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| Registros recuperados: 243 | |
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| Sato,Mário E.; Silva,Marcos Z. da; Raga,Adalton; Souza Filho,Miguel F. de. |
| Studies on artificial laboratory selections with abamectin, cross-resistance relationships, and stability of resistance were carried out with Tetranychus urticae Koch to provide basic information for an abamectin resistance management program. Selections for resistance and susceptibility to abamectin were performed in a population of T. urticae, collected from a commercial strawberry field in the State of São Paulo, Brazil. After five selections for resistance and five selections for susceptibility, susceptible (S) and resistant (R) strains of T. urticae to abamectin were obtained. The resistance ratio (R/S) at the LC50 reached 342-fold values. The toxicity of eight acaricides was evaluated in the R and S strains, observing significant differences (at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Two-spotted spider mite; Resistance management; Chemical control. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000600016 |
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| Souza,Wando Wilson de Oliveira; Oliveira,Alexandre Bosco de; Dutra,Alek Sandro; Nunes,Renato Leandro Costa; Cavalcante,Robson Assunção. |
| ABSTRACT Cultivation of the cowpea is important in various regions of Brazil, but competition from weeds is one of the factors which limit productivity. The aim of this study therefore was to evaluate the pre-plant selectivity and efficiency of different herbicides, and combinations of herbicides, in the cowpea [Vigna unguiculata (L.) Walp.]. An experiment was carried out in a randomised block design, in lots split over time and with three replications, using a 4 x 7 factorial scheme, where the treatments consisted of: glyphosate, glyphosate + imazethapyr, glyphosate + flumioxazin, glyphosate + imazethapyr + flumioxazin, glyphosate + ready mix (imazethapyr & flumioxazin), and two control treatments (one with no weeding and one with manual weeding). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vigna unguiculata (L.) Walp; Chemical control; Competition from weeds. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000400675 |
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| KARAM, D.; SILVA, W. T. da; RIOS, J. N. G.; FERNANDES, R. C.. |
| A necessidade de uma maior produção de alimentos seguros para atender o crescimento da população mundial induziu o uso constante de produtos agrotóxicos para um aumento na produção e na produtividade agrícola. Sabe-se que a utilização indiscriminada desses produtos desencadeia processos de contaminação, com consequências muitas vezes irreversíveis. Tal fato tem demandado ações de mitigação e racionalização do emprego desses compostos. Para contribuir com o entendimento do tema “agrotóxicos”, este documento traz esclarecimentos da legislação, da classificação, considerando o alvo de atuação (plantas, insetos ou microrganismos), do grupo químico, e ainda conforme a sua toxicidade aos seres humanos e periculosidade ambiental. Apresenta também os cuidados a... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Controle químico; Defensivo; Toxidez; Chemical control. |
| Ano: 2015 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1039789 |
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| Raetano,Carlos Gilberto; Kobayashi,Marco Roberto; Kuwahara,Wagner Roberto; Vinchi,Rodrigo R.. |
| Thrips is one of the most important vector species of the tomato spotted wilt tospovirus (TSWV) in Brazil. Two different pesticide application methods, drench x spray, using thiamethoxam were compared with commonly used insecticides for thrips control in tomato plants, Debora Plus. The experimental design consisted of a complete randomized block design with seven treatments and four replicates. Dosages of 150 and 200 g of a.i. per ha were used in just one drench application and 50 g of a.i. ha-1 sprayed, at weekly intervals, 48 days after sowing. The control efficacy of thiamethoxam was compared to diafenthiuron (400 g of a.i. ha-1), profenofos + cypermethrin (320+32 g of a.i. ha-1, respectively) and methamidophos (60 g of a.i. per hectolitre of water) in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon esculentum; Frankliniella schultzei; Drench application; Spraying; Chemical control. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362003000300002 |
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| Godoy,Cláudia Vieira; Seixas,Claudine Dinali Santos; Soares,Rafael Moreira; Marcelino-Guimarães,Franscismar Correa; Meyer,Maurício Conrado; Costamilan,Leila Maria. |
| Abstract: Asian soybean rust, caused by the fungus Phakopsora pachyrhizi, is the most severe disease of the crop and can cause yield losses of up to 90%. The disease was first reported in Brazil in 2001. Epidemics of the disease are common in the country, where the fungus can survive year-round. Regulatory measures to reduce the inoculum between seasons and avoid late-season soybean have been adopted to manage the disease. Disease control has relied mainly on chemical control, but a lower sensibility of the fungus to fungicides has been reported in Brazil. Major-resistance genes have been mapped and incorporated into the cultivars. With the reduced efficacy of the fungicides, the adoption of integrated measures to control the disease will be important for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Phakopsora pachyrhizi; Biotechnology; Chemical control; Genetic resistance; Losses; Management.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000500407 |
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| CID, L. P. B.; TRINDADE, D. R.; CONCEICAO, H. E. O.. |
| Para o controle do mal-das-folhas, recomenda-se, preliminarmente, para as condições de Manaus e áreas similares, uso de fungicidas, aplicados alternadamente a cada dez dias, durante a época de maior pluviosidade, e, a cada 15 dias, durante o período de estiagem. Recomenda-se, também, o uso de espalhante adesivo. Foi feito estudo sobre o efeito ecológico da aplicação em nível de veveiro. |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Hevea spp; Doença da folha; Mal-das-folhas; Brasil; Amazonas; Rubber tree; Leaf fungal diseases; South American leaf blight; SALB; Nursery.; Controle Químico; Fungo; Fungicida; Microcyclus Ulei; Poluição; Seringueira; Viveiro.; Fungicides; Chemical control; Pollution.. |
| Ano: 1981 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/665056 |
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| Furiatti,Rui S.; Pereira,Paulo R.V.S.; Pinto Jr.,Airton R.; Lazzari,Flávio A.. |
| The efficiency of insecticides against Sitophilus oryzae (Linnaeus, 1763) (Coleoptera, Curculionidae) and Rhyzopertha dominica (Fabricius, 1792) (Coleoptera, Bostrichidae) was determined exposing them to treated wheat in laboratory. Each plot, which was composed by 1.2 kg of wheat grain, was treated with 5 ml of the concentration/kg of wheat using a propelling air atomizer. Fifteen days after treatment 50 g samples of the grain were taken, from each plot, placed in plastic jars into which 10 adult insects of each species were released. This was repeated every 30 days until 165 days after treatment. The number of dead insects was counted 15 days after each infestation thus the evaluations were made at 30, 60, 90, 120, 150 and 180 days after the insecticide... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Chemical control; Stored-product pests. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000100018 |
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| Registros recuperados: 243 | |
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