphimonehost associations emphasizing the role of Nothofagus pumilio as its primary host in our study area. This new record for Argentina is highly significant given the economic importance of N. pumilio as a timber resource and the potential of O. amphimone to generate extensive outbreaks.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Defoliation; Hemileucinae; Herbivory; Insect outbreak; Nothofagus pumilio; Patagonia.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000600032

Primeiro relato de Sphacelodes vulneraria (Lepidoptera: Geometridae) danificando Hovenia dulcis no Brazil
Provedor de dados: 190
Autores: Prado Ribeiro, Leandro; Corrêa, Camila; Vargas Castilhos, Rodolfo.
Hovenia dulcis Thunb. (Rhamnaceae), conhecida popularmente como uva-do-japão, é comumente utilizada para sombreamento de aviários e chiqueiros no Sul do Brasil. É relatada pela primeira vez no Brasil a ocorrência de Sphacelodes vulneraria (Hübner, 1823) (Lepidoptera: Geometridae: Ennominae) danificando árvores de H. dulcis, e o seu potencial como nova praga desta espécie florestal.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Uva- do-japão; Desfolha; Pragas florestais Entomology Japanese raisin tree; Defoliation; Forest pests.
Ano: 2017
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1209

Axillary bud viability and dry matter production of Poa ligularis in Patagonian grasslands: (with 1 table &amp;#38; 4 figures)
Provedor de dados: 85
Autores: Souto,CP; Becker,GF; Siffredi,GL; Busso,CA; Sternberg,M.
Poa ligularis Nees is one of the dominant perennial grass species in Patagonian grasslands. This is the first field study which investigated the effects of defoliation frequency on its number of viable axillary buds, and subsequent dry matter production during one growing season. Experiments were arranged in a randomized complete block design. Treatments included one defoliation height (10 cm), from one to five times a year, and undefoliated controls. Bud respiratory activity was examined usingthe tetrazolium test and the vital stain Evan's blue. At the end of the growing season, plants that have been defoliated more than three times showed significatively (p&lt;0.05) lower number of respiratory active buds than unclipped controls. A high defoliation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Defoliation; Poa ligularis; Axillary buds; Semiarid Argentina; Dry matter production; Patagonia.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100004

Onion yield as affected by plant density, nitrogen level and loss of leaf area
Provedor de dados: 85
Autores: Siliquini,OA; Orioli,GA; Lobartini,JC.
Onion (Allium cepa) is an important horticulture crop because of its value as a food with a long shelf life being a relatively non-perishable product. It is very helpful to understand the growth response of the seeded onion crop to conduct appropriate field practices in attaining the highest or optimum yields. A three year field experiment was conducted using a variety of onion Valcatorce INTA, in a randomized block design with five replicates. Treatments were two plant densities and three rates of N application. The bulb growth followed a classical sigmoid curve. During the rapid growing period, the crop had the greatest leaf area (LA) with at least six leaves per plant. Increasing plant density increased yield in kg/ha, but decreased bulb size....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Defoliation; Bulb production; Onion fertilization.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000200011

ETHEPHON SPRAYS AS A DEFOLIANT IN ‘NIAGARA ROSADA’ VINE SUBJECTED TO TWO CROP PRODUCTION PER YEAR
Provedor de dados: 94
Autores: COSTA,THIAGO VIEIRA DA; FAÇANHA,RAFAELA VIEIRA; SCARPARE FILHO,JOÃO ALEXIO.
ABSTRACT  In climate region Cwa of the State of São Paulo the technique of double cropping the grapevine is possible, however, when it is time for the second pruning of the crop, most of the vine’s leaves are still in the plant, posing the problem that the use of ethephon as a defoliant could increase leaf senescence and improve the vine management. The objective of this study was to evaluate the effects of ethephon spray as a defoliant in the development and production of the ‘Niagara Rosada’ vine when subjected to double cropping, and the influence this bioactivator may have on carbohydrate reserves in the branch. The experiments were conducted in a commercial, non-irrigated area in agricultural years of 2011/2012 and 2012/2013. The length, diameter and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis labrusca L.; Pruning; Defoliation; Carbohydrate reserves.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000200201

Feeding preferences of the willow sawfl y Nematus oligospilus (Hymenoptera: Tenthredinidae) for commercial Salix clones
Provedor de dados: 99
Autores: Loetti,Verónica; Rubio,Alejandra; Bellocq,María Isabel.
Nematus oligospilus Förster (Hymenoptera: Tenthredinidae) is a willow sawfly native to the Northern Hemisphere which became a serious defoliator in willow plantations (Salix spp.) of the Southern Hemisphere after being introduced in the early 1980´s. Studies on host preferences provide useful information for the development of pest management strategies where the willow sawfly may produce tree damage and economic loss. Feeding preferences of N. oligospilus larvae were evaluated in laboratory trials by simultaneously offering leaves from four willow tree clones commonly used in commercial plantations in Argentina (Salix babylonica var sacramenta Hortus, Salix nigra Marsch., S. babylonica L. x Salix alba L. 131-27 and Salix matsudana Koidz. x S. alba L....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Defoliation; Herbivory; Salicaceae; Willow sawfly.
Ano: 2012
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802012000100014

Tiller emission and dry mass accumulation of wheat cultivars under stress
Provedor de dados: 63
Autores: Almeida,Milton Luiz de; Sangoi,Luís; Merotto Jr.,Aldo; Alves,Antônio Carlos; Nava,Itamar Cristiano; Knopp,Armando Cristiano.
Tillers are important structures for wheat (Triticum aestivum L.) because they contribute to increase the number of spikes per area, enhancing grain yield. Stresses during plants early growth have a sizable effect on tiller production. Three experiments were conducted to evaluate the effects of stresses induced by unevenness in sowing depth, defoliation and differences in soil pH on tiller emission and dry mass accumulation of wheat cultivars. The experiments were carried out in Lages, Southern Brazil, during the winter growing seasons of 2000 and 2001. They were performed in square boxes, under natural conditions of radiation and irrigation. In the first experiment, five types of sowing depths were tested to simulate different systems of unevenness in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum L.; Tillering; Sowing depth; Defoliation; Aluminum.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000300004

Quantitative analysis of two important epidemiological features of the common bean: Phaeoisariopsis griseola pathosystem
Provedor de dados: 102
Autores: Willocquet,Laetitia; Allorent,Delphine; Savary,Serge.
This work quantifies two important epidemiological features of the bean (Phaseolus vulgaris)/Phaeoisariopsis griseola pathosystem. The first is the effect of the number of nights of leaf wetness on infection efficiency. Infection efficiency was below 10% when inoculated leaflets were exposed to less than two nights of leaf wetness. Optimum infection efficiencies were obtained after three to four nights of leaf wetness, at about 50%. Further nights of leaf wetness did not increase the infection efficiency. The second feature quantified is the relative rate of leaflet defoliation for varying levels of angular leaf spot severity. It increased with disease severity according to a logarithm-like curve, and a relative rate of 0.23 day-1 was estimated for a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Epidemiology; Angular leaf spot; Phaseolus vulgaris; Infection efficiency; Defoliation; Leaf wetness; Monocycle process.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582004000600015

Role of nonproductive tillers as transient sinks of assimilates in wheat
Provedor de dados: 53
Autores: Fioreze,Samuel Luiz; Michelon,Luiz Henrique; Turek,Thaís Lemos; Drun,Robson Pelissari; Dalorsaleta,Julio César Sbardella.
ABSTRACT Although source–sink relationships in wheat are well studied, the performance of tillers as transient sinks is still unclear, especially under stress conditions. Thus, this work aimed to study the yield relationships of wheat stems in contrasting genotypes as affected by tiller treatment under stress conditions. Two experiments were conducted under greenhouse conditions using BRS Guamirim (high tillering) and BRS Parrudo (low tillering) wheat cultivars. Four tillering treatments were applied on late tillers in the first growing season (2016) and three in the second (2017): (i) free-tillering, (ii) detillering, (iii) physical suppression (only in the first season) and (iv) “spikes removal”. The main stem and the first four emitted tillers were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Source–sink relationship; Tillering; Drought stress; Defoliation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020005004203