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Search Results: 1 - 10 of 221654 matches for " Lúcia Helena Piedade;Haji "
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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.
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.
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.
Ecologia da poliniza??o de Raphiodon echinus (Nees & Mart.) Schauer (Lamiaceae) em Petrolina, PE, Brasil
Dias, Carla Tatiana de Vasconcelos;Kiill, Lúcia Helena Piedade;
Acta Botanica Brasilica , 2007, DOI: 10.1590/S0102-33062007000400022
Abstract: raphiodon echinus is a prostrate weedy species that occurs in the caatinga. in this work, floral biology and reproductive system were observed in order to understand the pollination ecology of this species. observations were made at embrapa semi-árido, in petrolina, pernambuco. for the self-pollination, apomixis, geitonogamy and xenogamy experiments, buds were protected, emasculated, and pollinated when necessary. flowers were tagged to estimate pollination success under natural conditions. floral visitors were observed on different days from 7:30 a.m. to 4:00 p.m., for a total of 45 hours. the violet flowers of r. echinus are infundibuliform and give off a sweet scent; they are grouped in long-pedunculate spherical heads. anthesis is diurnal and is more frequent in the morning around 7:00 a.m. flowers last for about ten hours and the number of flowers that open daily on each inflorescence varies. the flowers are visited by bees and butterflies. centris hyptidis was responsible for 26% of total visits. based on behavior and frequency of visits, this bee was considered to be the effective pollinator of r. echinus. as regards the reproductive system, r. echinus is self-compatible and produces fruits by manual self-pollination (70%), geitonogamy (63%) and xenogamy (40%).
Ecologia da poliniza??o de Ipomoea asarifolia (Ders.) Roem. & Schult. (Convolvulaceae) na regi?o semi-árida de Pernambuco
Kiill, Lúcia Helena Piedade;Ranga, Neusa Taroda;
Acta Botanica Brasilica , 2003, DOI: 10.1590/S0102-33062003000300003
Abstract: the present work was carried out during march/1995 to july/1997, to study aspects of the phenology, pollination and reproduction of ipomoea asarifolia growing at fazenda catalunha, santa maria da boa vista, pe. i. asarifolia is a perennial creeping liana with floration registered in the period of march to october, characterized as a cornucopian pattern of flowering. the flowers are gathered in cymes, with a pink funnel-like corolla with magenta mesopetals working as nectar guides. the anthesis is diurnal (05:30 - 06:00 h) and the flowers lasting for approximately six hours. the amount of nectar secreted by flower is less then 1μl. bees megachilidae and apidae were the main visitors of this convolvulaceae. liturge huberi ducke was considered as effective pollinatior, and acamptopoeum prinii holm. and diadasina riparia ducke as occasional. ipomoea asarifolia is self-incompatible, producing fruits and viable seeds only after crossed pollination. however the tests of pollen tube growth showed that 10 hours after pollination, pollen tubes reached the micropile of both self- and cross-pollinated ovules, suggesting a late acting self-incompatibility system. the germination tests showed that only the seeds obtained in natural conditions (93,3%) and from cross-pollination experiment (100%) were viable, reinforcing the data obtained in the reproduction system.
Biologia reprodutiva e poliniza??o de Jacquemontia nodiflora (Desr.) G. Don (Convolvulaceae) em Caatinga na regi?o de Petrolina, PE, Brasil
Kiill, Lúcia Helena Piedade;Sim?o-Bianchini, Rosangela;
Hoehnea , 2011, DOI: 10.1590/S2236-89062011000400001
Abstract: the main objective of this work was to study aspects of pollination biology, behavior and frequency of flower visitors, reproduction and phenology of jacquemontia nodiflora in caatinga hiperxerófila, petrolina, pe, from march 2004 to march 2005. the phenological data showed that the phenophases of budding, flowering and fruiting occurred mainly during the rainy season, while leaf senescence occured in the dry season, indicating the influence of precipitation in the process. the flowers are grouped in cymes, are small (10mm diameter), shallow-campanulate, white, odorless and secrete small amount of nectar (<1 μl). the anthesis is diurnal, occurring around 5 h 30 min, and the lifetime of the flower is only nine hours. throughout the flowering, the flowers are visited by bees, wasps and flies, and the bees apis mellifera, trigona spinipes and frieseomelitta doederleini are the most frequent visitors (47.7, 26.0 and 12.1% of total visits, respectively). the system of reproduction of j. nodiflora is facultatively autogamous, producing fruit by self-pollination (rates > 90%) and by cross-pollination (75.6%). jacquemontia nodiflora can be considered as an important nectar source for medium and small bees, and a. mellifera, t. spinipes and f. doederleini were considered as pollinators of this species.
Biologia floral e sistema de reprodu??o de Annona squamosa L. (Annonaceae) na regi?o de Petrolina-PE
Kiill, Lúcia Helena Piedade;Costa, Jo?o Gomes da;
Ciência Rural , 2003, DOI: 10.1590/S0103-84782003000500009
Abstract: aspects of pollination biology and reproductive system of annona squamosa l. were studied in petrolina-pe, northeastern brazil, from june 1999 to february 2000, from 6:00 a.m. to 6:00 p.m. the flowers of a. squamosa are hermaphrodite, axillary, with fleshy calyx and corolla forming a floral camera which serves as a shelter, food source and mating place for visitors. the flowers also show light color petals, produce strong and bad odors. the anthesis takes place around 5:00 p.m., the flowers last for approximately two days, and show female phase in the first twenty hours and male phase in the following twenty hours, characterizing dichogamy. carpophilus hemipterus, carpophilus sp and haptoncus ochraceus (nitidulidae) are the main flower visitors and according to frequency, time and behavior, are considered pollinators of this species. the species is self-compatible, however the germination tests indicated that seeds from cross-pollination show higher viability than seeds from geitonogamy.
Biologia floral e sistema reprodutivo de Gliricidia sepium (Jacq.) Steud. (Fabaceae- Papilionoidae) na regi?o de Petrolina, Pernambuco
Kiill, Lúcia Helena Piedade;Drumond, Marcos Ant?nio;
Ciência Rural , 2001, DOI: 10.1590/S0103-84782001000400006
Abstract: the aspects of floral biology and reproductive system of gliricidia sepium were studied from march to october of 1999, from 5:30am to 5:00pm, in an introduced population at embrapa semi-árido, petrolina, in the state of pernambuco, brazil. fifteen plants were marked and observed every two weeks for the study of phenology. for the study of floral biology and morphology, flowers and inflorescences were marked and observed until fruit set. the visitors of flowers were observed during all time of the experiment, when frequency, time and duration of their visits were registered. g. sepium has a cornucopia pattern of flowering and the peak of this phenophase occurs in august. the flowers are grouped in axilar racemes, with centripetal development, and the anthesis occurs at 5 to 45 flowers/day. the flowers have the typical organization of papilionaceae, corolla of magenta color and the central region of flag of cream color, which functions as nectar guide. the anthesis is diurnal, occurring at around 6:00am, and the lifetime of flowers is around 10 hours. apidae and anthophoridae bees and hesperiidae moths are the most frequent visitors. xylocopa griscesens, x. frontalis and eulaema nigrita were considered the main pollinators of this species. g. sepium is a species which produces fruits only after cross-pollination (51.6%).
Biologia floral e sistema de reprodu??o de Jacquemontia multiflora (Choisy) Hallier f. (Convolvulaceae)
Brazilian Journal of Botany , 2000, DOI: 10.1590/S0100-84042000000100004
Abstract: the present study deals with the aspects of phenology, floral biology and reproductive system of jacquemontia multiflora, a caatinga species at the fazenda catalunha, santa maria da boa vista - pe. the species is an annual liana, with cornucopia pattern of flowering. the peak of flowering occurs between the end of march begining of april at the end of the wet season. its cymose inflorescences have the main axes elongated, exposing the flowers well out the foliage leaves. the blue flowers are shallow campanulate, scentless and producing a very low quantity of nectar. anthesis is diurnal, the flowers beggin to open at around 05:30h., are ephemeral, lasting for about nine hours. the most frequent visitors are bees (apidae and halictidae). apis mellifera and trigona spinipes were considered the main pollinators of this species. j. multifora is facultatively autogamous, producing fruits either after self (30%) and cross (60%) manual pollination.
Ecologia da poliniza o de Ipomoea asarifolia (Ders.) Roem. & Schult. (Convolvulaceae) na regi o semi-árida de Pernambuco
Kiill Lúcia Helena Piedade,Ranga Neusa Taroda
Acta Botanica Brasilica , 2003,
Abstract: O presente trabalho foi desenvolvido no período de mar o/1995 a julho/1997, com o objetivo de estudar aspectos da fenologia, poliniza o e reprodu o de Ipomoea asarifolia, na Fazenda Catalunha, Santa Maria da Boa Vista, PE. I. asarifolia é uma liana perene, com hábito exclusivamente rasteiro e flora o registrada no período de mar o a outubro, caracterizada como do tipo cornucópia. As flores est o reunidas em cimeiras, s o infundibuliformes, de cor rosa com as mesopétalas magenta, que funcionam como guias de néctar. A antese é diurna (5:30 e 6:00h) e a dura o das flores é de aproximadamente seis horas. A quantidade de néctar secretada por flor é inferior a 1μl. Abelhas Megachilidae e Apidae foram os principais visitantes desta Convolvulaceae. Liturge huberi Ducke foi considerada polinizador efetivo e Acamptopoeum prinii Holm. e Diadasina riparia Ducke polinizadores ocasionais. Quanto ao sistema de reprodu o, I. asarifolia é autoincompatível, produzindo frutos e sementes viáveis somente após poliniza o cruzada. Os testes de crescimento de tubo polínico mostraram que, após 10 horas, há tubos polínicos na micrópila de óvulos autopolinizados e daqueles submetidos à poliniza o cruzada, sugerindo que se trata de um sistema de incompatibilidade tardia. Os testes de germina o mostraram que somente as sementes obtidas em condi es naturais (93,3%) e nos experimentos de poliniza o cruzada (100%) foram viáveis, refor ando os dados obtidos no sistema de reprodu o.
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