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Controle de Rhyzopertha dominica pela atmosfera controlada com CO2, em trigo
Gon?alves, Rogério Amaro;Santos, Jamilton Pereira;Chandra, Prabir Kumar;Germani, Rogério;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000100001
Abstract: controlled atmosphere with inert gases offers an alternative to phosphine use to control stored grain pests. the objective of this research was to test a controlled atmosphere with co2 to control rhyzoperta dominica, (fabr.) (coleoptera: bostrichidae), an important pest of stored wheat grain. this test consisted of five co2 concentrations ( 0, 30, 40, 50 and 60%; completed with n2), fumigation periods of 5, 10 and 15 days; insect populations collected from campo mour?o, pr, sete lagoas, mg and santa rosa, rs, in brazil and seven developing stages (egg, larva of 1st, 2nd, 3rd and 4th instar, pupa and adult), in three replications. all the different life stages of the insect were kept as individual samples in a small voile cloth bag and put inside a 200 liter fumigation chamber with 75% of this volume full of grain with the metal lid sealed at the edge with silicone rubber to guarantee hermetic conditions. the different co2 concentrations were then added inside the chambers. the results showed that all co2 concentrations tested caused 100% mortality to all adult stage of the three insect populations in all fumigation periods tested. the mortality of the pupa stage of the three insect population was 100% when the 60% co2 concentration was used in the 15 days fumigation period; however, all co2 concentrations in 15 days fumigation period caused 100% mortality in pupa of insects collected in santa rosa. for adequate control of all larval stages it requires 50% co2 or above this concentration. during the 10 and 15 days fumigation periods all co2 concentrations controlled 100% of the eggs from the three populations studied.
Controle de Rhyzopertha dominica pela atmosfera controlada com CO2, em trigo  [cached]
Gon?alves Rogério Amaro,Santos Jamilton Pereira,Chandra Prabir Kumar,Germani Rogério
Pesquisa Agropecuária Brasileira , 2000,
Abstract: A utiliza o de gases inertes como fumigantes no controle de pragas é uma alternativa ao uso de fosfina. O objetivo deste trabalho foi avaliar a eficiência de uma atmosfera com CO2 no controle de Rhyzoperta dominica (Fabr.) (Coleoptera: Bostrichidae) em gr os de trigo armazenado. O trabalho constou de cinco concentra es de CO2 (0, 30 , 40, 50 e 60%, completadas com N2), três períodos de exposi o (5, 10, 15 dias), três popula es de R. dominica (Fabr.) (Coleoptera: Bostrichidae) (Campo Mour o, PR, Sete Lagoas, MG e Santa Rosa, RS) e sete fases de desenvolvimento do inseto (ovo, larva de 1o, 2o, 3o e 4o ínstar, pupa e adulto) com três repeti es. As diferentes fases da R. dominica foram acondicionadas em tecido organza e levadas para camaras de expurgo de 200 litros com 75% deste volume repletos de gr os. As camaras foram vedadas com borracha de silicone para garantir a hermeticidade. Após a veda o das camaras injetavam-se os gases contendo diferentes teores de CO2. Os resultados mostraram que todos os teores de CO2 causaram 100% de mortalidade de adultos das três popula es nos três períodos de exposi o utilizados. Em pupas a mortalidade atingiu 100% no teor de 60% de CO2 para as três popula es no período de 15 dias de exposi o; porém, todos os teores de CO2 utilizados no período de 15 dias de exposi o causaram 100% de mortalidade das pupas da popula o de Santa Rosa. Para o adequado controle de larvas de diferentes ínstares s o necessários teores de CO2 iguais ou acima de 50%. Nos períodos de 10 e 15 dias de exposi o, todos os teores de CO2 causaram 100% de mortalidade dos ovos das três popula es avaliadas.
Cama de Broiler y Grano de Cebada Entero o Molido en Raciones de Engorda Invernal de Novillos Broiler Litter and Whole or Milled Barley Grain in Winter Steer Fattening Rations
Claudio Rojas G,Moisés Manríquez B
Agricultura Técnica , 2007,
Abstract: El estudio tuvo el objetivo de evaluar la respuesta animal al consumo de raciones de engorda formuladas con cama de broiler y grano de cebada (Hordeum vulgare L.) entero o molido incorporado al ensilaje de praderas de ballica-trébol blanco (Lolium perenne L.-Trifolium repens L.) al momento de su elaboración. Los tratamientos fueron: 1) ensilaje, cama de broiler y grano de cebada molido, mezclados al momento de la alimentación invernal; 2) ensilaje adicionado con cama de broiler al momento de ensilar y grano de cebada molido adicionado al momento de la alimentación invernal; 3) ensilaje adicionado con cama de broiler y grano de cebada molido al momento de ensilar; y 4) ensilaje adicionado con cama de broiler y grano de cebada entero al momento de ensilar. Los incrementos diarios de PV fueron de 1,086; 1,099; 1,074 y 1,111 kg animal-1 (P ≥ 0,05); el consumo de alimentos de 8,7; 8,7; 8,4 y 8,4 kg MS animal-1 y las eficiencias de conversión de alimentos de 8; 7,9; 7,9 y 7,5 kg MS alimento consumido kg-1 incremento PV para los tratamientos 1, 2, 3 y 4, respectivamente. Se concluye que la incorporación de cama de broiler sola o con grano de cebada al ensilaje de praderas, al momento de su confección, no afecta el consumo ni los incrementos de PV de los novillos y la incorporación de grano de cebada entero o molido al momento de realizar el ensilaje, produce respuestas similares en los novillos. The objective of this study was to evaluate the animal response to feeding with fattening rations which included ryegrass-white clover (Lolium perenne L.-Trifolium repens L.) pasture silage, broiler litter, and milled or whole barley (Hordeum vulgare L) grain.. Treatments were 1) pasture silage based ration with broiler litter and milled barley supplemented at the time of winter feeding; 2) pasture silage based ration with broiler litter incorporated to the silo at the date of conservation and milled barley supplemented at feeding time; 3) pasture silage based ration with broiler litter and milled barley incorporated into the silo at the date of conservation; and 4) pasture silage based ration with broiler litter and whole barley grain incorporated to the silo at ensiling. Daily LW gains (LWG) were 1.086, 1.099, 1.074 and 1.111 kg animal-1 (P ≥ 0.05); feed consumption were 8.7, 8.7, 8.4 and 8.4 kg DM animal-1 and feed conversion of 8, 7.9, 7.9 and >7.5 kg DM feed kg-1 LW gain, for the treatments 1, 2, 3 y 4, respectively. It was concluded that incorporating broiler litter alone or with barley grain in the silage at the ensiling moment did not affect daily LWG and feed
The distribution of seagrasses in Dominica, Lesser Antilles  [cached]
S.C.C Steiner,K.J Macfarlane,L.M Price,D.A Willette
Revista de Biología Tropical , 2010,
Abstract: Seagrass beds are the largest organism-built marine habitat in Dominica, yet have only been surveyed since 2007. Standardized examinations along a depth gradient between 0 and 24m, focusing on magnoliophyte species composition and benthic cover of shoots at 17 seagrass bed sites, were carried out between September 10 and December 7, 2008. The Cymodoceaceae Syringodium filiforme (Kuetzing 1860) and Halodule wrightii (Ascherson 1868), as well as the Hydrocharitaceae Halophila decipiens (Ostenfeld 1902), H. stipulacea (Fosskal & Ascherson 1867) and Thalassia testudinum (Banks ex K nig 1805) displayed distinct regional and horizontal distribution patterns. Syringodium filiforme is the island’s dominant seagrass along the western and northern coasts, occurring at depths between 2 and 18m and with a mean benthic cover ranging from 0.9-10% along the West coast. Along the North coast it grew between 0.2 and 1m depth with a mean maximum benthic cover of 48.9%. Halodule wrightii grew along the North and West coasts, in depths between 1 and 14m in areas of recent and chronic disturbances. Its delicate morphology and sparse benthic cover (<0.1%) did not constitute seagrass beds. Halophila decipiens grew along the deep, shallow and lateral margins of west coast S. filiforme beds and monospecifically in depths between 3 and 24m. Halophila stipulacea, an invasive species, was widespread along 45km of the West coast and was found in depths between 5 and 24m. Both Halophila species formed extensive beds at depths beyond the survey limit of 24m thus playing a potentially important role in the resettlement of shallow areas after storms. H. decipiens and H. stipulacea are currently the second and third most common seagrasses on the island respectively, despite their absence along the North coast. T. testudinum was confined to North coast’s sheltered reef flats at depths 1m or less with mean a benthic cover ranging from 2 to 76%. It grew monospecifically in the most turbulent and in the calmest locations, yet intermixed with S. filiforme in areas of moderate turbulence. Strong surge along the West coast (October 15-16, 2008), associated with Hurricane Omar, caused uprooting and burial of seagrass beds in varying degrees, in particular along the shallow margins between 2 and 10m depth. This event also demonstrated the dynamic nature of Dominica’s shallow seagrass bed margins and the resistance level of individual beds to storm disturbances. Rev. Biol. Trop. 58 (Suppl. 3): 89-98. Epub 2010 October 01. Pastos marinos son los ambientes más grandes constituidos por organismos en
The distribution of seagrasses in Dominica, Lesser Antilles
Steiner,S.C.C; Macfarlane,K.J; Price,L.M; Willette,D.A;
Revista de Biología Tropical , 2010,
Abstract: seagrass beds are the largest organism-built marine habitat in dominica, yet have only been surveyed since 2007. standardized examinations along a depth gradient between 0 and 24m, focusing on magnoliophyte species composition and benthic cover of shoots at 17 seagrass bed sites, were carried out between september 10 and december 7, 2008. the cymodoceaceae syringodium filiforme (kuetzing 1860) and halodule wrightii (ascherson 1868), as well as the hydrocharitaceae halophila decipiens (ostenfeld 1902), h. stipulacea (fosskal & ascherson 1867) and thalassia testudinum (banks ex k?nig 1805) displayed distinct regional and horizontal distribution patterns. syringodium filiforme is the island’s dominant seagrass along the western and northern coasts, occurring at depths between 2 and 18m and with a mean benthic cover ranging from 0.9-10% along the west coast. along the north coast it grew between 0.2 and 1m depth with a mean maximum benthic cover of 48.9%. halodule wrightii grew along the north and west coasts, in depths between 1 and 14m in areas of recent and chronic disturbances. its delicate morphology and sparse benthic cover (<0.1%) did not constitute seagrass beds. halophila decipiens grew along the deep, shallow and lateral margins of west coast s. filiforme beds and monospecifically in depths between 3 and 24m. halophila stipulacea, an invasive species, was widespread along 45km of the west coast and was found in depths between 5 and 24m. both halophila species formed extensive beds at depths beyond the survey limit of 24m thus playing a potentially important role in the resettlement of shallow areas after storms. h. decipiens and h. stipulacea are currently the second and third most common seagrasses on the island respectively, despite their absence along the north coast. t. testudinum was confined to north coast’s sheltered reef flats at depths 1m or less with mean a benthic cover ranging from 2 to 76%. it grew monospecifically in the most turbulent and in the
Crecimiento y desarrollo de cebada y trigo  [cached]
Ma. Claudia Castau00F1eda Saucedo,Cu00E1ndido Lu00F3pez Castau00F1eda,Juan Molina Moreno,Teresa B. Colinas Leu00F3n
Revista fitotecnia mexicana , 2004,
Abstract: Se estudió la variación en características del área foliar en plántula y etapas fenológicas entre genotipos de cebada y trigo, y entre especies en un experimento de campo en invierno-primavera 1999-2000 (ECIP) y otro de invernadero en verano-oto o 2000 (EIVO) en Montecillo, Edo. de México. Se utilizaron siete líneas F6 y tres variedades comerciales de cebada y trigo en un dise o de bloques completos al azar con cuatro repeticiones. En el ECIP, el cociente de área foliar (CAF, 0.18 cm2 g-1) y el área foliar específica (AFE, 0.25 cm2 mg-1), en promedio de todos los genotipos, fueron menores que en el EIVO (CAF, 0.35 cm2 g-1 y AFE, 0.48 cm2 mg-1). Los grados día (GD) a iniciación floral (IF, 352 oCd), espiguilla terminal (ET, 623 oCd) de trigo o máximo número de primordios de cebada (MNP) y antesis (A, 1320 oCd) fueron más altos en el ECIP que en el EIVO (IF, 221 oCd; ET o MNP, 325 oCd; A, 839 oCd), mientras que los GD a madurez fisiológica (MF, 2003 oCd) y madurez comercial (MC, 2211 oCd) fueron más bajos en el ECIP que en el EIVO (MF, 2100 oCd y MC, 2451 oCd). Los genotipos de cebada tuvieron mayores CAF (0.21 cm2 g-1) y AFE (0.29 cm2 mg-1) que los de trigo (CAF, 0.15 cm2 g-1 y AFE, 0.21 cm2 mg-1) en el ECIP; lo mismo ocurrió en el EIVO (cebada: CAF, 0.37 cm2 g-1 y AFE, 0.53 cm2 mg-1; trigo: CAF, 0.32 cm2 g-1 y AFE 0.43 cm2 mg-1). El más rápido crecimiento del área foliar y menor duración para las etapas fenológicas, se podrían utilizar para seleccionar genotipos de cebada o trigo con mayor capacidad de reducir las perdidas de humedad por evaporación directa del suelo en etapas iniciales de desarrollo del cultivo.
Spatial and Temporal Clustering of Chikungunya Virus Transmission in Dominica  [PDF]
Elaine O. Nsoesie?,R. Paul Ricketts?,Heidi E. Brown?,Durland Fish?,David P. Durham?,Martial L. Ndeffo Mbah?,Trudy Christian?,Shalauddin Ahmed?,Clement Marcellin?,Ellen Shelly
PLOS Neglected Tropical Diseases , 2015, DOI: 10.1371/journal.pntd.0003977
Abstract: Using geo-referenced case data, we present spatial and spatio-temporal cluster analyses of the early spread of the 2013–2015 chikungunya virus (CHIKV) in Dominica, an island in the Caribbean. Spatial coordinates of the locations of the first 417 reported cases observed between December 15th, 2013 and March 11th, 2014, were captured using the Global Positioning System (GPS). We observed a preponderance of female cases, which has been reported for CHIKV outbreaks in other regions. We also noted statistically significant spatial and spatio-temporal clusters in highly populated areas and observed major clusters prior to implementation of intensive vector control programs suggesting early vector control measures, and education had an impact on the spread of the CHIKV epidemic in Dominica. A dynamical identification of clusters can lead to local assessment of risk and provide opportunities for targeted control efforts for nations experiencing CHIKV outbreaks.
Attitudes towards mental illness in the Commonwealth of Dominica
Kohn,Robert; Sharma,David; Camilleri,Christopher P.; Levav,Itzhak;
Revista Panamericana de Salud Pública , 2000, DOI: 10.1590/S1020-49892000000300002
Abstract: little is known about the perception of mental illness in the english-speaking caribbean. this study was conducted in 1995 to determine the attitudes, knowledge, and help-seeking practices for emotional disorders in the commonwealth of dominica. two groups in dominica were surveyed: 67 community leaders, consisting of nurses, teachers, and police officers; and 135 community members grouped into five socioeconomic strata that were collapsed to three for the analysis. all the respondents were asked to identify and suggest management of individuals with psychosis, alcoholism, depression, and childhood hyperactivity, as depicted in case vignettes. the person in the psychosis vignette was diagnosed as suffering from mental illness by 84.0% of the leaders and by 71.2% of the community members. however, in each of the three other vignettes, fewer than 30% of the respondents thought that mental illness was present. the person with alcoholism was viewed as having a serious problem by only slightly more than half of the respondents. fewer than half of the respondents thought that the individuals with depression or hyperactivity had serious problems. the community leaders did somewhat worse in recognizing mental illness than did the community members. respondents were most likely to refer a family member with emotional problems to a medical practitioner. in conclusion, education about mental health problems is needed in dominica. especially disconcerting was the lack of knowledge on mental illness among nurses, teachers, and police officers, that is, professionals directly involved in the pathway to care.
A recalcitrant plantation colony : Dominica, 1880-1946
Cecilia Green
New West Indian Guide , 1999,
Abstract: Study of the class and gender dialectics in Dominica during one of its boom-bust cycles of plantation economy. This cycle encompassed the state sponsorship and rise and decline of the lime industry and planter class; the subsequent coming into prominence on the peasantry in Dominica's political economy and in Colonial Office policy; the masculinist recoding of peasant proprietorship and production forms; and shifting roles and agency of women.
Ecotourism, in Dominica: Studying the Potential for Economic Development, Environmental Protection and Cultural Conservation  [PDF]
Vanessa Slinger-Friedman
Island Studies Journal , 2009,
Abstract: Over the last 20 years, the government of the small Caribbean island nation of Dominica has pursued the development of ecotourism on the island. The hope is that this industry will promote dispersed economic development while providing environmental protection and cultural conservation. However, not enough has been done to determine whether or not the industry is achieving the desired results. To this end, this study explores the growth of the tourism industry on Dominica and shows that, while not perfect, ecotourism is providing some definite benefits to the island in this regard.
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