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EFEITO DA TEMPERATURA NO PARASITISMO DE Trichogramma pretiosum Riley, 1879 SOBRE OVOS DE Sitotroga cerealella (Olivier, 1819)
INOUE, M.S.R.;PARRA, J.R.P.;
Scientia Agricola , 1998, DOI: 10.1590/S0103-90161998000200009
Abstract: the effect of temperature was evaluated on egg parasitization of the angoumois grain moth, sitotroga cerealella (olivier, 1819), by trichogramma pretiosum riley, 1879 as a basis for mass production of t. pretiosum or biological control of s. cerealella in stored corn t. pretiosum parasitization was studied under six constant temperatures (18, 20, 22, 25, 30, and 32°c) and was evaluated through the counting number of darkened eggs (parasitization characteristic) and the number of emerged parasitoids. the highest temperatures were the best for t. pretiosum parasitization. at 30°c, 97.6% of the females were effective on parasitization with an average of 18.8 s. cerealella eggs per female during the first 48 h period and a high parasitoid emergence (88.5%).
EFEITO DA TEMPERATURA NO PARASITISMO DE Trichogramma pretiosum Riley, 1879 SOBRE OVOS DE Sitotroga cerealella (Olivier, 1819)  [cached]
INOUE M.S.R.,PARRA J.R.P.
Scientia Agricola , 1998,
Abstract: Avaliou-se o efeito da temperatura no parasitismo de Trichogramma pretiosum Riley, 1879 sobre ovos de Sitotroga cerealella (Olivier, 1819), para sua utiliza o em cria es massais e/ou para o controle biológico desta tra a de gr os armazenados. Os parasitóides foram mantidos sob as temperaturas de 18, 20, 22, 25, 30 e 32°C, durante 48 horas, com umidade relativa de 60±10% e fotofase de 14 horas, em todas as condi es. O parasitismo foi avaliado pela contagem do número de ovos pretos (característica do parasitismo) e pelo número de parasitóides emergidos. As altas temperaturas foram favoráveis ao desempenho de T. pretiosum que, a 30°C teve 97,6% das fêmeas parasitando, com uma média de 18,8 ovos parasitados em 48 horas e com uma viabilidade de 88,5%.
Parasitism Capacity of Trichogramma pretiosum and Trichogramma acacioi (Hym.: Trichogrammatidae) on eggs of Sitotroga cerealella (Lep.: Gelechiidae)
Pratissoli, Dirceu;Zanuncio, José Cola;Vianna, Ulysses Rodrigues;Andrade, Josimar Souza;Zinger, Fernando Domingo;Alencar, Jo?o Rafael de Conte Carvalho de;Leite, Germano Le?o Demolin;
Brazilian Archives of Biology and Technology , 2008, DOI: 10.1590/S1516-89132008000600021
Abstract: the objective of this work was to evaluate the parasitism capacity of trichogramma pretiosum riley and t. acacioi brun, moraes and soares (hymenoptera: trichogrammatidae) in eggs of the alternative host sitotroga cerealella (olivier) (lepidoptera: gelechiidae) aiming to use both species in biological control programs of nipteria panacea tierry-mieg (lepidoptera: geometridae). the parasitism rhythm and total parasitism of these parasitoid species were affected by the temperature with higher values during the first 24 h of their life. parasitism period was longer for t. pretiosum and t. acacioi at the lowest temperature.
Parasitismo e superparasitismo de Trichogramma pretiosum Riley(Hymenoptera: Trichogrammatidae) em ovos de Sitotroga cerealella(Oliver) (Lepidoptera: Gelechiidae)
Moreira, Marciene D;Santos, Maria C F dos;Beserra, Eduardo B;Torres, Jorge B;Almeida, Raul P de;
Neotropical Entomology , 2009, DOI: 10.1590/S1519-566X2009000200011
Abstract: the parasitoid trichogramma has been used worldwide as biological control agent due to its wide geographic distribution, high specialization and efficacy against many lepidopteran pests. biological and behavioral traits of trichogramma pretiosum riley parasitizing sitotroga cerealella (oliver) eggs were studied aiming to a better understanding of the results from parasitism and superparasitism. the variables investigated were: host acceptance and contact time by t. pretiosum on parasitized host, percentage of parasitoid emergence, number of deformed individuals produced, egg-adult period, sex ratio, offspring female body size and longevity, and number of s. cerealella eggs parasitized/female. parasitism rejection was observed on parasitized host eggs after 24, 72 and 120h of parasitism. the rejection was higher for eggs parasitized after 72h and 120h of parasitism as compared to the eggs after 24h of parasitism. t. pretiosum contact time on eggs after 24h of parasitism was greater than on 72 and 120h. the offspring produced from hosts from which a single parasitoid emerged were larger, exhibited no deformities and greater capacity of parasitism, different from those produced from eggs where two parasitoids emerged. offspring longevity, however, was similar for females emerged from hosts from which one or two adults emerged. in conclusion, t. pretiosum was able to recognize previously parasitized eggs and the superparasitism reduced the parasitoid.reproductive success.
Características biológicas de linhagens de Trichogramma pretiosum, criados em ovos de Sitotroga cerealella e Anagasta kuehniella
Pratissoli, Dirceu;Holtz, Anderson Mathias;Gon?alves, José Roberto;Oliveira, Regiane Cristina de;Vianna, Ulysses Rodrigues;
Horticultura Brasileira , 2004, DOI: 10.1590/S0102-05362004000300012
Abstract: the biological characteristics of five lineages of t. pretiosum riley (hym.: trichogrammatidae), collected from tomato crops, and reared in a. kuehniella (zeller) and s. cerealella (olivier) eggs were evaluated. the parasitism rate of the lineages, varied from 56,1 to 68.6%, when the host was a. kuehniella, being higher than for s. cerealella. the viability of all lineages, when reared in s. cerealella eggs, was superior to 90%; however, only those lineages reared in s. cerealella eggs and collected in afonso cláudio and venda nova dos imigrantes (espirito santo state, brazil) were significantly higher than those reared on a. kuehniella. the longevity of the offspring submitted to the parasitism, was higher in all the lineages reared in a. kuehniella eggs. all five lineages can be mass reared using both hosts. however, considering the parasitism rate and the quality of the progeny, the host a. kuehniella seems to be superior than s. cerealella
Thermal requirements of Trichogramma pretiosum and T. acacioi (Hym.: Trichogrammatidae), parasitoids of the avocado defoliator Nipteria panacea (Lep.: Geometridae), in eggs of two alternative hosts
Pratissoli, Dirceu;Zanuncio, José Cola;Vianna, Ulysses Rodrigues;Andrade, Josimar Souza;Pinon, Tobias Baruc Moreira;Andrade, Gilberto Santos;
Brazilian Archives of Biology and Technology , 2005, DOI: 10.1590/S1516-89132005000500003
Abstract: this research studied the thermal requirements of trichogramma pretiosum and t. acacioi (hymenoptera: trichogrammatidae), parasitoids of nipteria panacea (lepidoptera: geometridae), with eggs of the alternative hosts anagasta kuehniella (lepidoptera: pyralidae) and sitotroga cerealella (lepidoptera: gelechiidae) aiming to use these natural enemies in biological control programs of this pest in avocado orchards. t. pretiosum needed 151.83 and 160.04 degree-days, above threshold of 10.70 and 10.75°c, while these values were 158.50 and 155.46 degree-days, above threshold of 10.67 and 10.46°c for t. acacioi when exposed to eggs of a. kuehniella and s. cerealella, respectively.
Nuevos registros y distribución de especies de trichogramma (hymenoptera: trichogrammatidae) en el Estado Lara, Venezuela New reports and distribution of Trichogramma species (Hymenoptera: Trichogrammatidae) in Lara State, Venezuela
José Morales,Carlos Vásquez,Neicy Valera,Norayda Arrieche
Bioagro , 2010,
Abstract: Se realizaron estudios de campo y de laboratorio para obtener nuevos registros y distribución de las especies del género Trichogramma en varios municipios del estado Lara, Venezuela. En el campo, las especies fueron obtenidas mediante trampas con huevos de Sitotroga cerealella (Olivier) y por colecta de huevos de lepidópteros en hojas de varios cultivos. En el laboratorio, los machos de Trichogramma fueron montados en láminas microscópicas para observar la genitalia y otros caracteres morfológicos usados para su identificación. Se encontró Trichogramma atopovirilia Oatman y Platner parasitando huevos de lepidópteros en los municipios Morán y Jiménez, mientras que Trichogramma pretiosum (Riley) lo fue en Morán y Andrés Eloy Blanco. Ambas especies ejercieron su parasitismo sobre varios hospederos localizados a diferentes pisos altitudinales. Los reportes de T. atopovirilia parasitando huevos de Spodoptera frugiperda en Quíbor (municipio Jiménez) y T. pretiosum en huevos de Agraulis vanillae (L.) en Sabana Grande (municipio Andrés Eloy Blanco), así como Trichogramma sp.1 en huevos de Utetheisa ornatrix y Trichogramma sp.2 en huevos de Erinnyis sp. en El Pampero (municipio Iribarren), constituyen nuevos hallazgos de este parasitoide para el estado Lara. Field and laboratory studies were conducted to obtain new distribution records of Trichogramma wasp species in Lara State, Venezuela. In the field, specimens were obtained from traps containing eggs of Sitotroga cerealella (Olivier) and from lepidopteran egg samples collected from various crop leaves. In the laboratory, specimens of Trichogramma were mounted on microscope slides to show male genitalia and other morphological characters used for identification. It was found that Trichogramma atopovirilia Oatman y Platner emerged from lepidopteran eggs in Morán and Jiménez Municipalities, while T. pretiosum did it in Morán and Andrés Eloy Blanco. Both species exerted their parasitism on several hosts located at different altitudes. The reports of T. atopovirilia parasitizing eggs of Spodoptera frugiperda in Quíbor (Jiménez Municipality), T. pretiosum in eggs of Agraulis vanillae (L.) in Sabana Grande (Andrés Eloy Blanco Municipality), and Trichogramma sp.1 in eggs of Ornatrix Utetheisa (L.) and Trichogramma sp.2 in eggs of Erinnyis sp. in El Pampero (Iribarren Municipality) are new records for this parasitoid in Lara State.
Nuevos registros y distribución de especies de trichogramma (hymenoptera: trichogrammatidae) en el Estado Lara, Venezuela
Morales,José; Vásquez,Carlos; Valera,Neicy; Arrieche,Norayda; Arcaya,Evelín; Querino,Ranyse B;
Bioagro , 2010,
Abstract: field and laboratory studies were conducted to obtain new distribution records of trichogramma wasp species in lara state, venezuela. in the field, specimens were obtained from traps containing eggs of sitotroga cerealella (olivier) and from lepidopteran egg samples collected from various crop leaves. in the laboratory, specimens of trichogramma were mounted on microscope slides to show male genitalia and other morphological characters used for identification. it was found that trichogramma atopovirilia oatman y platner emerged from lepidopteran eggs in morán and jiménez municipalities, while t. pretiosum did it in morán and andrés eloy blanco. both species exerted their parasitism on several hosts located at different altitudes. the reports of t. atopovirilia parasitizing eggs of spodoptera frugiperda in quíbor (jiménez municipality), t. pretiosum in eggs of agraulis vanillae (l.) in sabana grande (andrés eloy blanco municipality), and trichogramma sp.1 in eggs of ornatrix utetheisa (l.) and trichogramma sp.2 in eggs of erinnyis sp. in el pampero (iribarren municipality) are new records for this parasitoid in lara state.
Biological and Life Table Studies of Harmonia axyridis Pallas (Coleoptera: Coccinellidae) Reared on the Factitious Prey, Sitotroga cerealella Olivier (Lepidoptera: Gelechiidae)  [PDF]
A. H. Abdel-Salam
Pakistan Journal of Biological Sciences , 2000,
Abstract: The developmental times of immature stages, survival percent, longevity, fecundity, and life table parameters of Harmonia axyridis were studied under laboratory conditions by feeding on fresh and frozen grain moth eggs (GME), Sitotroga cerealella. The effect of crowding adults on fecundity of females was also determined. The total developmental time from egg hatching to adult eclosion ranged from 18.89 0.32 to 22.5 0.21 days on fresh and frozen GME, respectively. Survival percent from egg hatching to adult emergence was differed significantly when the predator fed on the two diets of GME. Also, pupal and adult weights were affected by feeding on fresh and on frozen GME. There were no significant differences in longevity of females, while there were significant variations in fecundity of females and longevity of males. The calculated values of T, DT, Ro, rm, and erm were high by feeding on fresh GME. Morever, rates of survivorship (Lx), and maximum oviposition per female per day (Mx) were high when the predator reared on fresh than on frozen GME. Crowding conditions of predator adults affected the fecundity of females due to egg cannibalism by both males and females of the predator.
Desarrollo de una metodología de crianza en laboratorio de la polilla de los cereales Sitotroga cerealella (Olivier) como posible hospedante de insectos biocontroladores de interés agrícola  [cached]
Mónica Palma Jiménez,Fressy Rojas Arce,Annie Guillén Watson,Vladimir Villalba Velásquez
Tecnología en Marcha , 2011,
Abstract: Sitotroga cerealella (Olivier) es conocida como la polilla de los cereales, ya que se alimenta de granos de cereales de consumo humano, causando da o tanto a los sembradíos como a los almacenes de granos. A pesar de que el control químico es efectivo para bajar la población de la polilla, se ha optado por el biocontrol mediante parasitoides y depredadores. Por tal motivo, en el presente ensayo, desarrollado en el laboratorio de biocontroladores del Centro de Investigación en Biotecnología, se pretende establecer una metodología de cría masiva de Sitotroga cerealella, para que sirva de hospedero del depredador Chrysoperla sp., mediante la construcción de una estructura metálica acondicionada para el establecimiento de bandejas con el sustrato de trigo para el desarrollo de las polillas y su posterior puesta y recolecta de huevos para la alimentación de los depredadores. Se determinó que el ciclo biológico de la polilla fue de 4,5 días para los huevos; 23 días para las larvas; 7,7 para las pupas y 4 días para los adultos, con lo que era posible establecer una nueva generación cada cinco semanas. El ataque de los ácaros en el presente proyecto impidió avanzar con la cría de los depredadores, por lo que se desarrolló solo la metodología de la cría de la polilla de los cereales.
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