Consulta: subjectFacets:"Leucoptera coffeella"
Registros recuperados: 12
Data/hora: 09/06/2024 16:58:02

Spray deposition and chemical control of the coffee leaf-miner with different spray nozzles and auxiliary boom
Provedor de dados: 70
Autores: GITIRANA NETO,JEFFERSON; CUNHA,JOÃO P. A. R. DA.
ABSTRACT The coffee crop requires great spray ability to penetrate into the plant canopy during the application of pesticides. The aim of this study was to evaluate the spray deposition on leaves of coffee plants and the chemical control of the leaf miner provided by the application of different spray nozzles, with and without the use of an auxiliary boom. The deposition on the upper, middle and lower parts of the plants and the losses to the soil were evaluated using a tracer quantified by spectrophotometer. We also evaluated the chemical control of the leaf miner, counting the larvae, after the application of the insecticides cartap and fenpropathrin. The trial was carried out in a randomized block design, with four replications, in a factorial model...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica L; Leucoptera coffeella; Spray; Application technology.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000400656

Microsatellite markers in analysis of resistance to coffee leaf miner in Arabica coffee
Provedor de dados: 86
Autores: Pereira,Gabriella Santos; Padilha,Lilian; Pinho,Edila Vilela Resende Von; Teixeira,Rita de Kássia Siqueira; Carvalho,Carlos Henrique Siqueira de; Maluf,Mirian Peres; Carvalho,Bruna Line de.
The objective of this work was to analyze coffee (Coffea arabica) genotypes resistant to the coffee leaf miner (Leucoptera coffeella) using microsatellite markers. Sixty-six loci were evaluated, of which 63 were obtained from the Brazilian Coffee Expressed Sequence Tag (EST) database. These loci were amplified in bulks of individuals from F5 progenies of 'Siriema' (C. arabica x C. racemosa) resistant and susceptible to the insect, in eight samples of C. racemosa, and in a F6 population of 'Siriema' with 91 individuals segregating for resistance to the leaf miner. Polymorphisms were verified for two simple sequence repeat (SSR) loci in bulks of the susceptible progenies. The two polymorphic alleles were present in around 70% of the susceptible genotypes in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica; Leucoptera coffeella; EST-SSR; Genotypes.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011001200010

Study of simple sequence repeat markers from coffee expressed sequences associated to leaf miner resistance
Provedor de dados: 86
Autores: Pinto,Fernanda de Oliveira; Maluf,Mirian Perez; Guerreiro-Filho,Oliveiro.
The objective of this work was to identify expressed simple sequence repeats (SSR) markers associated to leaf miner resistance in coffee progenies. Identification of SSR markers was accomplished by directed searches on the Brazilian Coffee Expressed Sequence Tags (EST) database. Sequence analysis of 32 selected SSR loci showed that 65% repeats are of tetra-, 21% of tri- and 14% of dinucleotides. Also, expressed SSR are localized frequently in the 5'-UTR of gene transcript. Moreover, most of the genes containing SSR are associated with defense mechanisms. Polymorphisms were analyzed in progenies segregating for resistance to the leaf miner and corresponding to advanced generations of a Coffea arabica x Coffea racemosa hybrid. Frequency of SSR alleles was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leucoptera coffeella; Microsatellites; Molecular markers.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000300011

Risk analysis of climate change on coffee nematodes and leaf miner in Brazil
Provedor de dados: 86
Autores: Ghini,Raquel; Hamada,Emília; Pedro Júnior,Mário José; Marengo,José Antonio; Gonçalves,Renata Ribeiro do Valle.
The objective of this work was to assess the potential impact of climate change on the spatial distribution of coffee nematodes (races of Meloidogyne incognita) and leaf miner (Leucoptera coffeella), using a Geographic Information System. Assessment of the impacts of climate change on pest infestations and disease epidemics in crops is needed as a basis for revising management practices to minimize crop losses as climatic conditions shift. Future scenarios focused on the decades of the 2020's, 2050's, and 2080's (scenarios A2 and B2) were obtained from five General Circulation Models available on Data Distribution Centre from Intergovernmental Panel on Climate Change. Geographic distribution maps were prepared using models to predict the number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica; Leucoptera coffeella; Meloidogyne incognita; Global warming; Pest zoning.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000200005

Toxicity of organic farming‑compatible products to the coffee leaf miner
Provedor de dados: 86
Autores: Venzon,Madelaine; Krüger,Rodrigo Ferreira; Soto,Alberto; Tuelher,Edmar de Souza; Bonomo,Italo Santos; Fadini,Marcos Antonio Matiello; Fonseca,Maira Christina Marques.
The objective of this work was to evaluate the toxicity of organic farming‑compatible products to the coffee leaf miner Leucoptera coffeella. Lime sulphur, enriched Bordeaux mixture (Viça Café Plus), and the "supermagro" biofertilizer were first tested in laboratory. The most promising product was tested afterwards under field conditions. In laboratory, different concentrations of each product were applied on L. coffeella eggs and on infested coffee‑mined leaves. Only lime sulphur had ovicidal effects at an acceptable concentration (1.6%) for field applications, but no significant effect on larvae mortality was found. Enriched Bordeaux mixture and the "supermagro" biofertilizer had no effect on L. coffeella eggs and larvae. In the field trial, biweekly or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leucoptera coffeella; Biofertilizer; Bordeaux mixture; Lime sulphur.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000300001

Leaf miner incidence in coffee plants under different drip irrigation regimes and planting densities
Provedor de dados: 86
Autores: Assis,Gleice Aparecida; Assis,Franscinely Aparecida; Scalco,Myriane Stella; Parolin,Francisco José Toloza; Fidelis,Iraci; Moraes,Jair Campos; Guimarães,Rubens José.
The objective of this work was to evaluate the effect of different drip irrigation regimes and planting densities on the incidence of the leaf miner, Leucoptera coffeella, in arabica coffee plants for one year. The experiment was carried out in 2008, in a complete randomized block design, in a split-plot in time arrangement, with four replicates. The treatments consisted of four drip irrigation regimes - soil water balance, irrigations at 20 and 60 kPa soil tensions, and a nonirrigated treatment -, which were distributed at three plant densities: 2, 500, 5, 000, and 10, 000 plants per hectare. The evaluations were made on a monthly basis between January and December 2008. The highest pest occurrence period was from August to November, a season with low-air...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica; Leucoptera coffeella; Irrigation; Spacing; Weather factors.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000200002

Caracterização anatômica de folhas de cafeeiros resistentes e suscetíveis ao bicho-mineiro
Provedor de dados: 53
Autores: Ramiro,Daniel Alves; Guerreiro-Filho,Oliveiro; Queiroz-Voltan,Rachel Benetti; Matthiesen,Silvia Chebabi.
O bicho-mineiro, Leucoptera coffeella (Guérin-Méneville, 1842) (Lepidoptera :Lyonetiidae), é a principal praga da cultura cafeeira, chegando a causar prejuízos superiores a 50% na produção, em virtude da queda prematura das folhas e redução da área fotossintética. O programa de melhoramento genético do cafeeiro do Instituto Agronômico (IAC) utiliza a espécie Coffea racemosa como doadora de genes de resistência a L. coffeella para C. arabica. O objetivo deste trabalho foi realizar uma caracterização comparativa do tecido foliar e relacioná-la ao ataque de L. coffeella nas espécies genitoras C. arabica e C. racemosa, e em plantas híbridas oriundas desse cruzamento, com diferentes níveis de resistência, visando fornecer ferramentas para futura identificação...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Café; Leucoptera coffeella; Resistência a insetos; Parênquima paliçádico.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052004000300006

Flutuação populacional do bicho-mineiro em cultivares de café arábica resistentes à ferrugem
Provedor de dados: 53
Autores: Conceição,Celso Henrique Costa; Guerreiro-Filho,Oliveiro; Gonçalves,Wallace.
A intensidade de infestação pelo bicho-mineiro, Leucoptera coffeella (Guérin-Méneville) (Lepidoptera: Lyonetiidae) foi investigada nas cultivares Obatã IAC 1669-20 e Tupi IAC 1669-33, com resistência à ferrugem das folhas do cafeeiro, Hemileia vastatrix Berk. et Br., e Ouro Verde Amarelo IAC 4397, suscetível à doença, em ensaios de campo, localizados em Campinas (SP), Brasil. A incidência de ferrugem e a ocorrência de inimigos naturais da praga, assim como o enfolhamento das plantas, foram também observados nas três cultivares. As curvas de flutuação populacional obtidas para Obatã IAC 1669-20 e Tupi IAC 1669-33 revelaram maior incidência do bicho-mineiro entre abril e novembro. Já na cultivar Ouro Verde Amarelo IAC 4397, observaram-se dois picos de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica; Hemileia vastatrix; Leucoptera coffeella; Manejo de pragas.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052005000400012

Coffee leaf miner resistance
Provedor de dados: 61
Autores: Guerreiro Filho,Oliveiro.
The coffee leaf miner, Leucoptera coffeella, is a common pest of coffee plantations in Brazil. Though it is effective, chemical control substantially increases the cost of production and constitutes a significant risk for the environment. Resistant coffee cultivars have been and continue being developed through classic and molecular selection techniques. Basic knowledge about the biology of this insect, the damage it causes to the plants, the identification of sources of resistance, the development of efficient selection methods and knowledge about the genetics of resistance have contributed to the efficiency of the ongoing genetic improvement programs. Recently, coffee genomics studies have also promoted an improvement in the efficiency of the development...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea; Defense mechanisms; Leucoptera coffeella; Plant-insect interaction.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100009

Effect of pigeon pea intercropping or shading with leucaena plants on the occurrence of the coffee leaf miner and on its predation by wasps in organic coffee plantings
Provedor de dados: 65
Autores: Hoshino,Adriano Thibes; Bortolotto,Orcial Ceolin; Hata,Fernando Teruhiko; Ventura,Mauricio Ursi; Menezes Júnior,Ayres de Oliveira.
ABSTRACT: The infestation of coffee leaf miner and its predation by wasps were assessed in commercial organic coffee plantings shaded with leucaena or intercropped with pigeon pea. Plantings in northern Paraná were assessed every two weeks from June 2011 to December 2012. The percent of infested leaves, number of mines per leaf and the percent of predation by wasps (indicated by lacerations) were determined. Fewer coffee leaf miners and fewer mines per leaf were found in pigeon pea intercropped plantings (28.4% and 0.3, respectively) than in shaded plantings with leucaena (48.1% and 0.8, respectively). More predation by wasps was found in the shaded (27.2%) than in the intercropped (13.2%) plantings. Suggestions for new studies are presented along with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leucoptera coffeella; Coffee pests; Organic farming; Biological control.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000300153

Spatial and temporal dynamics of coffee-leaf-miner and predatory wasps in organic coffee field in formation
Provedor de dados: 65
Autores: Scalon,João Domingos; Avelar,Maria Betania Lopes; Alves,Gabriela de Freitas; Zacarias,Maurício Sérgio.
The coffee production is an economic mainstay for many countries in the world. Brazil is the world's largest producer and exporter of coffee, being responsible for about 25% of the world production. It is well known that coffee plantations are susceptible to more than 850 fungal and insect pests. Among these pests, the most important significant throughout Brazil is the coffee-leaf-miner, [Leucoptera coffeella (Guérin-Mèneville &amp;amp; Perrottet, 1842) (Lepidoptera: Lyonetiidae)]. It is estimated that the loss in yield due to infestation by L. coffeella moths can increase to as much as 80% in areas where the coffee-leaf-miner larvae are not controlled. Though it is effective, the chemical control of the pest substantially increases the cost of production...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leucoptera coffeella; Hymenoptera: Vespidae; Bootstrap; Morisita.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000400016

Extrato de Coffea racemosa como alternativa no controle do bicho-mineiro do cafeeiro
Provedor de dados: 64
Autores: Alves,Dejane Santos; Oliveira,Denilson Ferreira; Carvalho,Geraldo Andrade; Santos,Mírian Aparecida Isidro.
Objetivou-se, com o presente trabalho, verificar o efeito do extrato metanólico de Coffea racemosa Lour., espécie silvestre de cafeeiro portadora de resistência a uma das principais pragas da cultura cafeeira, o bicho-mineiro. Inicialmente, o extrato metanólico das folhas de C. racemosa foi pulverizado em mudas de cafeeiro Coffea arabica cv. Catuaí, em casa-de-vegetação, as quais foram expostas a adultos de L. coffeella para o teste de oviposição com chance de escolha. Observou-se que as plantas tratadas foram menos preferidas para oviposição. A seguir, realizou-se o teste de efeito ovicida, no qual mudas de C. arabica contendo ovos do bicho-mineiro foram pulverizadas com o mesmo extrato. Os experimentos foram conduzidos em delineamento inteiramente...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leucoptera coffeella; Inseticida botânico; Café; Produtos naturais.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000200004