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Search Results: 1 - 10 of 14491 matches for " Chocorosqui Viviane Ribeiro "
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Nymph and Adult Performance of the Small Green Stink Bug, Piezodorus guildinii (Westwood) on Lanceleaf Crotalaria and Soybean
Panizzi, Ant?nio Ricardo;Cardoso, Shirlei Regina;Chocorosqui, Viviane Ribeiro;
Brazilian Archives of Biology and Technology , 2002, DOI: 10.1590/S1516-89132002000100009
Abstract: lanceleaf crotalaria, crotalaria lanceolata e. mey (leguminosae) was found hosting the small green stink bug, piezodorus guildinii (westwood), in paraná state, brazil. in the laboratory, nymphs showed less mortality when fed on immature pods of crotalaria (64%) than when fed on immature pods of soybean, glycine max (l.) merrill (88%). from 2nd stadium to adult, nymphs required less time to complete development on crotalaria (mean of females and males = 18.4 days) than on soybean (21.5 days). fresh body weight at adult emergence was greater on crotalaria (mean of females and males = 51.4 mg) than on soybean (42.2 mg). adult p. guildinii tended to live longer on crotalaria than on soybean. mean adult longevity was 34.6 days on crotalaria, and 28.8 days on soybean. however, the reproductive performance of females, although similar on both foods, tended to be greater on soybean. these results indicated that p. guildinii was able to develop and reproduce on the wild host lanceleaf crotalaria. compared to soybean, this weed plant was more suitable for nymph development, and equally suitable for adult reproduction.
Nymph and Adult Performance of the Small Green Stink Bug, Piezodorus guildinii (Westwood) on Lanceleaf Crotalaria and Soybean
Panizzi Ant?nio Ricardo,Cardoso Shirlei Regina,Chocorosqui Viviane Ribeiro
Brazilian Archives of Biology and Technology , 2002,
Abstract: Lanceleaf crotalaria, Crotalaria lanceolata E. Mey (Leguminosae) was found hosting the small green stink bug, Piezodorus guildinii (Westwood), in Paraná State, Brazil. In the laboratory, nymphs showed less mortality when fed on immature pods of crotalaria (64%) than when fed on immature pods of soybean, Glycine max (L.) Merrill (88%). From 2nd stadium to adult, nymphs required less time to complete development on crotalaria (mean of females and males = 18.4 days) than on soybean (21.5 days). Fresh body weight at adult emergence was greater on crotalaria (mean of females and males = 51.4 mg) than on soybean (42.2 mg). Adult P. guildinii tended to live longer on crotalaria than on soybean. Mean adult longevity was 34.6 days on crotalaria, and 28.8 days on soybean. However, the reproductive performance of females, although similar on both foods, tended to be greater on soybean. These results indicated that P. guildinii was able to develop and reproduce on the wild host lanceleaf crotalaria. Compared to soybean, this weed plant was more suitable for nymph development, and equally suitable for adult reproduction.
Danos do percevejo barriga-verde Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) em trigo
Manfredi-Coimbra, Silvana;Silva, Jovenil José da;Chocorosqui, Viviane Ribeiro;Panizzi, Ant?nio Ricardo;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000600003
Abstract: the objective of this study was to evaluate the reaction of two cultivars of wheat to the damage caused by adults of the green belly stink bug, dichelops melacanthus (dallas), confined on the culture from the beginning of tillering. the effect of different infestation levels (0, 2, 4, 8 and 16 bugs m-2) on the number of tillers m-2, number of spikes m-2, weight of 1,000 seeds (g), and yield (kg ha-1) was evaluated on wheat cvs. ?br 18' and ?brs 193', in londrina, paraná state. the number of tillers m-2 increased linearly on ?br 18' and in a quadratic form on ?brs 193', with the increase of the number of bugs m-2; the number of spikes m-2, the weight of 1,000 seeds, and the yield decreased linearly with the increase of the infestation level on both cultivars. ?brs 193' was the most susceptible to the attack of d. melacanthus, showing a reduction of 254.4kg for each unit of increase in the number of bugs m-2.
Danos do percevejo barriga-verde Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) em trigo
Manfredi-Coimbra Silvana,Silva Jovenil José da,Chocorosqui Viviane Ribeiro,Panizzi Ant?nio Ricardo
Ciência Rural , 2005,
Abstract: O objetivo deste estudo foi avaliar a rea o de dois cultivares de trigo aos danos causados por percevejos adultos de Dichelops melacanthus (Dallas), confinados sobre a cultura a partir do início do perfilhamento. Foram comparados os efeitos de diferentes níveis de infesta o (0, 2, 4, 8 e 16 percevejos m-2) sobre o número de perfilhos m-2, número de espigas m-2, peso de mil sementes (g) e rendimento (kg ha-1) das cultivares ?BR 18' e ?BRS 193' de trigo, em Londrina, PR. O número de perfilhos m-2 cresceu linearmente para a cv. ?BR 18' e de forma quadrática para a cv. ?BRS 193' com o aumento do número de percevejos m-2; o número de espigas m-2, o peso de mil sementes, e o rendimento decresceram de forma linear com o aumento do nível de infesta o para as duas cultivares. ?Acv.BRS 193' foi mais suscetível ao ataque de D. melacanthus, apresentando uma redu o de 254,4kg para cada unidade de aumento no número de percevejos m-2.
Preda??o de pupas de Alabama argillacea (Hübner) (Lepidoptera: Noctuidae) por larvas e adultos de Calosoma granulatum Perty (Coleoptera: Carabidae) em laboratório
Chocorosqui, Viviane R.;Pasini, Amarildo;
Anais da Sociedade Entomológica do Brasil , 2000, DOI: 10.1590/S0301-80592000000100008
Abstract: the predation capacity of larvae and adults of calosoma granulatum perty on alabama argillacea (hübner) pupae was studied under laboratory conditions. in the first experiment, each larva of c. granulatum (n=18) was provided with five pupae of a. argillacea per day; in the second experiment, five pupae per day were given to each c. granulatum adult (n= five males and five females). their predation rate was 1.8 pupae per day. the highest level of predation occurred from the end of the second instar to the beginning of the third instar. their predation rate for adults was 1.5 and 1.7 larvae per day, for males and females, respectively. there was no significant difference between male and female predation capacity in all evaluations. these results indicate that c. granulatum larvae and adults may prey on relatively high numbers of a. argillacea pupae, and therefore, the preservation of this predator on cultivated areas is essential to reduce the number of insecticide sprays and, consequently, the cost of production per hectare.
Nymph and adult biology of Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) feeding on cultivated and non-cultivated host plants
Chocorosqui, Viviane R.;Panizzi, Ant?nio R.;
Neotropical Entomology , 2008, DOI: 10.1590/S1519-566X2008000400001
Abstract: the biology of the pentatomid dichelops melacanthus (dallas) feeding on cultivated and non-cultivated plants was studied in the laboratory. nymph mortality varied from ≈ 60 on corn (seed mature) to 77% on wheat (ear immature); no nymphs survived on seedlings of corn or wheat. nymph developmental time on soybean, corn or wheat (seed, pod or ear) varied from 25.5 to 32.8 days. body weight at adult emergence was similar and greater on most foods than on wheat ear. nymphs fed preferentially on soybean (pod immature). on non-cultivated hosts, nymphs showed high mortality (73%) on crotalaria (pod immature); on tropical spiderwort (stem) all nymphs died. nymphs took longer time to develop on crotalaria and/or on spiderwort than on soybean. body weight at adult emergence did not differ on crotalaria or soybean. survivorship decreased with time on most foods, with ≈50% of adults alive at day 30. on corn and wheat seedlings ≈80% of adults were dead on day 20. adult longevity ranged 31-43 days, except on corn and wheat seedlings < 15 days. females % ovipositing peaked (≈76%) on soybean (pod or seed immature), and was minimum (≈9%) on wheat ear (immature); no females reproduced on seedlings of corn or wheat. preoviposition period was shorter (≈12 days) on soybean (immature pod or seed) and longer (≈37 days) on wheat (ear immature). fecundity was similar and higher on all foods than on wheat (ear immature). body weigh gain occurred on all foods, but on corn and wheat seedlings. adults fed preferably on soybean (pod immature and seed mature); wheat (seedling) was the least preferred food.
Impact of cultivation systems on Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) population and damage and its chemical control on wheat
Chocorosqui, Viviane R.;Panizzi, Ant?nio R.;
Neotropical Entomology , 2004, DOI: 10.1590/S1519-566X2004000400014
Abstract: results of field evaluations indicated that the neotropical pentatomid dichelops melacanthus (dallas) is associated with wheat, triticum aestivum l. in the no-tillage cultivation system, adults and nymphs were mostly found on the soil, near the plant stems and underneath crop residues of the preceding summer crop, usually soybean, glycine max (l.) merrill, or corn, zea mays l. wheat grown under the conventional cultivation system showed minimal bug attack. d. melacanthus caused substantial damage to no-tillage wheat plants, particularly to seedlings. bug attack reduces the number of seed heads of up to 34%. seed yield was reduced in 31% due to the bugs' feeding, compared to plants free of damage. all developmental phases of the wheat plant were susceptible to the attack of d. melacanthus, and the greatest yield reduction occurred from stem elongation (26.5%) to milky grain stage (33.1%). seed treatment using insecticides was efficient, greatly reducing the grain production losses.
Unusual Oviposition Behavior by a Seed Feeding Bug (Heteroptera: Rhopalidae)
PANIZZI, ANT?NIO R.;HIROSE, EDSON;CHOCOROSQUI, VIVIANE R.;
Neotropical Entomology , 2002, DOI: 10.1590/S1519-566X2002000300021
Abstract: jadera choprai g?llner-scheiding (heteroptera: rhopalidae) feeds on the ground on mature seeds of cardiospermum halicacabum (l.) (sapindaceae). laboratory observations indicated that females dug a hole of ca. 0.5 cm in the the soil with the forelegs, laid eggs, and covered them with lose soil. in artificial conditions, females buried the eggs in over 60 % of the ovipositions, and nymphs were able to reach the soil surface from eggs buried 4 cm. this oviposition behavior is rare among seed suckers heteropterans, that usually oviposit on host plants.
Control of Hypothenemus hampei (FERRARI) on yards for coffee drying / Controle da broca-do-café (Hypothenemus hampei) FERRARI em terreiros de secagem de café
Alex Sandro Keniti Okumura,Pedro Manuel Oliveira Janeiro Neves,Anelize Fernanda Possagnolo,Viviane R. Chocorosqui
Semina : Ciências Agrárias , 2003,
Abstract: The coffee borer (Hypothenemus hampei), one of the main pests affecting coffee fruits under favorable conditions for development, can contribute to a reduction in productivity. The control of this insect is basically chemical, causing environmental, food and farmer contamination. Thus, alternatives must be found to reduce the use of chemical insecticides in the control of this insect. The objective of this work was to analyze, in a coffee drying area: 1) the capture efficiency of traps placed at different heights: 0, 35 and 70 cm; 2) the period of greatest collection (0 to 96 hrs) and 3) the effect of Beauveria bassiana spraying, in two concentrations, on the coffee fruits. Traps were placed around the area, and the insects were collected at 24, 48, 72,and 96 hours. At the same time, the drying fruits were sprayed with two concentrations of B. bassiana to evaluate the mortality rate caused by the fungus found in the emerged borer. Results showed no significant difference regarding the capture of the insects in the traps placed at different heights, and the 48 hour interval registered the highest number of borers collected. The highest fungus concentration (1 x 1011 canidia/ml) caused a mortality rate, attested by B. bassiana of approximately 50% of the emerged borers. A broca-do-cafeeiro (Hypothenemus hampei) é uma das principais pragas pelo ataque aos frutos que, sob condi es favoráveis ao seu desenvolvimento, pode contribuir para redu o da produtividade. O principal método de controle deste inseto é químico, provocando a contamina o ambiental dos alimentos e do agricultor. Assim, alternativas devem ser pesquisadas visando diminuir o uso de inseticidas químicos. O objetivo deste trabalho foi analisar, no terreiro de secagem, a eficiência de captura das armadilhas em diferentes alturas (0, 35 e 70 cm); o período de maior captura (0-96 h) e o efeito da pulveriza o de Beauveria bassiana, em duas concentra es, sobre os frutos de café, visando o controle da broca. As armadilhas foram distribuídas em volta do terreiro, sendo os insetos coletados às 24, 48, 72 e 96 horas. Paralelamente, foram pulverizadas, nos frutos em secagem no terreiro, duas concentra es de B. bassiana avaliando-se a mortalidade provocada pelo fungo nas brocas emergidas. Os resultados obtidos mostraram que n o houve diferen a significativa quanto à captura dos insetos nas diferentes alturas das armadilhas e no intervalo de 24-48 horas foi coletado o maior número de brocas. A maior concentra o do fungo (1 x 1011 conídios/ml) promoveu mortalidade confirmada por B. bassiana de aproxim
O texto híbrido de Anzaldúa e a re-escrita de Hinojosa: contribui es para uma reflex o sobre uma tradu o dos atravesados
Thaís Ribeiro Bueno,Viviane Veras
Tradu??o & Comunica??o : Revista Brasileira de Tradutores , 2011,
Abstract: De que formas a tradu o pode ser relacionada ao processo de choque de culturas e à emergência do hibridismo linguístico presente em regi es de fronteira – mais especificamente, no contexto da cultura chicana que tem se desenvolvido de maneira política e socialmente conflituosa na regi o da fronteira entre México e Estados Unidos? Com base em conceitos formulados por autores das linhas pósestruturalista (a diffèrance de Jacques Derrida, e a tradu o ética de Antoine Berman) e pós-colonialista (o sujeito híbrido em Homi Bhabha e a tradu o como resistência proposta por Tejaswini Niranjana), busca-se avaliar em que medida a tradu o pode assumir papéis relevantes na constante reformula o das identidades dos sujeitos emergentes nos entre-lugares e em discursos fronteiri os. A análise terá como foco a linguagem híbrida presente em duas obras representativas da literatura chicana: Borderlands/La Frontera – The New Mestiza, escrita por Gloria Anzaldúa e publicada em 1987, e Mi Querido Rafa, de autoria do chicano Rolando Hinojosa, escrito em 1981. A partir de reflex es sobre as (im)possibilidades de tradu o que a obra de Anzaldúa oferece e a experiência de autotradu o de Rolando Hinojosa, é possível considerar a fronteira um lugar privilegiado para pensar as constantes reformula es e negocia es (quase sempre social e politicamente violentas) e pensar o ato tradutório como uma rede complexa de opera es, na qual est o em jogo quest es políticas, poder e subjetividades.
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