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Search Results: 1 - 10 of 470041 matches for " Manoel Guedes Corrêa Gondim Junior "
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Exigências térmicas e tabela de vida de fertilidade de Amblyseius largoensis
Galv?o, Andréia Serra;Gondim Junior, Manoel Guedes Corrêa;Moraes, Gilberto José de;Oliveira, José Vargas de;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000700003
Abstract: amblyseius largoensis (muma) (acari: phytoseiidae) is a species widely spread and naturally occurring in the tropics and subtropics regions. this species is also associated with perennial plants and considered an important predator of aceria guerreronis keifer (acari: eriophyidae) in coconut trees (cocos nucifera l.). the objective of this research was to determinate the thermal requirements of a. largoensis fed with a combination of tetranychus urticae koch (acari: tetranychidae), pollen of ricinus communis l. and a 10 % honey solution. the study was conducted at 18, 21, 24, 27 and 30°c, 70 ± 10 % relative humidity and 12 h photophase. at these temperatures, the period from egg-adult lasted 14.0, 8.6, 6.1, 5,0 e 3.9 respectively. at those temperatures, the threshold temperature for the development of larva, protonynph, deutonymph and egg-adult were 13.3, 13.3, 13.5, 11.9 and 13.3°c, and the thermal constants were 20.9, 13.5, 14.9, 18.9 and 66.1 degree-days, respectively. the fertility life table parameters were better in the 27 and 30°c.
Toxicidade de natuneem sobre Tetranychus urticae Koch (Acari: Tetranychidae) e ácaros predadores da família Phytoseiidae
Brito, Hilda Maria;Gondim Junior, Manoel Guedes Corrêa;Oliveira, José Vargas de;Camara, Cláudio Augusto Gomes da;
Ciência e Agrotecnologia , 2006, DOI: 10.1590/S1413-70542006000400014
Abstract: the toxicity of the natuneem at different concentrations for both tetranychus urticae koch and two predatory mites euseius alatus de leon and phytoseiulus macropilis (banks) were studied. the toxicity on eggs, and the residual and repellent effects on adults was evaluated. egg treatment consisted on dipping eggs into natuneem dilutions for five seconds; and residual and repellent effects for adults consisted on dipping leaf discs of canavalia ensiformes (l.) dc. into the dilutions for five seconds. natuneem was repellent for t. urticae and e. alatus at the concentrations 0.25, 0.50 and 1.0%, and exhibited neutral effect on p. macropilis. the toxicity of natuneem on eggs and adults was greater for t. urticae compared to the toxicity on predatory mites. the fecundity of t. urticae was reduced significantly by natuneem in all concentration. on predatory mites significant reduction on its fecundity was found at the highest concentrations evaluated. natuneem was performed better against the twospotted spider mite and exhibited relatively low impact against the predatory mites under the conditions studied.
Occurence and biological aspects of the clitoria tree psyllid in Brazil
Gondim Junior, Manoel Guedes Corrêa;Barros, Reginaldo;Silva, Fernando Rodrigues da;Vasconcelos, Geraldo José Nascimento de;
Scientia Agricola , 2005, DOI: 10.1590/S0103-90162005000300012
Abstract: clitoria fairchildiana (howard) is a tree largely distributed in brazil, used for urban arborization. in april 2001, the psyllid euphalerus clitoriae burckhardt & guajará was reported on this plant in the metropolitan areas of recife, pe, brazil. this report records the occurrence of e. clitoriae and studies some of its biological aspects in this area. with this purpose, c. fairchildiana leaves were sampled weekly, and e. clitoriae nymphs as well as aprostocetus sp. larvae and nymphs were collected and counted. the e. clitoriae population ranged from 2 to 90 nymphs per leaflet. the aprostocetus sp. percentage of parasitism ranged from 3 to 24%. the frequency curve for pygidium width ranged from 120 to 140; 200 to 240; 300 to 380; 460 to 580, and 720 to 820 mm for the first, second, third, fourth, and fifth instars, respectively. the incubation period for e. clitoriae eggs lasted 7.6 days. the nymphal stage lasted 5.7; 4.5; 4.8; 5.0, and 6.1 days for the first, second, third, fourth, and fifth instars, respectively. development time from egg to adult was 33.7 days. female longevity 8.6 days, with a daily fecundity of 118 eggs. the total viability of the immature stage was 74%, and the sex ratio was 0.5.
Biologia do ácaro predador Euseius alatus DeLeon (Acari: Phytoseiidae) em diferentes temperaturas = Biology of predator mite Euseius alatus DeLeon (Acari: Phytoseiidae) under different temperatures
José Wagner da Silva Melo,Cleiton Araújo Domingos,Andreia Serra Galv?o,Manoel Guedes Corrêa Gondim Junior
Acta Scientiarum : Agronomy , 2009,
Abstract: Euseius alatus DeLeon (Acari: Phytoseiidae) é um dos predadores mais comuns em fruteiras no Brasil, alimentando-se de pólen, ácaros e outros pequenos artrópodes. Este predador apresenta ampla distribui o, ocorrendo desde o Rio Grande do Sul até o Ceará. O presente trabalho teve como objetivo avaliar o efeito da temperatura no desenvolvimento e na reprodu o de E. alatus e determinar suas exigências térmicas. O estudo foi conduzido a 18, 21, 24, 27, 30 e33°C, umidade relativa de 70 ± 5% e fotofase de 12h. Nessas temperaturas, o período de ovoadulto durou 14,0; 8,1; 5,5; 4,9; 3,8 e 3,1 dias, respectivamente. Os estágios de ovo, larva, protoninfa, deutoninfa e período de ovo-adulto apresentaram limiares térmicos de 12,52; 13,85; 14,86; 14,86 e 13,31oC e constantes térmicas de 22,32; 14,23; 16,23; 17,3 e 70,16 graus dias. Os valores para os parametros da tabela de vida de fertilidade, analisados em conjunto com os valores das diferentes variáveis de desenvolvimento em diferentes temperaturas, permitiram concluir que a temperatura de 30°C mostrou-se mais adequada ao desenvolvimento e reprodu o de E. alatusem laboratório. Logo, tudo indica que E. alatus encontra melhores condi es de temperatura para se desenvolver em regi es mais quentes do Brasil, como as preponderantes no Nordeste brasileiro. Euseius alatus DeLeon (Acari: Phytoseiidae) is one of the mostcommon predators of tropical fruit trees in Brazil, feeding of pollen, mites and other small arthropods. This predator presents wide distribution, occurring from Rio Grande do Sul to Ceará. This work had as objective to evaluate the effect of temperature on the development and reproduction of E. alatus, in addition to determining their thermal requirements. The study was accomplished at temperatures of 18, 21, 24, 27, 30 and 33°C; relative humidity of 70 ± 5%; and 12-h photophase. At these temperatures, the egg-adult period lasted 14.0; 8.1; 5.5; 4.9; 3.8 and 3.1 days, respectively. The egg, larva, protonymph and deutonymph stages and the egg-adult period presented thermal thresholds of 12.52; 13.85; 14.86; 14.86 and 13.31oC, and thermal constants of 22.32; 14.23; 16.23; 17.3 and 70.16 degrees days. The values for the parameters of the fertility lifetable, analyzed in conjunction with the values of the different variables of development at different temperatures, showed that the temperature of 30oC is the most suitable for development and reproduction of E. alatus in the laboratory. Therefore, is it apparent that the best temperature conditions for the development of E. alatus are found in the warmer regi
Occurence and biological aspects of the clitoria tree psyllid in Brazil
Gondim Junior Manoel Guedes Corrêa,Barros Reginaldo,Silva Fernando Rodrigues da,Vasconcelos Geraldo José Nascimento de
Scientia Agricola , 2005,
Abstract: Clitoria fairchildiana (Howard) is a tree largely distributed in Brazil, used for urban arborization. In April 2001, the psyllid Euphalerus clitoriae Burckhardt & Guajará was reported on this plant in the metropolitan areas of Recife, PE, Brazil. This report records the occurrence of E. clitoriae and studies some of its biological aspects in this area. With this purpose, C. fairchildiana leaves were sampled weekly, and E. clitoriae nymphs as well as Aprostocetus sp. larvae and nymphs were collected and counted. The E. clitoriae population ranged from 2 to 90 nymphs per leaflet. The Aprostocetus sp. percentage of parasitism ranged from 3 to 24%. The frequency curve for pygidium width ranged from 120 to 140; 200 to 240; 300 to 380; 460 to 580, and 720 to 820 mm for the first, second, third, fourth, and fifth instars, respectively. The incubation period for E. clitoriae eggs lasted 7.6 days. The nymphal stage lasted 5.7; 4.5; 4.8; 5.0, and 6.1 days for the first, second, third, fourth, and fifth instars, respectively. Development time from egg to adult was 33.7 days. Female longevity 8.6 days, with a daily fecundity of 118 eggs. The total viability of the immature stage was 74%, and the sex ratio was 0.5.
Bioatividade de formula??es de NIM (Azadirachta indica A. Juss, 1797) e de Bacillus thuringiensis subsp. aizawai em lagartas de Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)
Lima, Marcileyne Pess?a Leite de;Oliveira, José Vargas de;Gondim Junior, Manoel Guedes Corrêa;Marques, Edmilson Jacinto;Correia, Alicely Araújo;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000600004
Abstract: the use of botanical and biological insecticides constitutes a promising alternative to control spodoptera frugiperda on corn crop. thus, the present work evaluated the effect of commercial formulations of neem (natuneem? and neemseto?) and bacillus thuringiensis subsp. aizawai - bta (xentari?) on this pest under laboratory conditions. newly hatched and 10 days old fall armyworm larvae were fed with corn leaves treated with the insecticides at concentration of 2.5, 5.0, 7.5, and 10 ml or g/ml and control (water). an increased effect of the insecticides was found as function of increasing concentration, causing higher larval mortality, longer larval period and lower larval weight. in some cases, reduction of pupa weight, pupa viability and longevity of adults were also verified. newly hatched larvae (ca. 0-24 h old) were more susceptible to 5 and 10 ml or g/l of neemseto? and xentari? as compared with 10 days old larvae. with the increase of insecticide concentration, the effects on the pupa weight and pupa viability were also greater on larvae of 0-24h old.
Biologia do ácaro predador Euseius alatus DeLeon (Acari: Phytoseiidae) em diferentes temperaturas
Melo, José Wagner da Silva;Domingos, Cleiton Araújo;Galv?o, Andreia Serra;Gondim Junior, Manoel Guedes Corrêa;Moraes, Gilberto José de;
Acta Scientiarum. Agronomy , 2009, DOI: 10.4025/actasciagron.v31i3.466
Abstract: euseius alatus deleon (acari: phytoseiidae) is one of the most common predators of tropical fruit trees in brazil, feeding of pollen, mites and other small arthropods. this predator presents wide distribution, occurring from rio grande do sul to ceará. this work had as objective to evaluate the effect of temperature on the development and reproduction of e. alatus, in addition to determining their thermal requirements. the study was accomplished at temperatures of 18, 21, 24, 27, 30 and 33oc; relative humidity of 70 ± 5%; and 12-h photophase. at these temperatures, the egg-adult period lasted 14.0; 8.1; 5.5; 4.9; 3.8 and 3.1 days, respectively. the egg, larva, protonymph and deutonymph stages and the egg-adult period presented thermal thresholds of 12.52; 13.85; 14.86; 14.86 and 13.31oc, and thermal constants of 22.32; 14.23; 16.23; 17.3 and 70.16 degrees days. the values for the parameters of the fertility life table, analyzed in conjunction with the values of the different variables of development at different temperatures, showed that the temperature of 30oc is the most suitable for development and reproduction of e. alatus in the laboratory. therefore, is it apparent that the best temperature conditions for the development of e. alatus are found in the warmer regions of brazil, such as those observed in northeastern brazil.
Toxicidade por fumiga??o, contato e ingest?o de óleos essenciais para Sitophilus zeamais Motschulsky, 1885 (Coleoptera: Curculionidae)
Coitinho, Rodrigo Leandro Braga de Castro;Oliveira, José Vargas de;Gondim Junior, Manoel Guedes Corrêa;Camara, Cláudio Augusto Gomes da;
Ciência e Agrotecnologia , 2011, DOI: 10.1590/S1413-70542011000100022
Abstract: the sitophilus zeamais species is a major pest of stored maize in brazil. the control is made, usually, using measures of hygiene and cleanliness, synthetic insecticides and fumigant protectors. the search for less toxic products, biodegradable and safe from an ecological point of view is very well accepted by society. the objective of this study was to test the toxicity by contact and ingestion and fumigant of essential oils and eugenol natural organic compound for adults of s. zeamais. the values of lc50 in oil from leaves of piper hispidinervum, eugenia uniflora, cinnamomum zeylanicum, p. marginatum, schinus terebinthifolius, melaleuca leucadendron, green fruits of s. terebinthifolius and eugenol compound in tests of contact and ingestion were estimated at 1.0; 11.6, 14.2, 21.1, 57.7, 75.8, 98.8 and 14.8 l/40 g maize, respectively. the toxicity ratios (tr) ranged from 1.3 to 98.8. in the fumigation of adults, the lethal concentrations ranged from 0.53 to 94.7 l/l air, in the following order of toxicity: p. hispidinervum > p. aduncum > s. terebinthifolius > green fruits of s. terebinthifolius > p. marginatum > eugenol, and the tr ranged from 2.0 to 178.7.
Atividade inseticida de óleos essenciais e fixos sobre Callosobruchus maculatus (FABR., 1775) (Coleoptera: Bruchidae) em gr?os de caupi [Vigna unguiculata (L.) WALP.]
Pereira, Adriana Carla Ribeiro Lopes;Oliveira, José Vargas de;Gondim Junior, Manoel Guedes Corrêa;Camara, Cláudio Augusto Gomes da;
Ciência e Agrotecnologia , 2008, DOI: 10.1590/S1413-70542008000300003
Abstract: the weevil callosobruchus maculatus (fabr.) is considered the most important pest of cowpea, vigna unguiculata (l.) walp., stored in tropical and subtropical regions. focusing to minimize the undesired effects of synthetic chemical insecticides, vegetal origin oils are a promissory alternative to control it because of its low cost and safety to the applicator and consumers. essential oils [(cymbopogon martini (roxb.) j.f. watson], piper aduncum l., piper hispidinervum c.dc., melaleuca sp. and lippia gracillis shauer) and fixed oils (helianthus annuus l., sesamum indicum l., gossypium hirsutum l., glycine max (l.) merr. and caryocar brasiliense camb.) were tested in cowpea grains (cv. "sempre verde"). these oils were used in concentrations of 10, 20, 30, 40 and 50ml/20g, corresponding to 0.5, 1.0, 1.5, 2.0 and 2.5 l/t and impregnated to the grains into the plastic recipients using an automatic pipette and handly agitated for two minutes. plots of 20g from cowpea were infested with eight females of c. maculatus from 0 to 48 hours old. each oil was tested separately in a randomly arrangement with six replicates. the essential oils of c. martini, p. aduncum and l. gracillis provoked 100% of mortality in all concentrations, p. hispedinervum from 1.5 l/t and melaleuca sp. in the concentrations of 2.0 and 2.5 l/t. the reduction of the viable eggs and emerged insects was about 100%, except for melaleuca sp. on the other hand, the fixed oils, in spite of its low mortality in all tested concentrations, reduced to almost 100% the number of the viable eggs and emerged insects.
Influência do período de armazenamento do caupi [Vigna unguiculata (L.) Walp.], tratado com óleos essenciais e fixos, no controle de Callosobruchus maculatus (Fabricius, 1775) (Coleoptera, Chrysomelidae, Bruchinae)
Pereira, Adriana Carla Ribeiro Lopes;Oliveira, José Vargas de;Gondim Junior, Manoel Guedes Corrêa;Camara, Cláudio Augusto Gomes da;
Ciência e Agrotecnologia , 2009, DOI: 10.1590/S1413-70542009000100044
Abstract: the secondary compounds extracted from plants are considered potential alternative to synthetic insecticides in the control of agricultural pests. essential oils (cymbopogon martini roxb., piper aduncum l., p. hispidinervum c.dc., melaleuca sp. and lippia gracillis shau) and fixed oils (helianthus annus l., sesamum indicum l., gossypium hirsutum l., glycine max l. and caryocar brasiliense camb.) at the concentration of 50μl/20g were tested according to previous studies. samples of cowpea cv. sempre verde were impregnated with these oils in glass recipients and submitted to manual agitation for two minutes. each plot of 20g was infested with eight females of c. maculatus up to 48 hours old, during four days. the oil efficiency was evaluated right after the impregnation and after 30, 60, 90 and 120 days of storage. in the first evaluation, all essential oils caused 100% of mortality and the fixed oils caused low mortality, varying from 35% (g. hirsutum) to 67,5% (g. max). with longer storage period, there was an increase in the number of viable eggs and emerged insects, except for p. aduncum. among the fixed oils, s. indicum, g. max, g. hirsutum and c. brasiliense were the most efficient up to 30 days of storage. the results showed the low residual effect of the tested oils for the control of c. maculatus, excep p. aduncum, which was efficient throughout the 120 days of storage.
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