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Search Results: 1 - 10 of 10476 matches for " FRANCISCA NEMAURA PEDROSA;BARBOSA "
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EFEITO DO CONTROLE CULTURAL E QUíMICO SOBRE O áCARO DA NECROSE DO COQUEIRO, EM COCO-AN?O IRRIGADO
ALENCAR, JOSé ADALBERTO DE;ALENCAR, POLIANNA CALINE GRANJA DE;HAJI, FRANCISCA NEMAURA PEDROSA;BARBOSA, FLáVIA RABELO;
Revista Brasileira de Fruticultura , 2001, DOI: 10.1590/S0100-29452001000300026
Abstract: one of the most harmful pests of coconut tree crop is the mite aceria guerreronis. this pest damage the coconut fruits in the first development stage, causing partial or total losses in fruit production. the objective of this work was to evaluate the effect of chemical products and crop management in the control of a. guerreronis, aiming to use them in a management program for this pest. the research was carried out in petrolina-pe from august to december, 1999. a complete randomized block design, with four treatments and four replications, was used. each replication consisted of two plants of green dwarf coconut tree variety. treatments were: a ? cleaned plants without chemical control; b ? cleaned plants with chemical control; c ? plants not cleaned and with chemical control; d ? plants not cleaned and without chemical control. all fruits damaged by mite were taken out from plants in the treatments with cleaned plants for three times. fenpyroxymate, tetradifon and adhesive, at the levels 200ml, 300ml and 15ml for 100 l water, respectively, were mixed and applied for three times. results showed that the individual uses of chemical products and crop management had efficiency of 26-87% and 64-89%, respectively, on mite control. however, the association of these two control managements showed a synergic effect on mite control with efficiency of 87-96%.
EFEITO DO CONTROLE CULTURAL E QUíMICO SOBRE O áCARO DA NECROSE DO COQUEIRO, EM COCO-AN O IRRIGADO
ALENCAR JOSé ADALBERTO DE,ALENCAR POLIANNA CALINE GRANJA DE,HAJI FRANCISCA NEMAURA PEDROSA,BARBOSA FLáVIA RABELO
Revista Brasileira de Fruticultura , 2001,
Abstract: Dentre as pragas que atacam a cultura do coco (Cocos nucifera), destaca-se o ácaro da necrose, Aceria guerreronis. Esta praga danifica os frutos nos primeiros estágios de desenvolvimento, podendo acarretar perdas parciais ou totais na produ o de frutos. Este trabalho teve como objetivo avaliar o efeito de medida química e cultural no controle de A. guerreronis, visando à utiliza o dessas duas medidas em um programa de manejo dessa praga. O trabalho foi realizado em Petrolina-PE, no período de agosto a dezembro de 1999. Foi utilizado o delineamento em blocos ao acaso, com quatro tratamentos e quatro repeti es, sendo cada repeti o composta por duas plantas da variedade coco-an o verde. O trabalho foi composto pelos seguintes tratamentos: A -- plantas com limpeza e sem tratamento químico; B -- plantas com limpeza e com tratamento químico; C -- plantas sem limpeza e com tratamento químico; D -- plantas sem limpeza e sem tratamento químico (testemunha). Na limpeza das plantas, retiraram-se todos os frutos danificados pelo ácaro da necrose, repetindo esta etapa por três vezes. Utilizaram-se os produtos fenpyroxymate, tetradifon e surfactante, em mistura, na dose de 200ml, 300ml e 15ml, respectivamente, para 100 l de água. Foram realizadas três pulveriza es com intervalos de vinte dias. Os resultados mostraram que a utiliza o das medidas cultural e química, de forma individual, apresentou uma eficiência de 26% a 87% e 64% a 89%, respectivamente, no controle do ácaro. No entanto, a associa o dessas duas medidas de controle apresentou um efeito sinérgico com eficiência de 87% a 96%.
Efeito do controle químico da mosca-branca na incidência do vírus-do-mosaico-dourado e na produtividade do feijoeiro
Barbosa, Flávia Rabelo;Siqueira, Katia Maria Medeiros de;Souza, Eduardo Alves de;Moreira, Wellington Antonio;Haji, Francisca Nemaura Pedrosa;Alencar, José Adalberto de;
Pesquisa Agropecuária Brasileira , 2002, DOI: 10.1590/S0100-204X2002000600018
Abstract: the objective of this work was to evaluate the effect of insecticides on the control of whitefly (bemisia argentifolii bellows & perring, 1994), on golden mosaic virus incidence and on common bean yield. seed treatment with the insecticides imidachloroprid or thiamethoxam followed by insecticide sprays at weekly internals were used. the experiment was conducted in a randomized complete block design in an irrigated area in petrolina, pe, brazil, with five treatments and four replicates. the chemical control decreased significantly the number of eggs, nymphs and adults, and also the percentage of infection by the golden mosaic virus in the bean crop. grain yields for chemical treatments in the tilled plots ranged from 1,930 to 2,405 kg/ha, while the control yielded 1,490 kg/ha. there were no significant differences for number of pods per plant and for 100-seed weight.
Nível de dano, plantas invasoras hospedeiras, inimigos naturais e controle do psilídeo da goiabeira (Triozoida sp.) no submédio S?o Francisco
Barbosa, Flávia Rabelo;Ferreira, Rachel Gon?alves;Kiill, Lúcia Helena Piedade;Souza, Eduardo Alves de;Moreira, Wellington Antonio;Alencar, José Adalberto de;Haji, Francisca Nemaura Pedrosa;
Revista Brasileira de Fruticultura , 2003, DOI: 10.1590/S0100-29452003000300016
Abstract: this study was conducted to increment the integrated management of triozoida sp. (hemiptera, psylliidae) in guava plants at the s?o francisco river valley. the damage level, weed hosts, selectivity and effect of the thiamethoxam 10gr and 250wg in the control of psylliidae were evaluated. the experiment was carried out in an irrigated area, at petrolina, pernambuco, in a randomized block design with four replications. treatments consisted of: 1) thiamethoxam 10gr applied on soil; 2) thiamethoxam 250wg sprayed weekly; 3) thiamethoxam 10gr applied on soil + thiamethoxam 250wg sprayed weekly; 4; 5; 6) thiamethoxam 250wg sprayed when 10, 20 and 30% of infested branches were reached, respectively; 7; 8; 9) thiamethoxam 10gr applied on soil + thiamethoxam 250wg sprayed when 10, 20 and 30% of infested branches were reached, respectively; and 10) control (no insecticide). the percentage of infested branches in the control treatment differed significantly from the treatments 2 (2.8%), 3 (4.3%), 4 (19.7%), 7 (13.4%), 8 (14.5%) and 9 (15.0%). when thiamethoxam was used, the population reduction of natural enemies ranged from 12.5 to 39.6%, corresponding, in the selective scale, to grades (1 = non offensive (< 25%), 2 = not very toxic (25-50%). number and weight of fruits were similar in all the treatments. fifty one weed species and no host of triozoida sp. were found.
Biologia de Trichogramma pretiosum Riley em ovos de Sitotroga cerealella (Olivier)
ALENCAR, JOSé ADALBERTO DE;HAJI, FRANCISCA NEMAURA PEDROSA;OLIVEIRA, JOSé VARGAS DE;MOREIRA, ANDRéA NUNES;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000800021
Abstract: biological aspects of the parasitoid trichogramma pretiosum riley (hymenoptera: trichogrammatidae) were studied in eggs of its factitious host, sitotroga cerealella (olivier) (lepidoptera: gelechiidae), with the objective of obtaining basic information about the biology of this parasitoid under environmental lab conditions. there was no control of temperature, relative humidity and photoperiod with the purpose of simulating the natural conditions of the submédio s?o francisco region, pernambuco state, brazil. the mean temperature during the study was 25.9± 0.9°c. the results showed a mean duration of the period egg-adult of 9.42 days and a viability of parasited eggs of 88%. the mean number of t. pretiosum emerged by egg of the host was 1.41 with a maximum of two individuals/egg. the mean longevity of females was 5.53 days while the males lived an average of 3.08 days when both were fed with pure honey.
Visitantes florais de plantas invasoras de áreas com fruteiras irrigadas
Kiill, Lúcia Helena Piedade;Haji, Francisca Nemaura Pedrosa;Lima, Paulo César Fernandes;
Scientia Agricola , 2000, DOI: 10.1590/S0103-90162000000300034
Abstract: weeds can impair yield of irrigated fruit crops, studies about their ecology being needed, especially ways of reproduction and association with insects. this work was carried out in petrolina, pe, brazil with the objective of identifying the floral visitors of weeds, and classifying them as pollinators and pollen and/or nectar thieves, according to their behavior. the observations were made between may and october of 1998, in 26 not consecutive days, between 7:00 am and 4:00 pm. the weeds were classified in nectariferous and polliniferous when these were visited exclusively for collection of nectar or pollen, and mixed when these were visited to collect both. a grade system was adopted for the frequency evaluation: a- number of visits >30, b - between 10 to 30, c - <10. among the 24 weeds observed, 14 were classified as nectariferous, six as polliniferous and four were considered mixed. among the floral visitors, the following bees were registered (xylocopa grisescens, x. frontalis, centris aff. perforator, ptilotrix aff. plumata, diadasina riparia, apis mellifera, trigona spinipes, eulaema nigrita), butterflies (ascia monuste, papilio thoas brasiliensis, agraulis vanillae) and hummingbirds (phaethornis sp., chlorostilbon aureoventris). the bees were predominant in number of species (61.5%) as well as in the frequency of visits. they acted as pollinator agents in 83% of weeds visited. the butterflies were considered nectar thieves, and they acted as pollinator agents only in the case of the species of emilia. the hummingbirds acted as pollinators for all visited species.
Biologia de Trichogramma pretiosum Riley em ovos de Sitotroga cerealella (Olivier)
ALENCAR JOSé ADALBERTO DE,HAJI FRANCISCA NEMAURA PEDROSA,OLIVEIRA JOSé VARGAS DE,MOREIRA ANDRéA NUNES
Pesquisa Agropecuária Brasileira , 2000,
Abstract: Estudaram-se, em laboratório, aspectos biológicos de Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) em ovos do hospedeiro alternativo Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae), visando à obten o de informa es básicas sobre a biologia desse parasitóide em condi es de laboratório. N o houve controle de temperatura, umidade relativa e fotoperíodo, com o objetivo de simular as condi es do Submédio do Vale do S o Francisco, Estado de Pernambuco. A temperatura média registrada durante o desenvolvimento do trabalho foi 25,9±0,9°C. Os resultados mostraram uma dura o média do período ovo-adulto de 9,42 dias e uma viabilidade de ovos parasitados de 88%. O número médio de T. pretiosum emergido por ovo do hospedeiro foi de 1,41, com um máximo de dois indivíduos/ovo. As fêmeas viveram, em média, 5,53 dias, enquanto os machos apresentaram longevidade média de 3,08 dias, quando ambos os sexos foram alimentados com mel puro.
Visitantes florais de plantas invasoras de áreas com fruteiras irrigadas
Kiill Lúcia Helena Piedade,Haji Francisca Nemaura Pedrosa,Lima Paulo César Fernandes
Scientia Agricola , 2000,
Abstract: As plantas invasoras afetam a produtividade das fruteiras irrigadas, sendo necessários estudos sobre sua ecologia, principalmente formas de reprodu o e associa o com insetos. O presente trabalho foi desenvolvido em Petrolina-PE, objetivando classificar os visitantes florais de plantas invasoras em polinizadores e pilhadores, de acordo com o comportamento apresentado. As observa es foram feitas de maio a outubro de 1998, em 26 dias n o consecutivos, no intervalo das 7h00 às 16h00. As invasoras foram classificadas em nectaríferas e poliníferas, quando visitadas para retirada exclusiva de néctar ou de pólen; e em mistas, quando visitadas para retirada dos dois recursos. Para a análise de freqüência foi adotado um sistema de notas: a- número de visitas >30, b- entre 10 e 30 e c- <10 visitas. Das 24 invasoras observadas, 14 foram consideradas nectaríferas, seis poliníferas e quatro mistas. Entre os visitantes florais foram registradas abelhas (Xylocopa grisescens, X. frontalis, Centris aff. perforator, Ptilotrix aff. plumata, Diadasina riparia, Apis mellifera, Trigona spinipes, Eulaema nigrita), borboletas (Ascia monuste, Papilio thoas brasiliensis, Agraulis vanillae) e beija-flores (Phaethornis sp., Chlorostilbon aureoventris). As abelhas apresentaram maior número de espécies (61,5%) e de visitas, além de agirem como polinizadores em 83% das invasoras visitadas. As borboletas foram consideradas pilhadores de néctar, participando como polinizadores de Emilia spp. e os beija-flores, considerados polinizadores das invasoras visitadas.
The Advection Diffusion-in-Secondary Saturation Movement Equation and Its Application to Concentration Gradient-Driven Saturation Kinetic Flow  [PDF]
Tafireyi Nemaura
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.411200
Abstract: This work describes the deterministic interaction of a diffusing particle of efavirenz through concentration gradient. Simulated pharmacokinetic data from patients on efavirenz are used. The Fourier’s Equation is used to infer on transfer of movement between solution particles. The work investigates diffusion using Fick’s analogy, but in a different variable space. Two important movement fluxes of a solution particle are derived an absorbing one identified as conductivity and a dispersing one identified as diffusivity. The Fourier’s Equation can be used to describe the process of gain/loss of movement in formation of a solution particle in an individual.
The Advection Wave-in-Secondary Saturation Movement Equation and Its Application to Concentration Tension-Driven Saturation Kinetic Flow  [PDF]
Tafireyi Nemaura
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.412210
Abstract: The deterministic description of a wave of solution particle of efavirenz is given. Simulated pharmacokinetic data points from patients on efavirenz are used. The one dimensional wave equation is used to infer on transfer of vibrations due to tension between solution particles. The work investigates movement using wave analogy, but in a different variable space. Two important movement fluxes of a wave are derived an attracting one identified as tension conductivity and a dispersing one identified as tension diffusivity. The Wave Equation can be used to describe another spin-off movement flux formed induced by vibrations in solution particle.
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