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Registros recuperados: 16
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Controle químico da cigarrinha-do-milho e incidência dos enfezamentos causados por molicutes. Repositório Alice
OLIVEIRA, C.M.; OLIVEIRA, E. de; CANUTO, M.; CRUZ, I..
O objetivo deste trabalho foi verificar a eficiência do tratamento inseticida de sementes de milho no controle de Dalbulus maidis e na redução da incidência de enfezamentos em viveiro telado e em campo. Foram realizados dois experimentos; no experimento 1, em viveiro telado, sementes de milho foram tratadas com imidacloprid e thiamethoxan e, nessas plantas, cigarrinhas sadias, cigarrinhas infectantes com fitoplasma ou com espiroplasma foram confinadas. Avaliaram-se eficiência de controle, incidência de plantas com enfezamentos, altura das plantas e produção de grãos. No experimento 2, em campo, imidacloprid e thiamethoxan foram utilizados em tratamento de sementes e pulverizações aos 10 e 20 dias após a semeadura. A incidência de enfezamentos e a produção...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Zea mays; Dalbulus maidis; Spiroplasma kunkelii; Neonicotinóides; Fitoplasma; Neonicotinoids; Phytoplasma.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/121846
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"Enfezamento pálido" e "enfezamento vermelho" na cultura do milho no Brasil Central. Repositório Alice
OLIVEIRA, E.; WAQUIL, J.M.; FERNANDES, F.T.; PAIVA, E.; RESENDE, R.O.; KITAJIMA, E.W..
Foi constatada alta incidencia de plantas com sintomas de "Enfezamento Palido" e de "Enfezamento vermelho" em lavouras de milho no Brasil Central. Na mesma area observou-se a presenca de cigarrinha Dalbulus maidis em alta densidade. A presenca de espiroplasma foi confirmada apenas em plantas com sintomas de "Enfezamento Palido", atraves de teste DAS-ELISA. Os resultados da analise por PCR indicaram a presenca de fitoplasma em algumas amostras de plantas com sintomas do "enfezamento Vermelho".
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Milho; Doenca; Enfezamento; Palido; Vermelho; Fitoplasma; Espiroplasma; Cigarrinha; PCR; Brasil Central; Cerrado; Zea mays; Dalbulus maidis; Brasil; Spiroplasma; Savanna; Phytoplasma; Disease; Maize.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/478889
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Enfezamentos em milho: expressão de sintomas foliares, detecção dos molicutes e interações com genótipos. Repositório Alice
OLIVEIRA, E. de; OLIVEIRA, C.M. de; SOUZA, I. R. P. de; MAGALHAES, P. C.; CRUZ, I..
Com o objetivo de verificar a multiplicacao, expressao de sintomas foliares e efeito dos molicutes na producao de diferentes genotipos de milho, fitoplasma e Spiroplasma kunkelii foram inoculados, isolada ou simultaneamente, em cinco cultivares, mantidas em vasos ate a producao. Plantas sadias de todas as cultivares foram utilizadas como controle. Em cada vaso, foram cultivadas duas plantas, sendo uma utilizada para a deteccao dos molicutes na ultima folha completamente expandida, aos 30, 60 e 100 dias apos a inoculacao. A outra planta foi utilizada para deteccao dos molicutes nas folhas inferiores, medianas e apicais, aos 100 dias apos a inoculacao. O percentual de reducao causado pelos molicutes na altura e na producao de graos foi determinado nas duas...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Milho; Fitoplasma; Espiroplasma; Multiplicacao; Molicutes; Zea mays; Maize; Phytoplasma; Spiroplasma; Multiplication; Mollicutes.
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/480747
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Heteroptera as vectors of plant pathogens Neotropical Entomology
Mitchell,Paula L..
The ability of piercing-sucking insects to transmit plant disease is closely linked to feeding mode and target tissue. The true bugs (Heteroptera) are generally considered to be of minimal importance as vectors of plant pathogens, although they share similar feeding behaviors with homopterans. Modes of feeding in Heteroptera include "lacerate-and-flush", intracellular penetration to vascular tissue, and an osmotic pump mechanism to acquire cell contents without penetrating the cell membrane. The relationship between heteropteran taxonomy, feeding mode, and the type of pathogens transmitted is explored through a literature survey of feeding behavior and vectoring capability. Transmission by true bugs of fungal pathogens, bacteria, viruses, phytoplasmas, and...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Insect vector; True bug; Transmission; Trypanosome; Phytoplasma.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000500001
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Identificação e diagnose molecular de fitoplasmas associados ao couro-de-sapo da mandioca (Manihot esculenta Crantz). Repositório Alice
ARAÚJO, T. da S.; ABREU, E. F. M.; OLIVEIRA, S. A. S. de; OLIVEIRA, E. J. de.
A mandioca (Manihot esculenta Crantz) possui grande importância econômica mundial, principalmente em países em desenvolvimento, é uma das maiores fonte de carboidratos e é cultivada em todo território brasileiro. O país ocupa o segundo lugar no ranking mundial, em termos de produção, estando atrás apenas da Nigéria.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Fitoplasma; Couro de sapo; PCR; Manihot esculenta Crantz; Mandioca; Phytoplasma; Cassava; Manihot esculenta.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/966184
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Importancia de las arvenses en la dispersión del amarillamiento letal del cocotero. Colegio de Postgraduados
Terán Villanueva, Nelba.
El cocotero (Cocos nucifera) uno de los cultivos tropicales de mayor importancia económica por su contribución sustancial a la seguridad alimentaria, se ha visto afectado por la enfermedad conocida como amarillamiento letal del cocotero (ALC), una de las más devastadores y que se ha localizado en todas las regiones productoras de México. El objetivo de la presente investigación fue analizar el papel que juegan las arvenses en la dispersión del ALC; para ello se realizó un registro de la flora asociada a la plantación, identificándose taxonómicamente las especies de plantas (arvenses); se hicieron análisis moleculares para detectar la presencia del fitoplasma de dicha enfermedad en las arvenses en ocho sitios dentro de la plantación. Posteriormente se...
Palavras-chave: Fitoplasma; PCR en tiempo real; Flora asociada; ALC; Myndus crudus; Phytoplasma; Real-time PCR; Associated flora; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2014 URL: http://hdl.handle.net/10521/2381
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Incidence of corn stunt disease in off-season corn hybrids in different sowing seasons PAB
Costa,Rodrigo Véras da; Silva,Dagma Dionísia da; Cota,Luciano Viana; Campos,Leonardo José Motta; Almeida,Rodrigo Estavam Munhoz de; Bernardes,Fernanda Pinheiro.
Abstract: The objective of this work was to evaluate the incidence of corn stunt disease and its effects on the grain yield of off-season corn (Zea mays) hybrids in different sowing seasons. The experiment was conducted in three sites in the state of Tocantins, in different sowing seasons, in a randomized complete block design, with 30 hybrids (treatments) and three replicates. Corn stunt disease incidence was assessed at 80 days after emergence, varying between hybrids and sowing seasons, with a marked effect of sowing season. The most resistant hybrids were: MG652 PW, Penta VIP, MG600 PW, NS90 PRO2, LG3040 VIP3, MG580 PW, and Defender VIP. The Fórmula VIP2 hybrid was the most susceptible to corn stunt disease. The incidence of the disease increased in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dalbulus maidis; Zea mays; Genetic resistance; Mollicutes; Phytoplasma; Spiroplasma.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102303
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Molecular confirmation of Maize rayado fino virus as the Brazilian corn streak virus Scientia Agricola
Hammond,Rosemarie Wahnbaeck; Bedendo,Ivan Paulo.
Maize rayado fino virus (MRFV), present in various countries in Latin America, has shown similarities to corn streak virus that occurs in Brazil, regarding pathogenic, serological and histological characteristics. In the current report both virus were molecularly compared to confirm the similarities between them. MRFV was identified by nucleic acid hybridization in samples of maize tissues exhibiting symptoms of "corn stunt" disease, collected from two Brazilian States - São Paulo and Minas Gerais. The coat protein gene and 3'non-translated region of MRFV were amplified from infected tissues by reverse transcription-polymerase chain reaction (RT-PCR) using MRFV-specific primers, and were characterized by nucleotide sequence and phylogenetic analysis of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: MRF virus; Corn viruses; Phytoplasma; Corn stunt.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000600015
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Molecular detection and classification of the phytoplasma that causes purple top in potatoes (Solanum tuberosum) in the State of Mexico Ciencia e Investigación Agraria
Gutiérrez-Ibáñez,Ana T; Laguna-Cerda,Antonio; Rojas-Martínez,Reina; González-Garza,Ramiro; Salgado-Siclán,Martha L.
The Mexican potato (Solanum tuberosum L.) crop is affected by several diseases, including purple top (PPT). PPT is caused by phytoplasma and is transmitted by insects in the Cicadellidae family. In severe infections, this pathogen can cause yield losses of nearly 100%. The objective of this research was to identify and classify (at a molecular level) the causal agents of PPT. Potato plants were sampled in the state of Mexico (at Tenango del Valle, Zinacantepec, Atlacomulco and Donato Guerra) in the spring and summer of 2006. Approximately 40% of the plants tested positive for phytoplasma. The presence of plant DNA was determined by amplifying an endogenous gene with the 16s-1/16s-2 primers. To detect phytoplasma, the P1/P7 universal primers were used for...
Tipo: Journal article Palavras-chave: Phytoplasma; Potato diseases; Potato purple top.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000200010
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Molicutes e vírus em milho na safrinha e na safra de verão. Repositório Alice
OLIVEIRA, E. de; CARVALHO, R.V. de; DUARTE, A.P.; ANDRADE, R. A. de; RESENDE, R. de O.; OLIVEIRA, C.M. de; RECCO, P.C..
A incidência de plantas de milho com sintomas de enfezamentos causados por molicutes ou de infecção por vírus foi avaliada em um ensaio com 22 cultivares, plantadas na safrinha e na safra de verão, em diferentes locais nos estados de São Paulo, Goiás e Minas Gerais. Essas avaliações foram feitas a partir da safrinha de 1999 até a safrinha de 2001. Amostras de folhas com sintomas de enfezamentos foram submetidas à extração de DNA e ao teste de PCR, para determinação dos índices de infecção por fitoplasma e por espiroplasma. Amostras de folhas com sintomas de viroses foram submetidas a testes RT-PCR, para confirmação da identificação do vírus. Em geral, a incidência de sintomas de enfezamentos foi maior na safrinha que na safra de verão, exceto no Estado de...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Milho; Molicute; Virus; Espiroplasma; Fitoplasma; Zea mays; Maize; Viruses; Spiroplasma; Phytoplasma.
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/485852
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Presence of a Phytoplasma Associated with Witches’-Broom Disease in Ugni molinae Turcz. and Gaultheria phillyreifolia (Pers.) Sleumer Determined by DAPI, PCR, and DNA Sequencing Chilean J. Agric. Res.
Arismendi S,Nolberto; Andrade S,Nancy; Riegel Sch,Ricardo; Carrillo Ll,Roberto.
Murta (Ugni molinae Turcz.) and common chaura (Gaultheria phillyreifolia (Pers.) Sleumer) are native species of Chile. Plants of both species have shown over-branching like witches' broom. The causal agents of these symptoms in many plants are phytoplasma. To verify the presence of these microorganisms, DAPI (4',6-diamidino-2-phenylindole) staining analysis and polymerase chain reaction (PCR) were performed in symptomatic and asymptomatic plants. Positive PCR samples were sequenced to identify the pathogens involved. In individuals of both species with witches’ broom symptoms, DAPI staining showed fluorescent bodies in the phloem tissues, but not in asymptomatic plants. Verification by nested-PCR, phytoplasmatic DNA was amplified from diseased murta and...
Tipo: Journal article Palavras-chave: Native shrubs; Witches’ broom; Phytoplasma; Microscopic and molecular tools.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100003
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Transmission of "Candidatus Phytoplasma pruni"-related strain associated with broccoli stunt by four species of leafhoppers. Repositório Alice
KREYCI, P. F.; ECKSTEIN, B.; LOPES, J. R. S; FERREIRA, J.; BEDENDO, I. P..
bitstream/item/181221/1/Kreyci-et-al-2018-Journal-of-Phytopathology.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Phloem bacteria; Wall-less bacteria; Insect vectors; Phytoplasma.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1094043
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การทดสอบพืชอาหารของเพลี้ยจักจั่น Matsumuratettix hiroglyphicus (Matsumura) พาหะนำโรคใบขาวอ้อย Thai Agricultural
Sukritta Anutrakunchai; Jureemart Wangkeeree; Yupa Hanboonsong.
Tipo: PhysicalObject Palavras-chave: Leafhopper; Matsumuratettix hiroglyphicus; Insect vectors; Sugarcane white leaf disease; Phytoplasma; Sugarcane; Weeds reservoir; Survival rate; เพลี้ยจักจั่น; แมลงพาหะนำโรค; โรคใบขาวอ้อย; เชื้อไฟโตพลาสมา; พืชอาหาร; อ้อย; วัชพืช; อัตราการรอดชีวิต; การเจริญเติบโต; การขยายพันธุ์.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5832
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ความหลากหลายทางพันธุกรรมของเชื้อไฟโตพลาสมาที่ก่อโรคในอ้อย และหญ้าบางชนิดของประเทศไทย จากลำดับนิวคลีโอไทด์บริเวณ 16S-23S rRNA intergenic spacer region Thai Agricultural
Suchirat Sakuanrungsirikul; Theerawut Wongwarat; Sunee Srisink; Piyada Theerakulpisut.
The phylogenetic analysis of phytoplasmas focused on the nucleotide sequences of the intergenic 16s-23s rRNA spacer region that primers enable the amplification of a 210 bp fragment by nested-PCR, are established for studying of genetic diversity of phytoplasma associated with diseases of sugarcane and some grasses in Thailand. In this present study, 99 phytoplasma infected sugarcane samples exhibiting various phenotypic symptoms and 15 samples of grasses showing white leaves were collected from many locations in Thailand and subjected for nucleotide sequencing. Phylogenetics tree based on 16S-23S ITS gene sequences showed two primary clusters: (1) phytoplasmas that cause diseases in sugarcane and (2) phytoplasmas that cause diseases in grasses. The...
Tipo: Collection Palavras-chave: Phytoplasma; Sequencing analysis; White leaves diseases; Genetic diversity; อ้อย; โรคใบขาว; ไฟโตพลาสมา; เชื้อสาเหตุโรค; ลำดับนิวคลีโอไทด์; ความหลากหลายทางพันธุกรรม.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5551
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ประชากรแมลงพาหะ (Matsumuratettix hiroglyphicus (Matsumura)) และการเกิดโรคใบขาวอ้อยในระบบการปลูกข้าวไร่สลับกับอ้อย และระบบปลูกอ้อยเชิงเดี่ยว Thai Agricultural
Itsarapong Voraphab; Yupa Hanboonsong.
Tipo: PhysicalObject Palavras-chave: Leafhopper; Matsumuratettix hiroglyphicus; Insect vectors; Phytoplasma; Sugarcane white leaf disease; Mono cropping; Crop rotation; Disease epidemiology; เพลี้ยจักจั่น; แมลงพาหะนำโรค; โรคใบขาวอ้อย; เชื้อไฟโตพลาสมา; การสำรวจแมลงพาหะ; อ้อย; ข้าวไร่; ระบบการปลูกพืช; การปลูกพืชเชิงเดี่ยว; การปลูกพืชหมุนเวียน; การระบาดของโรคพืช.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5831
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ผลของอุณหภูมิต่อแมลงพาหะ Matsumuratettix hiroglyphicus นำโรคใบขาวอ้อย Thai Agricultural
Chananat Kaewmanee; Yupa Hanboonsong; Tasanee Jamjanya.
Tipo: PhysicalObject Palavras-chave: Leafhopper; Matsumuratettix hiroglyphicus; Insect vectors; Phytoplasma; Sugarcane white leaf disease; SCWL; Temperature; Reproduction; Multiplication; Disease transmission efficiency; Disease outbreak; Sugarcane; เพลี้ยจักจั่น; แมลงพาหะนำโรค; เชื้อไฟโตพลาสมา; โรคใบขาวอ้อย; อุณหภูมิ; การเจริญพันธุ์ของแมลงพาหะ; การเจริญเติบโตของเชื้อโรค; การถ่ายทอดเชื้อโรค; อ้อย; การระบาดของแมลงพาหะ; การแพร่กระจายเชื้อโรค.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5821
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