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| Registros recuperados: 20 | |
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| Ventura,Maurício Ursi; Ito,Márcio. |
| Studies were carried out to determine the antifeedant activity of extracts of leaves, stems, flowers and fruits of Melia azedarach (L.), the dosage activity responses to the most active extract and the effects of sunlight in the activity persistence to Diabrotica speciosa (Genn.) beetles. Extracts efficiency was determined by evaluating leaf consumption. Insect feeding was deterred by stems, fruits and flowers extracts. Flowers and fruits extracts were the most efficient. Stems extract was in an intermediate position between the two most efficient and the least one (leaf extracts). The most active extract (flowers) was sprayed at concentrations of 0, 1, 2, 3, 4, 5, 6 and 7 g/100 ml. Feeding of D. speciosa on common bean leaves extracts decreased... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Leaf beetle; Phaeolus vulgaris (L.); Deterrence; Botanical insecticide. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000200011 |
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| Nonino,Mariana Campana; Pasini,Amarildo; Ventura,Maurício Ursi. |
| Doru luteipes consome lagartas de Spodoptera frugiperda, que é atualmente a principal praga da cultura do milho no Brasil. Normalmente, se 70% das plantas tivessem o predador, a praga seria mantida abaixo do nível de dano econômico. Entretanto, o predador ocorre após a praga danificar as plantas. Assim, a disponibilidade de materiais que atraíssem e antecipassem a presença do predador na lavoura poderia reduzir populações da praga. Desta forma, estudou-se em laboratório a atratividade de dietas artificiais para machos e fêmeas do predador D. luteipes. Os tratamentos foram: pupa desidratada e moída do bicho-da-seda; pólen misto, nas quantidades de 0,05; 0,1; 0,2; 0,5 e 1,0g para ambas as dietas. Em olfatômetro, os estímulos da dieta foram comparados à... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spodoptera frugiperda; Zea Mays; Controle biológico e dermaptera. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000300004 |
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| Silva,Flávia Cloclet da; Ventura,Maurício Ursi; Morales,Lauro. |
| Traps lured with semiochemical have been proposed to manage the coffee berry borer, coffee planting is however made under several environmental conditions that may affect the efficacy of traps. Several trap designs and variations were proposed and, therefore, a series of field experiments was carried out to capture coffee berry bores in traps disposed in a low density coffee plantations in the Northern part of the State of Paraná, Brazil. Traps were composed of plastic bottles (2 L) with a window (13 × 18 cm). Ethanol (E), Methanol (M) and coffee oil alone did not improve the capture when transparent traps with a 2 mm hole in the vial dispenser were used; traps lured with E : M mixtures (1:1, 1:2, 1:3) caught similar and higher number of insects than the... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Semiochemical; Attractant; Volatile; Trap color. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000600010 |
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| Mikami,Adriana Yatie; Pissinati,Aline; Fagotti,Dáfila; Menezes Júnior,Ayres de Oliveira; Ventura,Maurício Ursi. |
| The Mexican bean weevil Zabrotes subfasciatus (Coleoptera: Chrysomelidae: Bruchinae) is an important pest of stored beans in tropical regions. The efficiency of kaolin [with or without neem (Azadirachta indica) oil] and diatomaceous earth (DE) (standard treatment) was studied in laboratory aiming to obtain alternatives for chemical control of this insect. Insects were confined in plastic vials containing beans treated with kaolin (2, 4 and 8g kg-1), kaolin + neem [2g kg-1(5% neem oil)], diatomaceous earth (1g kg-1) and control. Mortality of adult insects, number of eggs and F1generation beetles emergency were assessed. Kaolin caused mortality of Z. subfasciatus, however higher periods and doses than DE were necessary to promote high mortality (100% or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bruchids; Inert dusts; Phaseolus vulgaris. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000700003 |
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| Arruda,Iara Cintra; Ventura,Maurício Ursi; Scarminio,Ieda Spacino. |
| The objective of this work was to evaluate arrestant and stimulant feeding effects on Diabrotica speciosa (Ger.), using cucurbitacin-content starch-based formulations prepared with varying starch sources, and adding potassium lignate. In a glass slide assay, the wash off resistance of formulations was compared. Potassium lignate did not improve wash off resistance. Lagenaria vulgaris L. powder, in which cucurbitacin B concentration was determined as 0.28%, was added to the most adhesive formulation. The resultant material was used in a two-choice assay in which leaves of common bean, Phaseolus vulgaris L., treated with concentrations of 2.5%, 5%, 10%, 15% and 20% were offered to insects together with untreated control leaves. Greater number of insects and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Coleoptera; Bait; Semiochemical; Rootworm. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000700003 |
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| Menezes Jr.,Ayres Oliveira; Mikami,Adriana Yatie; Ide,André Keiiti; Ventura,Maurício Ursi. |
| Host plant feeding preference is important basic information for the development of insect management strategies. Multiple-choice feeding preference assays were conducted in the laboratory for the chrysomelid beetle, Microtheca punctigera (Achard). Feeding was assessed 72 h after onset of experiments. With one larva per Petri dish, food items comprised watercress, Nasturtium officinale L., arugula, Eruca sativa L., mustard, Brassica juncea Cosson, Chinese cabbage, B. pekinensis (Lour.) Rupr. and wild radish (Raphanus raphanistrum L.). Feeding ranking preferences were Chinese cabbage, mustard, wild radish, arugula and watercress (7.97, 1.85, 0.98, 0.36 and 0.11 mm², respectively). Feeding on Chinese cabbage was 4.31 times more intense than on mustard. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassicaceae; Insecta; Host plants; Consumption. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000100014 |
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| Ventura,Maurício Ursi; Panizzi,Antônio Ricardo. |
| The external morphology of the sensilla, including pores and permeable points on the cuticle of the antennae of adults of Neomegalotomus parvus (West.) (Heteroptera: Alydidae) was investigated with regard to their olfactory function. Behavioural evidence of olfaction, the importance of the different antennal segments in locating the host under still-air, and the responses of the insects to plants' scents and to pheromones in wind assays were also studied. With the scanning electronic microscope mechanoreceptor sensilla were found on the four segments of the antennae of N. parvus. The density of the sensilla was greater on the 4th segment. On the apical segment, sensilla with olfactory morphological traits were observed. Bugs with intact antennae located... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sensilla; Host plant; Behaviour; Antenna. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000500012 |
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| Ventura,Maurício Ursi; Panizzi,Antônio Ricardo. |
| Interactions between Neomegalotomus parvus (Westwood) (Coreoidea: Heteroptera: Alydidae) and host plants were investigated including population monitoring throughout the year, gregarious behavior in the field, and oviposition preference among host plants and one non-host plant in field cages. Cowpea, Vigna unguiculata (L.) Walp., soybean, Glycine max (L.) Mill. cv. BR 37, pigeon pea, Cajanus cajan (L.) Mill., pigeon pea cv. Anão, and lablab, Dolichos lablab L. were monitored in the field. N. parvus was found on host plants during 11 months. The shortest period of occurrence was observed on soybean and the longest on lablab. Insects were found mostly on mature pods. Contagious distribution (negative bionomial) was detected, characterizing the aggregation.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hemiptera; Alydidae; Host plants; Phenology; Oviposition. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000100006 |
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| Ventura,Maurício Ursi; Gomes,Marcos Roberto. |
| Population studies of D. speciosa on fall / winter crops were conducted. Larvae were monitored on maize (Zea mays L.), wheat (Triticum aestivum L.) and black oats (Avena strigosa Schreb.) and beetles on soybeans (Glycine max (L.) Mill., maize, common beans (Phaseolus vulgaris L.), wheat and black oats from March 23, 2001 to August 24, 2001. Soybean, maize, common beans, wheat and oats were sown on December 28, 2000; February 9, 2001; March 2, 2001; April 26, 2001 and May 11, 2001, respectively. Maize and common beans were grown on latter growing season. Adult beetles of D. speciosa were collected throughout the sampling period. Greatest beetles population peak occurred on wheat in August 3, 2001 which coincided with flowering period. Population dynamics of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Host plants; Phenology; Latter growing season; Samples. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000600042 |
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| Marques,Francisco de Assis; Wendler,Edison Perevalo; Macedo,Alexandra; Wosch,Celso Luiz; Maia,Beatriz Helena Sales; Mikami,Adriana Yatie; Arruda-Gatti,Iara Cintra; Pissinati,Aline; Mingotte,Fábio Luiz Checchio; Alves,Amilton; Ventura,Maurício Ursi. |
| Several synthetic and commercial analogs of 1,4-dimethoxybenzene, a kairomone of Diabrotica speciosa, along with other compounds already shown to be attractive to other species of Diabrotica, were tested as attractant to D. speciosa. Yellow cup traps were lured with the compounds and installed in a common bean field. Assessments were conducted 24 h later. 1,4-dimethoxybenzene lured traps caught significantly more beetles than the control traps. Captures of traps lured with 1,4-dimethoxybenzene analogs did not differ from the control traps. Results showed that position and nature of the substituents on the aromatic ring played a crucial role in the activity of the natural compound. The aromatic ring was also very important to the activity of the kairomone. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diabrotica speciosa 1; 4-dimethoxybenzene analogs kairomone parakairomone field test. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600003 |
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| Ronque,Edson Roberto Vaz; Ventura,Maurício Ursi; Soares Júnior,Dimas; Macedo,Rogério Barbosa; Campos,Bruce Roberto Scheidl. |
| Avaliou-se a viabilidade da exploração do morangueiro, no Paraná, em duas áreas, 0,3 ha (área média cultivada pela agricultura familiar) e 1 ha, por um ano. Elaborou-se uma planilha de fluxo de caixa a partir da qual se calcularam: Período de Recuperação do Capital (PRC), Retorno sobre Investimento (RI), Valor Presente Líquido (VPL) e Taxa Interna de Retorno (TIR). Todos para Custo Operacional Efetivo (COE), Custo Operacional Total (COT) e Custo Total de Produção (CTP). Para uma situação considerada normal, os indicadores de rentabilidade calculados foram (Tipo de custo: VPL área-padrão (TIR área- padrão) / VPL área efetiva (TIR área efetiva)) COE: US$ 17.856,55 (42%) / US$ 4.795,85 (39%); COT: US$ 5.182,40 (11%) / - US$ 1.691,97 (-13%); CPT: US$ 4.846,26... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Análise econômica da cultura de morango; Análise de sensibilidade; Produção de morango. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452013000400014 |
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| Registros recuperados: 20 | |
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