oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 311 )

2018 ( 536 )

2017 ( 514 )

2016 ( 616 )

Custom range...

Search Results: 1 - 10 of 268292 matches for " Ayres de O. Menezes Junior "
All listed articles are free for downloading (OA Articles)
Page 1 /268292
Display every page Item
Population dynamic of guava psyllid Triozoida limbata (Hemiptera: Psyllidae) in Londrina Parana, Brazil/ Flutua o populacional do psilídeo-da-goiabeira, Triozoida limbata (Hemiptera: Psyllidae) na regi o de Londrina, Pr
Fernanda Maura Sassiotti Dalberto,Ayres de O. Menezes Junior,Homero Christoval Sim?es,Norton Polo Benito
Semina : Ciências Agrárias , 2004,
Abstract: The Psyllidae are sap-suckers insects, highly host and food specific, found mainly in sprouts, and are considered important guava pests. Large populations of these insects can be hazardous, since they cause plant weakness by the toxic action of the saliva injected during their feeding process. The objective of this work was to verify the population fluctuation of the psyllidae Trizoida limbata in guava trees in Londrina, Paraná, Brazil. The monitoring of an adult T.limbata population was carried out in areas of wild guava trees, using 10 yellow adhesive traps, 30 m far from each other. Collection took place monthly from March 2002 to May 2003. T.limbata populations were found during every month of the year, reaching their peak in October. Average and maximum temperatures showed a significant correlation with the psyllidae population fluctuation, affecting it positively. Heavy rain periods and low temperatures were not restricting, but they caused a reduction in population Os psilídeos s o insetos sugadores de seiva, muito específicos com rela o ao hospedeiro e alimenta o, ocorrendo principalmente em brota es, sendo considerados uma importante praga de goiabeira. Altas popula es podem tornar-se nocivas, pois provocam depauperamento das plantas pela a o tóxica da saliva injetada durante sua alimenta o. O objetivo deste trabalho foi conhecer a flutua o populacional do psilídeo Triozoida limbata em goiabeiras na regi o de Londrina, Paraná. Em áreas de ocorrência natural de plantas de goiaba foi realizado o monitoramento da popula o de adultos utilizando-se 10 armadilhas adesivas amarelas, colocadas uma por planta, distanciadas cerca de 30 metros entre si. As coletas foram realizadas mensalmente de mar o de 2002 a maio de 2003. Popula es de T. limbata ocorreram durante todos os meses do ano, com pico em outubro. Temperaturas médias e máximas apresentaram correla o significativa com a popula o do psilídeos, afetando-a positivamente. Períodos com alta pluviosidade ou baixas temperaturas n o foram limitantes, mas causaram redu o na popula o.
Population dinamic of snap bean pests on four growing seasons and its influence on productive parameters / Flutua o populacional de insetos associados ao feij o-vagem c.v. UEL-1 em quatro épocas de plantio e seu efeito sobre as características produtivas
Ayres de O. Menezes Junior,Homero Christoval Sim?es,Adriano Misael Souza,Ronaldo Mitsuo Takada
Semina : Ciências Agrárias , 2003,
Abstract: Insect pests of snap beans in northern Paraná state – Brazil were monitored during four growing seasons: March – May, May – June, August – September, September – November. Adults of leafhopper (Empoasca kraemeri), whiteffly (Bemisia tabaci) and corn rootworm (Diabrotica speciosa) were monitored weekly using a cone trap. Leafhoppers nymphs were counted in mid height trifoliate leaves. The productive parameters evaluated in harvesting were: number of pods / plant; number of marketable pods; number of damaged pods divided in bent pods, empty pods or bored pods. Insect infestation were lower in August – September growing period, which yielded higher percent of marketable pods. The highest population of leafhopper occurred in March – May period, when the percent of curved pods were also the highest. Maximum population of whitefly occurred in early season of March – May growing period. Leaf beetle (D. speciosa) population did not surpass de damage threshold in any growing period, but was higher in March – May season. Objetivou-se conhecer a flutua o populacional dos principais insetos que atacam a cultura do feij ovagem UEL-1 cultivado em diferentes épocas, e seu efeito sobre as características das vagens. Os plantios foram conduzidos na fazenda-escola da Universidade Estadual de Londrina, em quatro diferentes períodos: mar o-maio; maio-junho; agosto-setembro; setembro-novembro. Foram avaliados semanalmente os adultos da cigarrinha-verde (Empoasca kraemeri), mosca-branca (Bemisia tabaci) e vaquinha (Diabrotica speciosa) com auxílio de cone entomológico. Contagens de ninfas de E. kraemeri foram realizadas em trifólios do estrato médio da planta. Ao final de cada safra, avaliou-se o número de vagens/planta, de vagens com tamanho comercial, de vagens encurvadas, chochas e perfuradas. As menores popula es de insetos ocorreram no plantio de agosto-setembro, quando obteve-se maior porcentagem de vagens com qualidade comercial. Maior popula o de E. kraemeri ocorreu no plantio de mar o-maio, coincidindo com maiores porcentagens de vagens encurvadas. A maior infesta o de B. tabaci ocorreu no início do plantio de mar o-maio. As popula es de D. speciosa mantiveram-se em níveis baixos na maioria dos plantios, com maior incidência em mar o-maio.
Pollination and other biotic interactions in figs of Ficus eximia Schott (Moraceae)
PEREIRA, RODRIGO AUGUSTO SANTINELO;SEMIR, JO?O;MENEZES JR., AYRES DE OLIVEIRA;
Brazilian Journal of Botany , 2000, DOI: 10.1590/S0100-84042000000200011
Abstract: during the period from 1992 to 1997, interactions of several organisms and ficus eximia figs, a monoecious species, were studied in plants located in campinas/sp and londrina/pr (brazil). ficus eximia is pollinated by a single fig wasp species, pegoscapus sp. (hymenoptera: agaonidae, agaoninae), but also visited by other 14 non-pollinating wasps (agaonidae, eurytomidae, torymidae). mites (tarsonemidae), nematodes (diplogasteridae) and fungi which use the body of the pollinating fig wasp to disperse themselves were also observed.
Morfologia externa dos estágios imaturos de heliconíneos neotropicais: I. Eueides isabella dianasa (Hübner, 1806)
Antunes, Fabiano F.;Menezes Jr., Ayres de O.;Tavares, Maurício;Moreira, Gilson R.P.;
Revista Brasileira de Entomologia , 2002, DOI: 10.1590/S0085-56262002000400016
Abstract: external morphology of the immature stages of neotropical heliconians: i. eueides isabella dianasa (hübner, 1806). the external features of egg, larva and pupa of eueides isabella dianasa (hübner, 1806) (lepidoptera, nymphalidae, heliconiinae) are described and illustrated, based upon light and scanning electron microscopy.
Pollination and other biotic interactions in figs of Ficus eximia Schott (Moraceae)
PEREIRA RODRIGO AUGUSTO SANTINELO,SEMIR JO?O,MENEZES JR. AYRES DE OLIVEIRA
Brazilian Journal of Botany , 2000,
Abstract: During the period from 1992 to 1997, interactions of several organisms and Ficus eximia figs, a monoecious species, were studied in plants located in Campinas/SP and Londrina/PR (Brazil). Ficus eximia is pollinated by a single fig wasp species, Pegoscapus sp. (Hymenoptera: Agaonidae, Agaoninae), but also visited by other 14 non-pollinating wasps (Agaonidae, Eurytomidae, Torymidae). Mites (Tarsonemidae), nematodes (Diplogasteridae) and fungi which use the body of the pollinating fig wasp to disperse themselves were also observed.
First report of the electron micrograph of "Candidatus Liberibacter" particles on citrus in Brazil
Tanaka Francisco A. O.,Kitajima Elliot W.,Jesus Junior Waldir C. de,Ayres Antonio J.
Fitopatologia Brasileira , 2006,
Abstract:
Comunidades de parasitóides de Leucoptera coffeella (Guérin-Mèneville & Perrottet, 1842) (Lepidoptera: Lyonetiidae) em cafeeiros nas regi?es Oeste e Sudoeste da Bahia
Melo, Thiago Lima;Castellani, Maria Aparecida;Nascimento, Maria de Lordes do;Menezes Junior, Ayres de Oliveira;Ferreira, Gabriel Fernandes Pinto;Lemos, Odair Lacerda;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000400004
Abstract: the aim of this work was to know the diversity and the structure of parasitoid communities of leucoptera coffeella (guérin-mèneville & perrottet, 1842) in the west, municipality of luiz eduardo magalh?es, and in the southwest, municipality of vitória da conquista, of the state of bahia, brazil. the studies were developed in 2002 and 2003, by monthly samplings of leaves from the fourth pair, of branches in the three plant strata and those fallen on the ground, with a total of 1600 leaves per region and sampling period, and by collecting mines containing pupae of parasitoids and chrysalis. the material was kept in the entomology laboratory of the state university of southwestern bahia (universidade estadual do sudoeste da bahia - uesb), under ambient temperature, for the emergency of adults. the structure of communities was assessed by means of the faunistic indexes, frequency, constancy, dominance and diversity. six parasitoid species belonging to braconidade and eulophidae were identified, namely parasitoids cirrospilus neotropicus (diez & fidalgo, 2003); closteroscerus coffeellae (ihering, 1914); horismenus aeneicollis (ashmead, 1904); neochrysocharis coffeae (ihering, 1914); stiropius sp.1 and stiropius sp.2 associated to plant coffee leaf miner. there are differences in the structure of parasitoid communities according to the studied regions, being given that in the western region the predominant species was n. coffeae, while in the southwestern region, h. aeneicollis and stiropius sp.1 were the predominant ones.
Ocorrência de Lysiphlebus testaceipes (Cresson) (Hymenoptera: Aphidiidae) parasitando pulg?es (Hemiptera: Aphididae), em trigo em Medianeira, PR
Zanini, Agostinho;Prestes, Tania M.V.;Dalmolin, Maria F.;Alves, Luis F.A.;Menezes Jr., Ayres de O.;
Neotropical Entomology , 2006, DOI: 10.1590/S1519-566X2006000200020
Abstract: this paper records the occurrence of lysiphlebus testaceipes (cresson) attacking aphids in wheat plantation in medianeira, in the west region of paraná state, brazil. this microhymenoptera was introduced and released by embrapa trigo, from 1978 to 1992 in the wheat production region at the state of rio grande do sul, what suggests that individuals of this species may show high dispersal ability.
Efeito do formato de onda e gás de prote??o sobre a taxa de fus?o e geometria do cord?o na soldagem MIG/MAG-PV
Nascimento, Alexandre Saldanha do;Menezes Junior, Luiz Carlos de;Vilarinho, Louriel O.;
Soldagem & Inspe??o , 2012, DOI: 10.1590/S0104-92242012000100007
Abstract: due to the importance of variable polarity in mig/mag welding (mig/mag-pv) with great potential for overlaying and root pass applications, it is fundamental to assess the effect of process parameters on the bead formation and wire-burn rate, specially the latter, since higher melting rate is achieved by this process during negative polarity. therefore, this work aims to assess the effect of two different waveforms previously investigated, in which current pauses before and after the main pulse during positive polarity (this condition leads to better stability). the shielding gas effect was also investigated for the bead geometry (width, penetration and reinforcement), melting rate, deposition rate and deposition efficiency. bead-on-plate weldments were carried out over sae 1020 carbon steel with mig/mag-pv welding at 30 and 50% of time in negative polarity. the employed shielding gases were ar+2%o2, ar+5%o2, ar+8%co2 and ar+15%co2. the arc length was kept approximately the same during the runs by varying the wire-feed speed. also, the relationship between wire-feed speed and travel speed was kept constant in order to keep the same amount of deposited material. it is possible to conclude that the better understanding on the relationship among bead geometry, parameters and consumables leads to assure a desired bead profile, in accordance with a given application. moreover, the melting rate analysis allows selecting more coherent parameters and consumables to assure lower material losses and high productivity.
Brassinosteróide e substratos na aclimatiza o do abacaxizeiro ‘Imperial’ = Brassinosteroid and substrates in acclimatization of ‘Imperial’ pineapple
Paulo Henrique Arag?o Catunda,Claudia Sales Marinho,Mara Menezes de Assis Gomes,Almy Junior Cordeiro de Carvalho
Acta Scientiarum : Agronomy , 2008,
Abstract: O objetivo deste trabalho foi avaliar o efeito da aplica o de diferentes concentra es de um análogo de brassinosteróide (BIOBRAS – 16) e de dois substratos sobre o crescimento de mudas micropropagadas do abacaxizeiro ‘Imperial’. O experimento foi conduzido em DBC, em esquema fatorial 2 x 5 x 4, no qual foram avaliadas cincoconcentra es do BIOBRAS - 16 (0; 0,1; 0,3; 0,5 e 1 mg L-1), dois tipos de substratos e quatro épocas de amostragem (60, 90, 120 e 150 dias após transplantio). Os substratos utilizados foram o Plantmax e outro substrato obtido pela compostagem de uma mistura entre o baga o-de-cana e torta de filtro (BT). As plantulas foram transplantadas para tubetes c nicos em casa-de-vegeta o equipada com nebulizadores intermitentes. As plantas cultivadas no substrato BT e pulverizadas com 0,1 mg L-1 do BIOBRAS - 16 apresentaram maior crescimento da parte aérea, com maior número de folhas, diametro de roseta, largurade folha, massa fresca e massa seca, aos 150 dias após transplantio. Nas plantas cultivadas no substrato BT as pulveriza es com o BIOBRAS-16 a 0,1 mg L-1 proporcionaram acúmulo de matéria seca 2,8 vezes superior ao valor da testemunha cultivada no substrato Plantmax . A massa fresca e seca de raízes foram superiores no substrato Plantmax em rela o ao BT, nas últimas épocas de amostragem. This work aimed to evaluate the effects of different concentrations of a brassinoesteroid analogue (BIOBRAS-16) and two substrates on the growth of micropropagated seedlings of ‘Imperial’ pineapple. A randomized block design was used in a 2 x 5 x 4 factorial scheme, evaluating five concentrations of BIOBRAS-16 (0; 0.1; 0.3; 0.5and 1 mg L-1), two types of substrates and four sampling periods (60, 90, 120 and 150 day safter planting). The substrates used were Plantmax and another obtained from a mix of composting sugar-cane bagasse and filter cake (CC). The seedlings were transplanted tosmall conic tubes and allocated in a greenhouse equipped with an intermittent mist. The plants cultivated in CC substrate and sprayed with 0.1 mg L-1 of BIOBRAS-16 showed higher growth of shoots with greater numbers of leaves, rosette diameter, leaf width, freshand dry matter production at 150 days after planting. The plants that were cultivated on CC substrate and sprayed with BIOBRAS-16 at a 0.1 mg L-1 produced 2.8 times more dry matter than the control cultivated in Plantmax substrate. The fresh and dry matter of roots were superior in Plantmax when compared to CC at late sampling periods.
Page 1 /268292
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.