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Search Results: 1 - 10 of 31008 matches for " Vicente Paulo;Dias-Arieira "
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Resíduos de frutos de pequi no controle do nematóide das galhas em tomateiro
Ribeiro, Hudson B;Ribeiro, Regina Cássia F;Xavier, Adelica Aparecida;Campos, Vicente Paulo;Dias-Arieira, Cláudia Regina;Mizobutsi, Edson Hiydu;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000300016
Abstract: the exocarp and external mesocarp of pequi fruit are discarded during the extraction of internal mesocarp which is the commercial part used as food. the objective of this research was to study the use of aqueous extract and of pequi ground-powder to the control of root-knot nematode (meloidogyne javanica). from ground pequi fruit exocarp and external mesocarp were obtained the aquaeous extract and powder. five doses of aquaeous extract (0.0; 2.5; 5; 10 or 20%) were evaluated on root-knot nematode j2 (second stage juvenile) hatching and mortality. the assays were carried out in entirely randomized design with 10 replications. the hatching assay was set in petri plates with 800 nematode eggs and 10 ml of different doses of extract. during 14 days we counted the number of hatched juveniles under optical microscope. the mortality assay of root-knot nematode was evaluated putting 100 μl of each dose of extract plus 20 μl of supension containing 20 j2 in each cell elisa plate. after 24 h was counted the number of live and dead juveniles. the pequi powder was tested in tomato plants in greenhouse in four doses (0; 7.5; 15 or 30 g/4 kg of soil) in randomized blocks design with 10 replications per treatment. the pequi powder was incorporated to the soil seven days before transplanting and nematode eggs inoculation was carried out after transplanting. after 40 days we evaluated the number of galls, egg masses, eggs/root and j2 per 200 cm3 soil and the tomato shoot dry weight and height. the aquaeous extract reduced j2 hatching and increased j2 mortality. the increased application of powder doses reduced the number of galls, egg masses and eggs of root-knot nematodes per root system and the tomato shoot dry weight being a good indication of phytotoxicity.
Flutua??o populacional e efeito da distancia e profundidade sobre nematoides em bananeira no norte de Minas Gerais
Ribeiro, Regina Cássia Ferreira;Xavier, Fábio Ruas Pereira;Xavier, Adelica Aparecida;Almeida, Vicente Ferreira;Mizobutsi, Edson Hyidu;Campos, Vicente Paulo;Ferraz, Silamar;Dias-Arieira, Claudia Regina;
Revista Brasileira de Fruticultura , 2009, DOI: 10.1590/S0100-29452009000100016
Abstract: the distribution of meloidogyne javanica and helicotylenchus multicinctus populations was assessed in naturally infested area cultivated with banana cv. prata-an? irrigated by microaspersion. soil samples were taken at distances of 20, 40, 80 and 120 cm from the pseudostem and from 20, 40 and 60 cm of depth, bimonthly, per two years. the population densities of m. javanica and h. multicinctus were greater at distances of 20 and 40 cm from the pseudostem, respectively. the population of both species m. javanica and h. multicinctus was high in december 2002 and decreased until november 2004 when it became stable.
Efeito de diferentes laminas de irriga??o sobre a popula??o de meloidogyne javanica e a produtividade de bananeira no norte de minas gerais
Ribeiro, Regina Cássia Ferreira;Costa, Cristiane Correa;Xavier, Adelica Aparecida;Figueiredo, Flávio Pimenta de;Oliveira, Flávio Gon?alves;Campos, Vicente Paulo;Dias-Arieira, Claudia Regina;Mizobutsi, Edson Hyidu;
Revista Brasileira de Fruticultura , 2009, DOI: 10.1590/S0100-29452009000100014
Abstract: the present work aimed to assess in the field the effect of irrigation different levels (100%, 125%, 150% and 175%) determined by evapotranspiration from the tank class a (ettca), on the population of meloidogyne javanica in the soil, banana productivity and number of days needs for flowering and yield of prata-an? cultivar of banana on the north of minas gerais state, brazil. the number of second stage juveniles of m. javanica increased reaching the maximum j2 level at 118% of ettca. the irrigation levels, 125, 150 and 175% ettca increased the banana productity in kg/ha-1 significantly as compared to 100% level. however, no effect was observed on the number of days for flowering and for harvesting of prata-an? banana.
Avalia??o do aprendizado via educa??o a distancia: a vis?o dos discentes
Arieira, Jailson de Oliveira;Dias-Arieira, Cláudia Regina;Fusco, José Paulo Alves;Sacomano, José Benedito;Bettega, Maria Odette de Pauli;
Ensaio: Avalia??o e Políticas Públicas em Educa??o , 2009, DOI: 10.1590/S0104-40362009000200007
Abstract: the long-distance education is an important movement in the educational context which recently has gained space due to the impulse received by the development of the computer science tools and communication. so, the article is inserted in this context, abundance of technological resources, rapidity in communication, greater interactivity by internet and requirement of capacity by the labor market. this work had as main goals: to evidence the position of the current education academics on the long-distance education methodology; to evaluate the strong and weak points of this new methodology in their points of view; and also to evaluate their perception in relation to the advantages and disadvantages of this method compared to the current one. a research with half-structured questionnaires was made with a group of 30 academics from a higher education institution. as the results showed, the way how the academics have received and inserted themselves in the dynamics of the on line education deserves attention. the majority of the pupils are satisfied with the results and with the possibilities that this kind of education adds to their learning. it was verified that the academics recognize the importance of the long-distance education, although they still prefer the traditional model of education. we had better keep in mind that this is merely an exploratory study, where questions on the subject had been raised, and that these questions have to be better explored and discussed in other works, such as: how would the academics like to use the moodle tool; what are the aspects or factors that motivate the long-distance study.
Evaluation of acibenzolar-S-methyl for the control of Meloidogyne javanica and effects on the development of susceptible and resistant soybean
Heriksen H. Puerari,Claudia R. Dias-Arieira,Tais S. Dadazio,Danielle Mattei
Tropical Plant Pathology , 2013,
Abstract: The aim of this study was to evaluate the activity of elicitor, acibenzolar-S-methyl (ASM), in inducing resistance to Meloidogyne javanica in soybean and in enhancing plant development. Plantlets of the soybean susceptible cultivar BRSMT-Pintado and the resistant cultivar MG/BR 46 Conquista were treated with ASM (0.5 g/L) at three different times: seven days before, one day before and seven days after inoculation with 2000 eggs/plant. Untreated inoculated plants and untreated non-inoculated plants were used as controls. Sixty days after inoculation, the number of galls, eggs/g root and vegetative parameters (height, aerial part fresh and dry mass and root fresh mass) were evaluated. The experiments were conducted over two different periods (Experiments 1 and 2). Only in Experiment 2 treatment "seven days before inoculation" reduced the number of eggs/g root, irrespective of the cultivar evaluated, but the number of galls was not affected. Stronger plant development was observed in the susceptible soybean cultivar treated seven days before inoculation in Experiment 2.
Nematóides Causadores de Doen as em Frutíferas. = Nematoses which cause diseases in fruit trees.
Claudia R. Dias-Arieira,Rúbia de O. Molina,Alessandra T. Costa
Agro@mbiente On-line , 2008,
Abstract: Nos últimos anos, a fruticultura nacional passou por uma grande expans o, dentre os fatores que contribuíram para o aumento na área cultivada cita-se as condi es climáticas favoráveis, que permitem produzir praticamente todos os tipos de frutas. No entanto, as frutíferas podem apresentar, ao longo do seu desenvolvimento e produ o, diversos problemas fitossanitários, dentre eles o parasitismo por nematóides. Nematóides s o importantes parasitos de plantas e encontram-se disseminados por todas as áreas nas quais a agricultura é explorada. Praticamente todas as espécies cultivadas s o suscetíveis a esses patógenos, incluindo as frutíferas. No Brasil, há relato de 70 espécies de nematóides que atacam essas espécies. A fauna nematológica na rizosfera e no rizoplano de uma dessas plantas é bastante diferenciada e complexa, com algumas espécies de nematóides apresentando alta capacidade de reprodu o, o que pode, ao longo do tempo, causar declínio da planta e redu o na vida útil do pomar. Neste contexto, este trabalho teve como objetivo fazer uma abordagem geral em rela o aos nematóides associados às principais frutíferas cultivadas no Brasil.= National fruit growing has spread a great deal in the past years. Favorable climate conditions which make growing basically every kind of fruit possible are among the aspects contributing to the increase of the crop area. However, fruit may present a number of phytosanitary problems throughout its development and growing such as parasite nematodes. Nematodes are important plant parasites disseminated in areas where agricultural areas. Practically all of the growing species are susceptible to these pathogens, including fruit. In Brazil, there is the report of 70 nematode species which attack fruit species. Nematode fauna inside the rhizosphere and the rhizoplane of these plants is much differentiated and complex, with some species of nematodes presenting high reproduction capacity, what may, in the long run, cause decline of the plant and the reduction of the lifetime of the orchard. Thus, this paper overviews the nematodes associated with the main fruit grown in Brazil.
Análise da viabilidade econ mica para produ o de flores em Umuarama, noroeste do Paraná. = Analisys of the economic viability of fl ower production in Uuarama, northwest Paraná.
Claudia Regina Dias-Arieira,Daniela Alves dos Santos Morita,Jailson de Oliveira Arieira,Jo?o Marcos Codato
Agro@mbiente On-line , 2008,
Abstract: O noroeste do Paraná caracteriza-se pelas atividades agropecuárias, com ênfase na explora o de grandesculturas, como soja, milho e cana-de-a úcar e na pecuária de corte. Contudo, outras oportunidades têm se apresentado dadaa crescente dinamica da atividade econ mica brasileira. A produ o de fl ores é uma alternativa para os pequenos e médiosempresários rurais, e uma atividade em expans o no Brasil. Além disso, fatores como difi culdades de escoamento, transportee armazenamento, antes limitantes dessa cultura, hoje têm sido superados com pesquisas e tecnologia. No entanto, antes de seefetivar o investimento, o empresário deve fazer um estudo da viabilidade técnica e econ mica da atividade ou cultura a serimplantada, conhecer suas peculiaridades e estar apto a aproveitar as oportunidades e a proteger-se das amea as do negócio.Dentre tais peculiaridades, deve-se destacar a estrutura de custos da atividade, identifi cando os principais fatores de produ oque afetam o rendimento e a rentabilidade do negócio. Objetivou-se com esse trabalho avaliar a viabilidade de implanta o emanuten o de uma estrutura de produ o de fl ores em Umuarama, regi o noroeste no Paraná. = The northeastern of Paraná is characterized by agribussines activities with enfasis on agricultural exploration, assoybean, corn, sugar cane and meat cattle. However, others opportunities are present, by moment of brasilian economy. Theflowers production is an alternative for the agricultural entrepeneurs and an activity in growth in Brazil. Moreover, factorsas diffi cults of dry, transport and stock, before limitantes for this culture, have been eliminated with research and tecnology.However, if accomplishing the investment, the entrepreneur must make a study of the economic and technological viability ofthe activity or culture to be implanted, to know your peculiarities and left it apt to use to advantage the chances and to protectthemselves of the threats of the business. Amongst such peculiarities, the structure of costs of the activity must be detached,identifying the main factors of production that affect the income and the yield of the business. Therefore, the present workintended to evaluate the viability of implantation and maintenance of a structure of production of fl owers in Umuarama, regionthe northwest in the Paraná.
Viabilidade e sobrevivência do inóculo de Heterodera glycines ra?a 3 no solo
Mizobutsi, Edson H.;Ferraz, Silamar;Mizubuti, Eduardo S.G.;Dias-Arieira, Claudia R.;Ribeiro, Regina C.F.;
Tropical Plant Pathology , 2012, DOI: 10.1590/S1982-56762012000300011
Abstract: alternative hosts of phytonematodes can cause nutritional restriction and affect infectivity and fertility of the nematode. in this study, we evaluated the effect of the host plant on inoculum viability of heterodera glycines race 3 and survival of this inoculum in soil. the nematode was multiplied in resistant (line l2300) and susceptible (cv. ouro) beans and susceptible soybeans (cv. ft-cristalina), and the egg suspensions were prepared from females collected on these hosts. to evaluate penetration of second stage juveniles and development of the nematode to the adult phase, suspensions of 2,000 eggs were placed in soybean 'ft- cristalina' plants (test plant). at ten days after inoculation, we evaluated the number of juveniles that penetrated the roots. the number of females per root system was evaluated at 30 days. the inoculum obtained from line l2300 resulted in fewer juveniles and females inside the roots of the test plant. the inoculum obtained from soybean resulted in higher penetration and development of the nematode. to evaluate the survival of the inoculum, cysts of h. glycines produced in the different hosts remained in the soil, without plants, for 18 months. the lower percentage of eggs that survived in the soil was originated from cysts multiplied in beans, line l2300 or cv. ouro. it can be concluded that the inoculum of h. glycines produced in bean plants, resistant or susceptible, has lower viability and survival in the soil.
Atividade do óleo de Eucalyptus citriodora e Azadirachta indica no controle de Colletotrichum acutatum em morangueiro
Dias-Arieira, Cláudia Regina;Ferreira, Lucas da Rocha;Arieira, Jailson de Oliveira;Miguel, Edenilson Gon?alves;Donega, Mateus Augusto;Ribeiro, Regina Cássia Ferreira;
Summa Phytopathologica , 2010, DOI: 10.1590/S0100-54052010000300007
Abstract: anthracnose is one of the most important diseases in strawberry crop, and the search for control alternatives has been frequent, especially in organic cultivation areas. thus, the present study aimed to evaluate the in vitro and in vivo efficiency of eucaliptus citriodora and azadirachta indica oil on the control of colletotrichum acutatum in strawberry. in the in vitro experiment, mycelial growth inhibition was determined when the fungus was subjected to extracts at the following concentrations: 0; 0.25; 0.5; 1.0; and 1.5%. in the field, the disease control was evaluated through oil spraying at 0, 0.5 and 1.0% concentrations at intervals of seven, fifteen and thirty days, in plants inoculated with 106 conidia/ml suspension. evaluations were weekly performed, and parameters such as occurrences and size of lesions in the peduncle and in the fruits, flower abortion, productivity, and natural disease occurrences were observed. in vitro, all treatments showed significant reduction in the mycelial growth relative to control. in the field, only neem oil had a significant effect decreasing flower abortion and the occurrences of sick fruits originated from inoculated flowers. however, natural disease occurrence was higher when 1.0% was weekly sprayed.
Reaction of vegetables and aromatic plants to Meloidogyne javanica and M. incognita
Dias-Arieira, Cláudia Regina;Cunha, Tatiana PL da;Chiamolera, Fernando Marcelo;Puerari, Heriksen H;Biela, Fabio;Santana, Simone de M;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000200023
Abstract: for this research we used 15 day-old seedlings which were transplanted to 2 l pots and inoculated with 4,000 nematode eggs plus juveniles (j2). after 60 days, the root systems were removed and the number of galls and eggs evaluated and used to calculate the nematode reproduction factor (rf). the tomato cv. santa cruz was used as a susceptible control. the experimental design was completely randomized, with six replications. averages were compared using the tukey or scott-knott test at 5%. for lettuce, salad bowl (mimosa type), elizabeth and elisa (lisa) and vera cultivars (crisphead), the number of galls and the rf for m. javanica were statistically higher than for the control, whereas, for the other vegetable crops, the highest number of galls and eggs were found in chicory and basil. the highest susceptibility to m. incognita was observed in mimosa lettuce cv. salad bowl, chicory cultivars, parsley cv. graúda portuguesa and basil. marjoram exhibited no m. incognita galls.
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