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Search Results: 1 - 10 of 68 matches for " Josemar;Ringenberg "
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Desenvolvimento e exigências térmicas de Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) em ovos de Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae)
Fonseca, Fabiana L. da;Kovaleski, Adalecio;Foresti, Josemar;Ringenberg, Rudiney;
Neotropical Entomology , 2005, DOI: 10.1590/S1519-566X2005000600011
Abstract: the aim of this study was to evaluate the development of trichogramma pretiosum riley on eggs of bonagota cranaodes (meyrick) under different temperatures. b. cranaodes eggs were maintained under seven constant temperatures (14, 18, 20, 22, 25, 28 and 30oc), 70 ± 10% r.h. and, 14 h l. forty replicates with 20 parasitized eggs each were kept in glass tubes (8.5 x 2.5 cm) covered with a plastic film. the method of hyperbole was used to calculate the temperature threshold (tb) and the thermal constant (k). the tb obtained was 11.9oc and to thermal constant was 153,4 dd. the most favorable temperature range was from 25oc to 30oc, at which the shortest egg-adult development period and the highest survivorship were observed.
Adequa??o de uma dieta artificial para a cria??o de Spodoptera cosmioides (Walk.) (Lepidoptera: Noctuidae) em laboratório
Bavaresco, Alvimar;Garcia, Mauro S.;Grützmacher, Anderson D.;Ringenberg, Rudiney;Foresti, Josemar;
Neotropical Entomology , 2004, DOI: 10.1590/S1519-566X2004000200005
Abstract: the biology of spodoptera cosmioides (walk.) was studied on three artificial diets with different protein sources (d1 = white bean, yeast extract, soybean flour, powder milk and wheat germ; d2 = 'carioca' bean and yeast extract; d3 = corn flour, wheat germ and yeast extract). the objective of this research was to determine the most suitable diet for mass rearing s. cosmioides in laboratory. the species is highly polyphagous, and for this reason we hypothesized that diets that are suitable for other lepidoptera can allow its development and fulfill the minimum requirements of biological quality, quantity and economy. although s. cosmioides has completed the biological cycle on the three diets, the d1 was the most suitable for its rearing and produced the fastest development, higher total survival and pupae weight, as well as higher net reproduction rate (ro), intrinsic rate of natural increase (rm) and finite rate of natural increase (l). the number of instars varied from six to seven, predominating six in d1 and d3; in d2, half the population presented six instars and half seven. females presented pupae duration significantly lower that the males in all diets, thus emerging earlier. adult longevity was not affected by the diets, while total fecundity was higher in d1 and d2. in conclusion, the diet 1 is recommended to mass rearing s. cosmioides in the laboratory.
Biologia e exigências térmicas de Spodoptera cosmioides (Walk.) (Lepidoptera: Noctuidae)
Neotropical Entomology , 2002, DOI: 10.1590/S1519-566X2002000100007
Abstract: the biology of spodoptera cosmioides (walk.) was studied under different temperatures and its thermal requirements were determined, aiming to aid the rearing of this insect in the laboratory. embryonic and post-embryonic periods were evaluated at seven different temperatures (14, 18, 22, 25, 28, 30 and 32oc) under environmental chamber conditions, with 14h photophase. the caterpillars were reared on an artificial diet containing white bean, soybean meal, yeast extract, wheat germ and powder milk as source of protein. the extent of the embryonic period decreased with the increase of temperature within the 14oc to 25oc temperature range, remaining constant between 28oc and 32oc. for the other phases (caterpillar, pre-pupa and pupa) an inverse relationship between temperature and duration was observed within the 14oc to 30oc temperature range, extending to 32°c for pupae. duration of pupal phase for males was larger than for females resulting in asynchronous adult emergence. the temperature thresholds for the embryonic, larval, pre-pupal, pupal periods and total cycle were 9.34oc, 11.65oc, 9.65oc, 11.08oc and 11.23oc, with thermal constants of 62,73 degree-days (dd), 254.61dd, 33.42dd, 177.55dd and 525.11dd, respectively. evaluating the pupal phase alone, the threshold temperatures were 11.25oc for males and 10.81oc for females, with thermal constants of 188.26dd for males and 165.47dd for females. for total cycle, the threshold temperature and the thermal constant for males were 11.28oc and 535.85dd, whereas for females the same variables had values of 11.15oc and 513.17dd. so, the most adequate temperature for the development of s. cosmioides is within the range of 25oc and 28oc, where 9.6 to 11.7 generations of the insect can be annually obtained, in laboratory conditions.
Biologia comparada de Spodoptera cosmioides (Walk.) (Lepidoptera: Noctuidae) em cebola, mamona, soja e feij?o
Bavaresco, Alvimar;Garcia, Mauro Silveira;Grützmacher, Anderson Dionei;Foresti, Josemar;Ringenberg, Rudiney;
Ciência Rural , 2003, DOI: 10.1590/S0103-84782003000600001
Abstract: the biology of spodoptera cosmioides (walk.) was studied on four natural hosts (onion leaves, castor oil plant, soy cv. embrapa 48 and bean cv. carioca). the duration and viability of immature phases and total cycle, instar number, pupals weight, sexual ratio, percentage of deformed adults and adults not released of pupal beg, adults' longevity, fecundity and eggs viability were evaluated. it was observed in castor oil plant and onion shorter duration and larger viability of total cycle (39.7 days and 21.7%; 40.5 days and 21.8%, respectively), in contrast of soy (46.0 days and 3.9%). the pupal weight was 444.6 mg on onion, 420.0mg on bean, 396.6mg on castor oil plant and 298.7 mg on soy. onion and castor oil plant leaves had a predominance of six larval instars, also happening seven for some of them, while in soy the occurrence of seven prevailed, also happening eight instars, indicating less nutritional adaptation of this host. the females had pupal phase significantly smaller than the males in all the hosts, making adults emergency happen before the males. in onion, the longevity of the adults was significantly superior comparing with the other hosts. the fecundity was better on onion and castor oil plant (3224 and 3206 eggs/female, respectively), therefore on soy was observed 1353 eggs/female. in bean leaves, the development of the insect was harmed by morphologic characters, which promoted high mortality in the larval phase.
Exame de ressonancia sobre "paciência" e desenvolvimento local endógeno em subsolo teológico
Maciel, Josemar de Campos;
Intera??es (Campo Grande) , 2008, DOI: 10.1590/S1518-70122008000100010
Abstract: this text joins the concept of "patience" with some aspects of endogenous local development, with special attention to the metaphoric world originated in theological language, one of the first and main historical matrixes of the imaginary of development. the proposition advanced is that the local development agent is a mediator between the times of the community (collective dimension) and that of the individual (private dimension). this idea is prepared by a previous reflection about the tension between social theory and the theological dimension of culture, and is followed by two illustrations of the task of the local development agent: the notion of diagnostics and that of sin.
Controle químico da forma galícola da filoxera Daktulosphaira vitifoliae (Fitch, 1856) (Hemiptera: Phylloxeridae) na cultura da videira
Botton, Marcos;Ringenberg, Rudiney;Zanardi, Odimar Zanuzo;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000500002
Abstract: grape phylloxera daktulosphaira vitifoliae (fitch, 1856) (hemiptera: phylloxeridae) is the main grape pest. adults and nymphs feeds on leaves and roots but major damage is observed on roots of own rooted vitis vinifera. damage on leaves is important in root stock nurseries where chemical control is necessary. this study was conducted to evaluate insecticides to control the leaf form in a paulsen 1103 nursery in field condictions. imidacloprid (provado 200 sc, 40ml 100l-1) and thiamethoxam (actara 250 wg, 30g 100l-1) reduced foliar damage in more than 90%, providing better control than deltamethrin (decis 25 ce, 40ml 100l-1) and fenitrothion (sumithion 500 ce, 150ml 100l-1) current standarts for pest control. acephate (orthene 750 br, 100g 100l-1) and abamectin (vertimec 18 ce, 80ml 100l-1) were not efficient.
Controle químico da forma galícola da filoxera Daktulosphaira vitifoliae (Fitch, 1856) (Hemiptera: Phylloxeridae) na cultura da videira
Botton Marcos,Ringenberg Rudiney,Zanardi Odimar Zanuzo
Ciência Rural , 2004,
Abstract: A filoxera Daktulosphaira vitifoliae (Fitch, 1856) (Hemiptera: Phylloxeridae) é considerada a principal praga da videira. O inseto se alimenta da parte aérea e raízes sendo que os maiores prejuízos s o observados em raízes de Vitis vinifera cultivada como pé-franco. O dano nas folhas é importante em viveiros, quando o ataque ocorre nos ramos utilizados como porta-enxertos, resistentes à forma radícola. Este trabalho foi realizado com o objetivo de selecionar inseticidas que possam ser empregados como substitutos aos fosforados e piretróides no manejo da forma galícola da filoxera. Os inseticidas imidacloprid, thiamethoxam, acephate, abamectin, deltamethrin e fenitrothion, foram avaliados em condi es de campo, sob infesta o natural, em plantas matrizes do porta-enxerto Paulsen 1103. Imidacloprid (Provado 200 SC, 40mL 100L-1) e thiamethoxam (Actara 250 WG, 30g 100L-1) reduziram as injúrias causadas pela forma galícola da filoxera nos ponteiros em nível superior a 90%, proporcionando controle superior aos inseticidas deltamethrin (Decis 25 CE, 40mL 100L-1) e fenitrothion (Sumithion 500 CE, 150 mL/100L) considerados referência no controle do inseto. Os inseticidas acephate (Orthene 750 BR, 100g 100L-1) e abamectin (Vertimec 18 CE, 80mL 100L-1) n o foram eficientes.
Biologia comparada e exigências térmicas de Cryptoblabes gnidiella em dieta artificial
Ringenberg, Rudiney;Botton, Marcos;Garcia, Mauro Silveira;Nondillo, Aline;
Pesquisa Agropecuária Brasileira , 2005, DOI: 10.1590/S0100-204X2005001100002
Abstract: this work was conducted to evaluate the development of cryptoblabes gnidiella in artificial diets, and to know the thermal requirements of the species. biology was studied under laboratory conditions (26±1oc, relative humity of 70±10% and l/d 14:10 h) using three artificial diets based on bean (d1), white bean and pellet of alfafa (d2) and of white bean (d3). thermal requirements of honeydew moth were estimated at four constant temperatures (18oc, 22oc, 26oc e 30oc) using d2 artificial diet. based on fertility life table, d2 was the most appropriate diet to rear c. gnidiella in laboratory providing a total viability of 53.30%. the lower threshold temperature and thermal requirements for the biological cycle (egg to adult) were 12.26oc and 569.91 day degrees, respectively. the specie completes 3.25 generations in caxias do sul, rs and 9.19 in petrolina, pe.
Importancia da coordena??o nas cadeias produtivas: caso do programa de fruticultura do oeste goiano
Longhi, Eloisa Helena;Medeiros, Josemar Xavier de;
Revista de Economia e Sociologia Rural , 2003, DOI: 10.1590/S0103-20032003000300004
Abstract: este trabalho teve por objetivo analisar as dificuldades de coordena??o no ambito de uma cadeia produtiva frutícola no estado de goiás. o esfor?o na formula??o e implementa??o de programas de fruticultura por parte do estado, n?o levou na devida considera??o o papel estruturante dos segmentos líderes na tarefa de coordena??o, dificultando o efetivo desenvolvimento e inser??o da atividade frutícola no contexto do agronegócio. o estudo de caso do programa de fruticultura do oeste goiano é exemplar para analisar as variáveis que est?o contribuindo para o insucesso dessas iniciativas. para isso, a vis?o sistêmica do agronegócio serviu como fio condutor da análise, considerando coordena??o como elemento chave da competitividade.
The Effectiveness of Poly-(4-vinyl-N-hexylpyridiniumbromide) as an Antibacterial Implant Coating: An In Vitro Study
L. Ringenberg,A. Winkel,O. Kufelt,P. Behrens,M. Stiesch,W. Heuer
International Journal of Dentistry , 2011, DOI: 10.1155/2011/859140
Abstract: The clinical success of osseointegrated dental implants depends on the strong attachment of the surrounding hard and soft tissues. Bacterial adhesion on implant surfaces can cause inflammatory reactions and may influence healing and long-term success of dental implants. Promising implant coatings should minimize bacterial adhesion, but allow epithelial and connective tissue attachment. Therefore, the present study has examined the bioactive effect of poly-(4-vinyl-N-hexylpyridiniumbromide) regarding typical oral bacteria as well as cytotoxicitiy to human cells considering different methods of connecting polymers to silicate-containing surfaces. The results revealed that the application of putative antibacterial and biocompatible polymer in coating strategies is affected by a variety of parameters. Published findings regarding reduced bacterial adhesion could not be verified using oral pathogens whereas hexylated polymers seem problematic for strong adhesion of soft tissue. Concerning innovative coatings for dental implants basic aspects (surface roughness, thickness, alkylation, combination with other polymers) have to be considered in further investigations. 1. Introduction Oral implants play an important role in restorative dentistry and their clinical success has resulted in their widespread use [1]. The application of osseointegrated dental implants has been shown to be an excellent method for replacing missing teeth in patients for partial or total rehabilitation. Besides esthetic improvements and favourable phonetics, implants facilitate the restoration of mastication. Today, implant-supported prosthetic supraconstructions are of increasing importance and have partially replaced conventional prosthetic treatments [2]. Since the implementation of oral implants forty years ago, several studies have analyzed the improvements in implant material, implant surface, and implant design, in order to achieve optimal osseointegration [3–5]. While there is considerable information and progress on the osseous healing of implants, little is known about the process of bacterial interactions between the implant surface and the surrounding tissue [1]. It is only clear that bacterial adhesion on implant surfaces endangers healing and long-term success of dental implants [3, 6]. Biofilm formation on solid surfaces within oral cavity such as teeth, prostheses, or implant-anchored supraconstructions already begins within minutes after dental hygiene [7, 8]. First, a thin removable layer formed by salivary biopolymers and various proteins appears, called “acquired” or
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