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Search Results: 1 - 10 of 221870 matches for " JOSé ADALBERTO DE;ALENCAR "
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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.
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.
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.
An Ecosystem (ECO) Approach on Wisdom Societies and Sociotechnical Systems  [PDF]
Antonio José Balloni, Adalberto Mantovani Martiniano de Azevedo, Marco Antonio Silveira
Open Journal of Political Science (OJPS) , 2012, DOI: 10.4236/ojps.2012.23004
Abstract: Abstract: This paper explores the challenges and expresses some reflections on information and Knowledge/Wise (KW) societies and Socio-technical Systems (SS) based on an Organizational Eco-systems (ECOs) approach. It considers the SS constituting KW societies as a set of heterogeneous and interactive actors and presents considerations on the challenges faced by an organizational Ecosystem (ECO), challenges that require organizations actions towards treatment of organizations as living beings inserted in ECOs, aiming to leverage organizational synergism and collaborative efforts; information partnership and collaborative relationships between ECOs members; a more fairly shared leadership, empowering bottom up processes on organizational ECOs decision making. It is presented a brief case regarding Brazil’s Public Research and Development arrangement “National Institute of Science and Technology in Micro and Nano-electonic Systems” (NAMITEC), relating this initiative advances and problems in terms of multi-organizational cooperation and transference of technological knowledge to the productive sector and to society.
A natureza e a cultura no compasso de um naturalista do século XIX: Wallace e a Amaz?nia
Alves, José Jer?nimo de Alencar;
História, Ciências, Saúde-Manguinhos , 2011, DOI: 10.1590/S0104-59702011000300010
Abstract: alfred russel wallace traveled through the amazon from 1848 to 1852. his perceptions of the region were informed by his systematized knowledge but also influenced by judgments of an ethical and aesthetic nature, as was common among naturalists. he saw the region's 'natives' as peaceful and friendly but likewise susceptible to the vices of civilization. nature afforded a privileged setting both for the activities of natural history and for aesthetic pleasures. these features helped keep the naturalist in the region, where he could thus engage in his scientific activities.
Determina??o experimental dos raios cristalográficos dos íons sódio e cloreto
Tubino, Matthieu;Simoni, José de Alencar;
Química Nova , 2007, DOI: 10.1590/S0100-40422007000700046
Abstract: this experiment, where very common materials and equipments are used, conducts to good and interesting results related to the ionic radii of sodium and chloride ions. it also offers an excellent opportunity to discuss the crystalline arrangement of solids and to apply simple mathematical tools for calculations. other important concepts such as density, solubility and saturated solution are also used. the simplicity of the experiment creates an excellent opportunity for reasoning with the students about the technique.
Refletindo sobre o caso celobar?
Tubino, Matthieu;Simoni, José de Alencar;
Química Nova , 2007, DOI: 10.1590/S0100-40422007000200048
Abstract: by mid 2003, the brazilian people accompanied astonished, in the press, the news about the death of more than 20 persons due to ingestion of a pharmaceutical product containing a suspension of barium sulfate (celobar?) commonly used as a radiological contrast. analysis of the product indicated the presence of barium carbonate (about 13% weight/weight) which reacts easily with the hydrochloric acid in the stomach liberating barium ions, a severe poison. in this article, we briefly discuss the possible economic, personal and technical causes that led to this disaster.
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