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| Registros recuperados: 55 | |
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| Flechtmann,Carlos A.H.; Ottati,Angelo L.T.. |
| We report for the first time the attack of the walking stick Tetanorhynchus leonardosi (Mello-Leitão) (Orthoptera: Proscopiidae) on young eucalyptus, Eucalyptus urophylla, in Brazil. The upper third of the trees was attacked (apical meristems and new leaves). During the hottest hours of the day the insects were found sheltered between leaves on the median third of the plants, and feeding when temperatures were milder. The attack was heterogeneous in the stand, being more concentrated when it was neighbouring an area of native 'Cerrado' vegetation. Mean defoliation was 5.8%, with an average of 5.2% of plants with apical meristems cut by the walking sticks. An application of Methyl Parathion was not effective against the pest. Apparently plants older than 6... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Damage; Dispersion; Walking stick. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591997000300027 |
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| LORDELLO,RUBENS RODOLFO ALBUQUERQUE; LORDELLO,ANA INES LUCENA; GODOY,IGNÁCIO JOSÉ DE. |
| The root-knot nematode Meloidogyne javanica (Treub, 1885) Chitwood, 1949, was identified in roots, nodules and shells of peanut plants (Arachis hypogaea L.), cv. Florman-INTA, collected from a field in Menno colony, Chaco Central region of Paraguay. Infected plants were observed in patches, showing wilting and drying of vegetative parts. Peanut had been grown ininterruptly for many years in the same area and patches had already been observed in the preceding year in cv. Starr. Nematodes collected from roots in this field reproduced on tomato cultivar rutgers and peanut cultivar florunner and produced egg-masses on roots, nodules and shells of cultivar Florman. This is the first report on M. javanica parasiting peanut in Paraguay. |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Root-knot nematode; Meloidogyne javanica; Peanut; Arachis hypogaea; Occurrence; Damage; Host; Nodules; Shells; Meloidogyne javanica; Arachis hypogaea. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051997000100009 |
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| Figueroa-Brito,Rodolfo; Villa-Ayala,Patricia; López-Olguín,Jesús F; Huerta-de la Peña,Arturo; Pacheco-Aguilar,Juan R; Ramos-López,Miguel A. |
| R. Figueroa-Brito, P. Villa-Ayala, J.F. López-Olguín, A. Huerta-de la Pena, J.R. Pacheco-Aguilar, and M.A. Ramos-López. 2013. Nitrogen fertilization sources and insecticidal activity of aqueous seeds extract of Carica papaya against Spodoptera frugiperda in maize. Cien. Inv. Agr. 40(3): 567-577. The damage caused by the fall armyworm Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) to vegetative-stage maize cultivated with chemical nitrogen fertilizers, vermicompost, and Carica papaya L. (Caricaceae) seed extract was estimated. Each shoot was infested with one first instar larva of S. frugiperda. The variables measured included the percentage of germination, length of the second and fifth leaves, stem diameter and plant height, and the estimation of... |
| Tipo: Journal article |
Palavras-chave: Aqueous extract; Caricaceae; Chemical fertilizers; Damage; Fall armyworm; Spodoptera frugiperda. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300009 |
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| Duchini,Paulo Gonçalves; Echeverria,Joilson Roda; Américo,Luana Fidelis; Guzatti,Gabriela Cristina; Cherman,Mariana Alejandra; Sbrissia,André Fischer. |
| ABSTRACT: Cyclocephala flavipennis Arrow, 1914 (Coleoptera: Melolonthidae), popularly known as white grub, is an insect widely disseminated in the South Region of Brazil. Despite the frequent occurrence of this white grub in areas cultivated with winter cereals, it is generally not considered a pest, since it feeds on straw and dead plant material. However, in 2015 and 2016, this insect has been identified as the damage-causing agent in the perennial winter pastures in Lages, Santa Catarina, Brazil. Damage was observed in patches and caused reduction in root depth and mass, resulting in loss of vigor, accelerated senescence in aerial parts, and death of tillers in Festuca arundinacea Schreb. and Dactylis glomerata L. plants. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Damage; Dynastinae; Grass; Pest; Santa Catarina. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500153 |
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| Bordin,Luiz Carlos; Casa,Ricardo Trezi; Marcuzzo,Leandro Luiz; Reis,Erlei Melo; Gheller,André; Zancan,Rômulo Luís; Fingstag,Maiquiel Diego. |
| ABSTRACT: The occurrence of leaf spots in irrigated rice can reduce the yield and compromise the quality of the grain. However it is unknown the economic damage threshold (EDT) that these spots cause the yield of crop. The objective of this study was to obtain damage functions for models of critical, to relate damage by simultaneous occurrence of blast, brown spot and scald spot with grain yield harvests in 2011/12 and 2012/2013, in Rio do Oeste, Santa Catarina State, Brazil. Gradient of diseases intensity was generated by number of applications and fungicides rates. Design was a randomized block with four replications and six treatments consisting of mixing fungicide applications of triazole (difenoconazole) and strobilurin (azoxystrobin). In 2011/12 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Pyricularia oryzae; Bipolaris oryzae; Gerlachia oryzae; Damage. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000100007 |
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| Alcántara Jiménez, José Angel. |
| Polyphagotarsonemus latus es una especie cosmopolita que afecta diferentes cultivos tanto en áreas templadas como tropicales. El principal daño ocasionado por esta especie es la reducción o deformación de hojas jóvenes, brotes, frutos y flores. En papayo, el daño en hojas causado por este ácaro es conocido como "mano de chango" porque el área foliar de las hojas de papayo se reduce casi hasta las nervaduras, simulando los dedos de un mono. Este daño es similar al causado por Papaya Ringspot Virus (PRSV-P). Debido a que P. latus y PRSV-P causan daños similares a las hojas de papayo, el objetivo general de esta investigación fue estudiar la relación que existe entre el ácaro P. latus y PRSV-P en la reducción foliar de Carica papaya cv Maradol roja. Tres... |
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Palavras-chave: Papayo; Area foliar; Síntomas; Relación ácaro-virus; Leaf area; Damage; Virus-mite relationship; Doctorado; Fruticultlura. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/238 |
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| Alcántara Jiménez, José Ángel. |
| Polyphagotarsonemus latus es una especie cosmopolita que afecta diferentes cultivos tanto en áreas templadas como tropicales. El principal daño ocasionado por esta especie es la reducción o deformación de hojas jóvenes, brotes, frutos y flores. En papayo, el daño en hojas causado por este ácaro es conocido como "mano de chango" porque el área foliar de las hojas de papayo se reduce casi hasta las nervaduras, simulando los dedos de un mono. Este daño es similar al causado por Papaya Ringspot Virus (PRSV-P). Debido a que P. latus y PRSV-P causan daños similares a las hojas de papayo, el objetivo general de esta investigación fue estudiar la relación que existe entre el ácaro P. latus y PRSV-P en la reducción foliar de Carica papaya cv Maradol roja. Tres... |
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Palavras-chave: Papayo; Area foliar; Síntomas; Relación ácaro-virus; Leaf area; Damage; Virus-mite relationship; Doctorado; Fruticultlura. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/238 |
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| Ramírez Delgadillo, Juan José. |
| La pitahaya es una cactácea que se cultiva en zonas con clima tropical, subtropical o semiárido de México. Tres especies tienen importancia económica como frutales. En Tepoztlán, Morelos, se encontraron plantas con síntomas causados por patógenos y daño por insectos. Debido a la importancia actual y potencial del cultivo y la incidencia de plagas y patógenos, se realizó el presente estudio con el objetivo de identificar taxonómicamente y describir daños de los principales agentes fitosanitarios asociados Hylocereus spp. Durante 2006-2008 se recolectaron mensualmente estructuras vegetativas y reproductoras dañadas; de 2007-2010 se aislaron e identificaron microorganismos (22± 1.5°C) e insectos (25 ± 1.5°C, 45 % HR y fotoperiodo 14:10) en laboratorio. En... |
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Palavras-chave: Plagas; Fitopatógenos; Taxonomía; Daños; Insectos; Hongos; Pitahaya; Pests; Phytopathogens; Taxonomy; Damage; Insects; Fungus; Doctorado; Fitopatología. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/356 |
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| Duncker, Philipp; Albert-Ludwigs-University Freiburg, Institute for Forest Growth;; Gardiner, Barry; Forest Research, Northern Research Station;; Grodzki, Wojciech; Forest Research Institute, Department of Forest Management in Mountain Regions;; Langstrom, Bo; The Swedish University of Agricultural Sciences, Department of Ecology;; Netherer, Sigrid; University of Natural Resources and Life Sciences, Department of Forest and Soil Sciences, Institute of Forest Entomology, Forest Pathology, and Forest Protection;; Nicoll, Bruce; Forest Research, Northern Research Station;; Orazio, Christophe; IEFC - EFI Atlantic;; Schelhaas, Mart-Jan; Centre for Ecosystem Studies, Alterra;; Tojic, Karl; Albert-Ludwigs-University Freiburg, Institute for Forest Growth;. |
| Due to climate change, forests are likely to face new hazards, which may require adaptation of our existing silvicultural practices. However, it is difficult to imagine a forest management approach that can simultaneously minimize all risks of damage. Multicriteria decision analysis (MCDA) has been developed to help decision makers choose between actions that require reaching a compromise among criteria of different weights. We adapted this method and produced a multicriteria risk analysis (MCRA) to compare the risk of damage associated with various forest management systems with a range of management intensity. The objective was to evaluate the effect of four forest management alternatives (FMAs) (i.e., close to nature, extensive management with combined... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Abiotic; Biotic; Damage; Hazard; MCRA; Silviculture. |
| Ano: 2012 |
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| Silva,Diego MN; Oliveira,Fábio L; Dalvi,Leandro P; Pratissoli,Dirceu; Erlacher,Wellington A; Quaresma,Mateus AL. |
| This research aimed to catalog insects that cause injury to the yacon (Smallanthus sonchifolius, família Asteraceae) crop, in order to identify those who may cause damage. The study was carried out in Alegre, Espírito Santo State, Brazil. Cultivation began in May 2013 and the harvest was done 180 days later. Three species from the Coleoptera order: Lagria villosa (Coleoptera: Lagriidae); Cerotoma arcuata and Diabrotica speciosa (Coleoptera: Chrysomelidae) and two species from the Lepidoptera order: Spodoptera eridania (Lepidoptera: Noctuidae) and Chlosyne lacinia saundersii (Lepidoptera: Nymphalidae) were observed causing damage to the yacon crop. The caterpillar C. lacinia saundersii, known as sunflower caterpillar, was the most important species, being... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Smallanthus sonchifolius; Damage; Pest management. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362015000300394 |
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| PENTEADO, S. do R. C.; OLIVEIRA, E. B. de; IEDE, E. T.. |
| Devido à grande ameaça que Sirex noctilio (vespa da madeira) representa para o setor florestal brasileiro, é de fundamental importância o monitoramento da praga. Para isto, torna-se necessária a definição de uma técnica de amostragem de danos, que leve em conta a grande extensão dos povoamentos de pinus, os de ataque da praga, a praticiade de aplicação de método e os custos da atividade. Neste trabalho foi desenvolvido um método de amostragem, no qual a amostra não tem tamanho fixo, sendo dimensionada à medida em que a amostragem vai sendo realizada, em função dos resultados obtidos. Através da utilização de uma tabela apropriada, pode-se verificar, rapidamente, a nível de campo, se o número de amostras é suficiente, ou se a amostragem deve continuar sendo... |
| Tipo: Folhetos |
Palavras-chave: Monitoramento; Wood wasp; Damage; Espécie exótica; Praga de planta; Amostragem; Dano; Praga; Sirex Noctilio; Vespa da Madeira; Pinus; Monitoring; Pests; Sampling. |
| Ano: 2002 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/306552 |
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| Registros recuperados: 55 | |
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