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Busca de compostos em Chenopodium spp. (Chenopodiaceae) com bioatividade em relação a pragas de grãos armazenados; Searching for Chenopodium spp. (Chenopodiaceae) compounds with bioactivity against stored grain pests

Tavares, Márcio Aurélio Garcia Correia
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 18/12/2006 PT
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Este trabalho foi realizado com o objetivo de avaliar a bioatividade de pós, extratos aquosos e não aquosos (hexano, clorofórmio e metanol) de folhas e frutos de Chenopodium ambrosioides L., Chenopodium quinoa Willd. e Chenopodium album L. sobre as pragas de grãos armazenados, Sitophilus zeamais Mots. e Rhyzopertha dominica (Fabr.), bem como avaliar o potencial inseticida do óleo essencial de C. ambrosioides, e o efeito repelente e inseticida de algumas substâncias (limoneno, α-pineno e p-cimeno) constituintes deste. As plantas de Chenopodium spp. foram cultivadas na área experimental do Departamento de Entomologia, Fitopatologia e Zoologia Agrícola da ESALQ/USP, de maneira a possibilitar a coleta das respectivas estruturas vegetais e posterior obtenção dos pós (através de secagem e moagem) e extratos aquosos (imersão dos pós em água por 24 horas) e não aquosos (maceração com solventes). O óleo essencial de C. ambrosioides foi obtido pelo processo de hidrodestilação. Análises dos constituintes dos óleos essenciais foram feitas por cromatografia gasosa acoplada à espectroscopia de massas (CG/EM). Os insetos utilizados nos ensaios foram obtidos de criação mantida em grãos de trigo. Avaliou-se o efeito dos pós...

Uso de geoestatística para aprimorar o controle de pragas na citricultura.; Use of geoestatistical to improve the pests control in citrus plants.

Okumura, Miriam Harumi
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 24/10/2007 PT
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A preocupação com o desenvolvimento de novas tecnologias que priorizem o menor impacto ambiental, é cada vez maior. Esta tendência também ocorre na agroindústria, onde a preocupação com a redução de uso de defensivos agrícolas já é grande. Os problemas fitossanitários sempre foram barreiras que impediram o desenvolvimento da produtividade da citricultura, apenas ácaro da leprose (Brevipalpus phoenicis) representa cerca de 80 % dos custos destinados ao controle de pragas. O desenvolvimento de novas tecnologias, que colaborem com o controle de pragas e doenças já existentes, e outras que podem surgir, são uma necessidade deste setor. Nesta pesquisa foram utilizadas ferramentas informatizadas, utilizadas com sucesso no setor mineiro, no estudo dos ácaro da falsa ferrugem (Phyllocoptruta oleiva), ácaro branco (Plyphagotarsonemus latus) e ácaro da leprose (Brevipalpus phoenicis) com o objetivo de aprimorar o planejamento e gerenciamento da aplicação localizada de defensivos agrícolas, permitindo a verificação das variações espaciais e temporais dos fatores relacionados ao controle dessas pragas que prejudicam a produção citrícola. Estas ferramentas possuem análises geoestatísticas, que são primordiais para a modelagem espacial de fenômenos naturais...

Potencialidade dos fungos entomopatogênicos Isaria fumosorosea e Beauveria bassiana para o controle de pragas dos citros; Potential of the entomopathogenic fungi Beauveria bassiana AND Isaria fumosorosea for the control of citrus pest

Conceschi, Marcos Roberto
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 20/01/2014 PT
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A cultura dos citros é considerada de muita importância para a economia brasileira. Atualmente, o inseto Diaphorina citri tem sido considerado como o principal problema dessa cultura, por ser vetor da bactéria Candidatus Liberibacter asiaticus (?-Proteobacteria) causadora da doença conhecida como Greening. Além de D. citri, a cultura dos citros apresenta inúmeras espécies de insetos e ácaros pragas que reduzem a qualidade e a produção dos frutos e requerem medidas de controle. O controle das espécies pragas tem sido realizado quase exclusivamente por aplicações frequentes de pesticidas químicos. Recentemente, isolados dos fungos entomopatogênicos Isaria fumosorosea e Beauveria bassiana foram selecionados para o controle de D. citri. Nesse estudo investigou-se a patogenicidade destes isolados associados a adjuvantes no controle de ninfas e adultos dos insetos Diaphorina citri, Toxoptera citricida, Aleurocanthus woglumi, Praelongorthezia praelonga e adultos dos ácaros Brevipalpus phoenicis e Panonychus citri em condições de laboratório. Notou-se que os fungos estudados foram patogênicos para quase todas as espécies de pragas, com a execção do fungo B. bassiana para ninfas e adultos de P. praelonga. As maiores mortalidade provocadas pelos fungos entomopatogênicos foram obtidas para ninfas e adultos de D. citri (>86% e 55...

Termite pests in eucalyptus forests of brazil

Wilcken, Carlos Frederico; Raetano, Carlos Gilberto; Forti, Luiz Carlos
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Conferência ou Objeto de Conferência Formato: 179-190
ENG
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The termite problem in eucalyptus forest plantations in Brazil has been registered since 1908. The main termite pests can be separated in four groups: a) seedling/sapling termites; b) heartwood termites; c) bark termites and d) wood termites. The termites in the first group attack root and stalk bases of young eucalyptus plants. The most common species are Syntermes spp. and Cornitermes spp. and they are a serious obstacle to early eucalyptus developing. The heartwood termites attack formed trees destroying eucalyptus heartwood. Coptotermes testaceus is the most cited species in reports, but more species probably occur. Plant mortality caused by seedling/sapling termites vary of 10-70 %. There are not effective control methods to heartwood termites. The main seedling/sapling termite control strategy is the chemical barrier around root systems of plants. Nowadays, studies are being carried out to determine monitoring systems to termite infestations. Early results indicate that proportionally, few areas really need insecticide application, due to spatial distribution of termites to be aggregated. Therefore, it is necessary to develope techniques rationalizing insecticide utilization in eucalyptus plantations, to keep production systems feasible and to be suitable for environmental exigencies.

Effect of reduced fungicide doses on control of soybean Asian rust and bean yield

Feliciani Barbosa, Giselle; Da Cruz Centurion, Maria Aparecida Pessôa; Tardivo Marin, Beatriz; Feliciani Barbosa, Grazielle
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 347-352
ENG
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); One of the diseases of greatest importance for soybean [Glycine max (L.) Merrill] crops is the soybean Asian rust, caused by the fungus Phakopsora pachyrhizi Sydon & P. Sydon. One of the main methods of control is through the use of chemical fungicides. The objective of this study was to evaluate the effects of reduced doses of the fungicides azoxystrobin +ciproconazol +mineral oil and tebuconazol, with two application intervals (10 and 20 days), on two soybean cultivars [NK-412113 (V Max) and MG/BR-46 (Conquista)], for the control of soybean rust, as well as their effects on yield. A field assay was conducted during spring-summer 2006/2007. Disease severity assessment was done at 10 days intervals, before fungicide spraying, using a diagrammatic scale. For the early cultivar (NK-412113), the use of reduced fungicide doses did not change disease severity. For the semi early cycle cultivar (MG/BR-46), reduced doses were not significantly different from the recommended doses for soybean rust control. A yield increase was observed in cultivar MG/BR-46 with fungicide spraying, but not for NK-412113. When the disease affects plants at critical stages related to the formation of pods and grains...

Assistência de ar em pulverização no manejo fitossanitário na cultura da soja Glycine max (L.) Merrill

Prado, Evandro Pereira
Fonte: Universidade Estadual Paulista (UNESP) Publicador: Universidade Estadual Paulista (UNESP)
Tipo: Dissertação de Mestrado Formato: vii, 94 f. : il. color., grafs, tabs.
POR
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Pós-graduação em Agronomia (Proteção de Plantas) - FCA; Com o intuito de melhorar a eficiência de controle da ferrugem asiática Phakopsora pachyrhizi e insetos-pragas na cultura da soja, o presente trabalho avaliou diferentes técnicas de pulverização sobre o depósito da calda. Cinco experimentos foram conduzidos na área experimental da FCA/UNESP – Campus de Botucatu, na cultura da soja (var. Conquista), dois na safra 2006/07 e três na safra 2007/08. Os experimentos 1 e 2 foram conduzidos no delineamento em blocos ao acaso no esquema fatorial 2x2+1 (dois níveis de ar, 0 e 100%; duas pontas de pulverização, JA-2 e AXI 11002, mais testemunha). Realizou-se uma única aplicação com os inseticidas tiametoxam + lambda-cialotrina (exp. 1) e endosulfan (exp. 2), com volume de calda de 200 L ha-1. As avaliações antes (prévia) e com 1, 3, 6, 10 e 14 dias após a aplicação foram realizadas pelo método de batidas-no-pano. O experimento 3 foi conduzido no mesmo local, no delineamento experimental de blocos ao acaso (quatro velocidades de ar: 0, 9, 11 e 29 km h-1 e testemunha) totalizando 5 tratamentos e 4 repetições. Foi realizada uma pulverização do inseticida deltametrina para o controle de lagartas desfolhadoras e do inseticida tiametoxam + lambda-cialotrina visando o controle de percevejos. Foram avaliados: a eficiência dos produtos nos diferentes tratamentos...

Thevetia peruviana (Family: Apocynaceae) in the control of slug and snail pests

Panigrahi,A.; Raut,S. K.
Fonte: Instituto Oswaldo Cruz, Ministério da Saúde Publicador: Instituto Oswaldo Cruz, Ministério da Saúde
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/1994 EN
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An aqueous extract prepared from Kernels of the fruit of Thevetia peruviana (Pers.) Schumann (Family : Apocynaceae) was found under experimental conditions, to be toxic ti the slug Laevicaulis alte (Férussac) and the snail Achatina fulica Bowdich, the important agrihorticultural pests of Indo-Pacific countries. Concentrations as low as 1% (w/v) killed all the slugs exposed in less than 981.00 (± SD 22.76) min, and 2% of the extract killed 100% of the slugs L. alte and 50%, 50% and 30% of the snail A. fulica in between 92.34 (± SD 6.63) - 321.33 (± SD 4.14) and 271.20 (± SD 17.54) - 298.26 (± SD 16.69) min respectively. The most effective concentration of the extract was 20%; it killed 100% of exposed slugs and snails within a short time (40-50 and 90-1440 min respectively) when the extract was exposed on the soil in experimental trays or when it was applied to potato slices offered as food to the gastropods.

Occurence of thrips on Niagara table grape and its control with the insecticides thiacloprid and methiocarb associated with Metarhizium anisopliae

LOPES,ROGÉRIO BIAGGIONI; TAMAI,MARCO ANTONIO; ALVES,SÉRGIO BATISTA; SILVEIRA NETO,SINVAL; SALVO,SÉRGIO DE
Fonte: Sociedade Brasileira de Fruticultura Publicador: Sociedade Brasileira de Fruticultura
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2002 EN
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Thrips are reported as important pests on table grapes in United States and several countries of Europe. Damage caused by thrips, particulary Frankliniella occidentalis, was observed on niagara table grape crop in Limeira-SP, Brazil. During the blooming period, high thrips densities were observed feeding on pollen and small berries. The symptoms left were more visible after the development of the berries and were characterized by dark scars and suberized surface on berries, sometimes causing the berry to crack, and the seed to prolapse. The effect of insecticides thiacloprid or methiocarb, associated or not with the entomopathogenic fungus Metarhizium anisopliae were evaluated during the blooming period. For evaluation of thrips damage on fruits, the treatments were applied three additional times, 7, 14 and 21 days after the first application. The treatments were: a) M. anisopliae (strain 1037) 1x10(7) conidia/mL; b) thiacloprid 20mL/100L; c-d) methiocarb 100 and 150mL/100L; e) methiocarb 100mL/100L + M. anisopliae 1x10(7) conidia/mL. Only methiocarb, associated or not with the fungus, was effective in reducing thrips infestation, and no phytotoxic damage was observed. The efficiency of methiocarb 150mL/100L and the insecticide associated with the fungus for the control of the thrips population was 84.2 and 95.5%...

Advances and Perspectives of the use of the entomopathogenic fungi beauveria bassiana and metarhizium anisopliae for the control of arthropod pests in poultry production

Oliveira,DGP; Alves,LFA; Sosa-Gómez,DR
Fonte: Fundação APINCO de Ciência e Tecnologia Avícolas Publicador: Fundação APINCO de Ciência e Tecnologia Avícolas
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2014 EN
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Global poultry production is plagued by a wide variety of arthropods. The problems associated with their chemical control have led to an increasing search for control alternatives, and entomopathogenic fungi seem to be a promising strategy. Despite the large number of insects and mites considered as important pests in animal production, studies on the use of entomopathogenic fungi for their control are still scarce compared with agricultural pests, particularly in Brazil. This article reviews some damages and control aspects of the main arthropod pests that affect Brazilian poultry production, including house flies, lesser mealworms, and feather mites, by the use of the entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae. Studies published in the last 20 years were reviewed, and the main problems and limitations of that pest-control strategy are discussed.

Rootworm, Diabrotica speciosa (Coleoptera: chrysomelidae), control.

SANTOS, A. C. dos; BUENO, R. C. O. de F; BUENO, A. de F.; VIEIRA, S. S.
Fonte: Ecossistema, Espírito Santo do Pinhal, v. 34/35, n. 1/2, jan./dez. 2009/2010. Publicador: Ecossistema, Espírito Santo do Pinhal, v. 34/35, n. 1/2, jan./dez. 2009/2010.
Tipo: Artigo em periódico indexado (ALICE)
EN
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Controle da larva alfinete, Diabrotica speciosa (Coleoptera: chrysomelidade). RESUMO: Pragas de solo como a larva alfinete, diabrotica speciosa, são de grande importância na cultura de milho, principalmente no sistema de plantio direto. A larva alfinete tem sido normalmente controlada com o uso de inseticidas. Clorpirifós aplicado no sulco de plantio tem registro para a cultura do milho e pode ser uma alternativa ao tratamento de semente para o controle desta praga. Durante os anos de 1994 a 1997 sete ensaios foram conduzidos no sul do Brasil para avaliar a eficiência de diversos inseticidas no controle da larva alfinete. Os resultados observados mostraram que clorpirifós em aplicação no sulco de plantio foi o inseticida mais eficiente no controle da larva alfinete, D. speciosa. ABSTRACT: Soil pests such as the corn rootworm, Diabrotica speciosa, have damaged corn crops mainly at regions where the no-tillage crop management is largely adopted. Corn rootworm has been always a problem for corn producers who had largely relied on pesticides to keep outbreaks under control. Chlorpyrifos in furrow application is registered for maize and might be an alternative to seed treatment to control this pest. From 1994 to 1997 seven trials were carried out at south of Brazil to evaluate insecticides on D. speciosa control. Chlorpyrifos...

Insect pests in mixed cultivation systems.

PAMPLONA, A. M. S. R.; ANDREAZZE, R.
Fonte: In: SHIFT WORKSHOP, 2., 1995, Cuiaba. Summaries of lectures and posters... Cuiaba: UFMT, 1995. Publicador: In: SHIFT WORKSHOP, 2., 1995, Cuiaba. Summaries of lectures and posters... Cuiaba: UFMT, 1995.
Tipo: Resumo em anais de congresso (ALICE) Formato: p. 158.
EN
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Insect pests affecting the various species in the SHIFT experimental plantation are currently being observed and collected. The poster presents, among others, several new pests of the useful plants not hitherto reported in the literature, e.g., the leaf-rolling beetle, Hybolabus amazonicus Voss (Coleoptera, Attelabidae), in Brazil. Leaf-sticking "caterpillars" (Lepidoptera, Stenomidae) in citrus and cupuassu. Root borer (not yet identified) in mahogany. Leaf-footed bugs, Crinocerus sanctus (Fabr.) (Hemiptera, Coreidae), and the butterfly Sibine nesea (Stoll in Cramer) (Lepidoptera, Limacodidae) have been observed as pests on orange trees in the region for the first time. Pest control measures and options are discussed.; 1995

Status of white pine blister rust control on January 1, 1939

United States -- Division of Plant Disease Control; United States -- Bureau of Entomology and Plant Quarantine
Fonte: United States Department of Agriculture, Bureau of Entomology and Plant Quarantine; United States Department of Agriculture, Bureau of Entomology and Plant Quarantine ( Washington, D.C. ) Publicador: United States Department of Agriculture, Bureau of Entomology and Plant Quarantine; United States Department of Agriculture, Bureau of Entomology and Plant Quarantine ( Washington, D.C. )
Tipo: Artigo de Revista Científica Formato: 12 p., 6 leaves of plates, maps ; 26 cm.
Publicado em //1939 ENGLISH
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Caption title.; Typescript.; "E-471 ; April 1939."; (Statement of Responsibility) prepared by the Division of Plant Disease Control.

Effects of postharvest oils on arthropod pests of citrus / by Peter Taverner

Taverner, Peter
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado Formato: 573386 bytes; application/pdf
Publicado em //1999 EN
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This study investigates the effects of a number of petroleum and vegetable oils against citrus pests.; Thesis (Ph.D.)--University of Adelaide, Dept. of Applied and Molecular Ecology, 2000; Bibliography: leaves 204-211.; v, 211 leaves : ill. (chiefly col.) ; 30 cm.; Title page, contents and abstract only. The complete thesis in print form is available from the University Library.

Toward routine, DNA-based detection methods for marine pests

Bott, N.; Keller, K.; Sierp, M.; Herdina, M.; Rowling, K.; McKay, A.; Loo, M.; Tanner, J.; Deveney, M.
Fonte: Pergamon-Elsevier Science Ltd Publicador: Pergamon-Elsevier Science Ltd
Tipo: Artigo de Revista Científica
Publicado em //2010 EN
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35.75%
Marine pest incursions can cause significant ongoing damage to aquaculture, biodiversity, fisheries habitat, infrastructure and social amenity. They represent a significant and ongoing economic burden. Marine pests can be introduced by several vectors including aquaculture, aquarium trading, commercial shipping, fishing, floating debris, mining activities and recreational boating. Despite the inherent risks, there is currently relatively little routine surveillance of marine pest species conducted in the majority of countries worldwide. Accurate and rapid identification of marine pest species is central to early detection and management. Traditional techniques (e.g. physical sampling and sorting), have limitations, which has motivated some progress towards the development of molecular diagnostic tools. This review provides a brief account of the techniques traditionally used for detection and describes developments in molecular-based methods for the detection and surveillance of marine pest species. Recent advances provide a platform for the development of practical, specific, sensitive and rapid diagnosis and surveillance tools for marine pests for use in effective prevention and control strategies.; Nathan J. Bott, Kathy M. Ophel-Keller...

Governance of Communicable Disease Control Services : A Case Study and Lessons from India

Das Gupta, Monica; Khaleghian, Peyvand; Sarwal, Rakesh
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Publications & Research :: Policy Research Working Paper; Publications & Research
ENGLISH; EN_US
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The authors study the impact of governance and administrative factors on communicable disease prevention in the Indian state of Karnataka using survey data from administrators, frontline workers, and elected local representatives. They identify a number of key constraints to the effective management of disease control in India, in misaligned incentives, and the institutional arrangements for service delivery. The authors discuss these under five headings: administrative issues; human resource management; horizontal coordination; decentralization, community involvement, and public accountability; and implementation of public health laws and regulations. They find that India's public health system is configured to be highly effective at top-down reactive work, such as bringing disease outbreaks under control, but not for the more routine collaborations required for proactive disease prevention. The authors conclude with policy recommendations that take into account the complexity of India's system of public administration and the need for simple reforms that can be easily implemented.

On the safe of pesticides in controlling the terrestrial mollusc pests

Panigrahi,A.; Raut,S. K.
Fonte: Instituto Oswaldo Cruz, Ministério da Saúde Publicador: Instituto Oswaldo Cruz, Ministério da Saúde
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/1993 EN
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The preferred food items of the slugs Laevicaulis alte and the snails Achatina fulica were used to prepare 'poison baits'by injecting the pesticides 'Rogor'and 'Nuvan'to kill these mollusc pests. The 'poison baits'prepared with Thrichosanthes dioica and Lycopersicum esculentum were accepted by 100% individuals of both the species irrespective of the pesticides used. In all cases the slug and the snail individuals died within a considerable length of time following consuption of the bait. The importance of using 'poison bait'lies not only with the sure success in killing the pests but also with the 'safe use'of toxic materials in order to avoid environmental hazards.

Plant compounds insecticide activity against Coleoptera pests of stored products

Moreira,Márcio Dionizio; Picanço,Marcelo Coutinho; Barbosa,Luiz Cláudio de Almeida; Guedes,Raul Narciso Carvalho; Campos,Mateus Ribeiro de; Silva,Gerson Adriano; Martins,Júlio Cláudio
Fonte: Embrapa Informação Tecnológica; Pesquisa Agropecuária Brasileira Publicador: Embrapa Informação Tecnológica; Pesquisa Agropecuária Brasileira
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/07/2007 EN
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The objective of this work was to screen plants with insecticide activity, in order to isolate, identify and assess the bioactivity of insecticide compounds present in these plants, against Coleoptera pests of stored products: Oryzaephilus surinamensis L. (Silvanidae), Rhyzopertha dominica F. (Bostrichidae) and Sitophilus zeamais Mots. (Curculionidae). The plant species used were: basil (Ocimum selloi Benth.), rue (Ruta graveolens L.), lion's ear (Leonotis nepetifolia (L.) R.Br.), jimson weed (Datura stramonium L.), baleeira herb (Cordia verbenacea L.), mint (Mentha piperita L.), wild balsam apple (Mormodica charantia L.), and billy goat weed or mentrasto (Ageratum conyzoides L.). The insecticide activity of hexane and ethanol extracts from those plants on R. dominica was evaluated. Among them, only hexane extract of A. conyzoides showed insecticide activity; the hexane extract of this species was successively fractionated by silica gel column chromatography, for isolation and purification of the active compounds. Compounds 5,6,7,8,3',4',5'-heptamethoxyflavone; 5,6,7,8,3'-pentamethoxy-4',5'-methilenedioxyflavone and coumarin were identified. However, only coumarin showed insecticide activity against three insect pests (LD50 from 2.72 to 39.71 mg g-1 a.i.). The increasing order of insects susceptibility to coumarin was R. dominica...

Plant compounds insecticide activity against Coleoptera pests of stored products

MOREIRA, M.D.; PICANÇO, M.C.; BARBOSA, L.C. de A.; GUEDES, R.N.C.; CAMPOS, M.R. de; SILVA, G.A.; MARTINS, J.C.
Fonte: Pesquisa Agropecuária Brasileira, Brasília, v. 42, n.7, p. 909-915, jul. 2007 Publicador: Pesquisa Agropecuária Brasileira, Brasília, v. 42, n.7, p. 909-915, jul. 2007
Tipo: Artigo em periódico indexado (ALICE)
EN
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35.7%
The objective of this work was to screen plants with insecticide activity, in order to isolate, identify and assess the bioactivity of insecticide compounds present in these plants, against Coleoptera pests of stored products: Oryzaephilus surinamensis L. (Silvanidae), Rhyzopertha dominica F. (Bostrichidae) and Sitophilus zeamais Mots. (Curculionidae). The plant species used were: basil (Ocimum selloi Benth.), rue (Ruta graveolens L.), lion's ear (Leonotis nepetifolia (L.) R.Br.), jimson weed (Datura stramonium L.), baleeira herb (Cordia verbenacea L.), mint (Mentha piperita L.), wild balsam apple (Mormodica charantia L.), and billy goat weed or mentrasto (Ageratum conyzoides L.). The insecticide activity of hexane and ethanol extracts from those plants on R. dominica was evaluated. Among them, only hexane extract of A. conyzoides showed insecticide activity; the hexane extract of this species was successively fractionated by silica gel column chromatography, for isolation and purification of the active compounds. Compounds 5,6,7,8,3',4',5'-heptamethoxyflavone; 5,6,7,8,3'-pentamethoxy-4',5'-methilenedioxyflavone and coumarin were identified. However, only coumarin showed insecticide activity against three insect pests (LD50 from 2.72 to 39.71 mg g-1 a.i.). The increasing order of insects susceptibility to coumarin was R. dominica...

Insecticide effects of Ruta graveolens, Copaifera langsdorffii and Chenopodium ambrosioides against pests and natural enemies in commercial tomato plantation

Barbosa,Flávia Silva; Leite,Germano Leão Demolin; Alves,Sérgio Monteze; Nascimento,Aline Fonseca; D'Ávila,Vinícius de Abreu; Costa,Cândido Alves da
Fonte: Editora da Universidade Estadual de Maringá - EDUEM Publicador: Editora da Universidade Estadual de Maringá - EDUEM
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2011 EN
Relevância na Pesquisa
35.8%
The aim of this study was to evaluate the insecticide effect of watery leaf extracts of Ruta graveolens (Rutaceae), alcoholic leaf extracts of Copaifera langsdorffii (Caesalpinaceae) and Chenopodium ambrosioides (Chenopodiaceae) in the concentration of 5% under field conditions. The experiment design was randomized blocks with six replications. The parcels treated with plant extracts showed reduction in the population of pests when compared with the control parcels. The extract elaborated with C. langsdorffii presented greater insecticidal effect under Bemisia tabaci (Hemiptera: Aleyrodidae) and sum of pests. It was verified that after 24 hours of spraying, the parcels treated with the extract of C. ambrosioides presented minor numbers of adults of Tuta absoluta (Lepidoptera: Gelechiidae), followed by the parcels treated with extract of R. graveolens. There were smaller numbers of parasitoid eggs of lepidopterans Trichogramma sp. (Hymenoptera: Trichogrammatidae) and sum of natural enemies (predators + parasitoids) in the parcels that had received spraying with extracts from the plants of C. langsdorffii and C. ambrosioides, followed by R. graveolens, compared to the control. There were a smaller number of parasitoids from the family Eulophidae (Hymenoptera) attacking caterpillars of T. absoluta in plants treated with R. graveolens...

Control of Pseudoplusia includens (Walker, 1857) in the soybean culture with different insecticides

Pinto Junior, Airton Rodrigues; Kozlowski, Luiz Alberto; da Silva, André Luís Lopes
Fonte: Journal of Biotechnology and Biodiversity Publicador: Journal of Biotechnology and Biodiversity
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; Formato: application/pdf
Publicado em 19/01/2012 POR
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The aim of this research was to test the efficacy of different insecticides, and dosage against Pseudoplusia includens in the soybean culture. The treatments were: (1) alphacypermethrin + teflubenzuron, (2) teflubenzuron, (3) diflubenzuron and (4) profenophos + lufenuron, in different doses. All the insecticides tested in this research presented high efficacy on the control of Pseudoplusia includens in the soybean culture. These insecticides and dosages were: (1) mixture of alphacypermethrin and teflubenzuron at dosages from 9.0 to 11.25 g a.i.ha-1, (2) teflubenzuron at dosage from 6 to 12 g a.i.ha-1, (3) diflubenzuron at dosage from 10 to 20 g a.i.ha-1 and (4) the mixture profenophos and lufenuron at dosage 75.0 and 7.5 g a.i.ha-1, respectively. All these insecticides after 15 days of application promote 100% dead caterpillars. None these insecticides decrease soybean yield. Key-words: Glycine max., soybean looper, pesticides, lepidoptera, pests