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Biologia de Trichogramma pretiosum Riley em ovos de Sitotroga cerealella (Olivier)
ALENCAR, JOSé ADALBERTO DE;HAJI, FRANCISCA NEMAURA PEDROSA;OLIVEIRA, JOSé VARGAS DE;MOREIRA, ANDRéA NUNES;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000800021
Abstract: biological aspects of the parasitoid trichogramma pretiosum riley (hymenoptera: trichogrammatidae) were studied in eggs of its factitious host, sitotroga cerealella (olivier) (lepidoptera: gelechiidae), with the objective of obtaining basic information about the biology of this parasitoid under environmental lab conditions. there was no control of temperature, relative humidity and photoperiod with the purpose of simulating the natural conditions of the submédio s?o francisco region, pernambuco state, brazil. the mean temperature during the study was 25.9± 0.9°c. the results showed a mean duration of the period egg-adult of 9.42 days and a viability of parasited eggs of 88%. the mean number of t. pretiosum emerged by egg of the host was 1.41 with a maximum of two individuals/egg. the mean longevity of females was 5.53 days while the males lived an average of 3.08 days when both were fed with pure honey.
Biologia de Trichogramma pretiosum Riley em ovos de Sitotroga cerealella (Olivier)
ALENCAR JOSé ADALBERTO DE,HAJI FRANCISCA NEMAURA PEDROSA,OLIVEIRA JOSé VARGAS DE,MOREIRA ANDRéA NUNES
Pesquisa Agropecuária Brasileira , 2000,
Abstract: Estudaram-se, em laboratório, aspectos biológicos de Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) em ovos do hospedeiro alternativo Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae), visando à obten o de informa es básicas sobre a biologia desse parasitóide em condi es de laboratório. N o houve controle de temperatura, umidade relativa e fotoperíodo, com o objetivo de simular as condi es do Submédio do Vale do S o Francisco, Estado de Pernambuco. A temperatura média registrada durante o desenvolvimento do trabalho foi 25,9±0,9°C. Os resultados mostraram uma dura o média do período ovo-adulto de 9,42 dias e uma viabilidade de ovos parasitados de 88%. O número médio de T. pretiosum emergido por ovo do hospedeiro foi de 1,41, com um máximo de dois indivíduos/ovo. As fêmeas viveram, em média, 5,53 dias, enquanto os machos apresentaram longevidade média de 3,08 dias, quando ambos os sexos foram alimentados com mel puro.
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.
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.
CARACTERíSTICAS BIOLóGICAS DE TRICHOGRAMMA EXIGUUM EM OVOS DE ANAGASTA KUEHNIELLA E SITOTROGA CEREALELLA BIOLOGICAL CHARACTERISTICS OF TRICHOGRAMMA EXIGUUM IN THE EGGS OF ANAGASTA KUEHNIELLA END SITOTROGA CEREALELLA
Dirceu Pratissoli,Leandro Pin Dalvi,Ricardo Antonio Polanczyk,Gilberto Santos Andrade
IDESIA , 2010,
Abstract: O objetivo deste trabalho foi obter informa es sobre alguns aspectos biológicos de Trichogramma exiguum Pinto & Platiner, (Hymenoptera: Trichogrammatidae) criado nos hospedeiros alternativos Anagasta kuehniella Zeller (Lepidoptera: Pyralidae) e Sitotroga cerealella Oliver (Lepidoptera: Gelechiidae), visando à produ o desses parasitóides para utiliza o no controle biológico de pragas. A maior taxa de parasitismo de T. exiguum foi encontrada em ovos de A. kuehniella. A viabilidade foi superior em ovos de S. cerealella. A raz o sexual foi semelhante para ambos os hospedeiros alternativos. Estes resultados demonstram que ambos hospedeiros alternativos podem ser utilizados na cria o massal de T. exiguum, porém levando em considera o a importancia da taxa de parasitismo, A. kuehniella demonstrou maior aptid o. The objective of this work was to evaluate information about biological characteristics of egg of parasitoid Trichogramma exiguum Pinto & Platiner, (Hymenoptera: Trichogrammatidae) on the alternative hosts Anagasta kuehniella Zeller (Lepidoptera: Pyralidae) and Sitotroga cerealella Oliver (Lepidoptera: Gelechiidae) aiming to use in biological control programs. The higher rate of parasitism of the T. exiguum was verified on eggs of A. kuehniella. The viability of eggs was higher on eggs of S. cerealella. There is not influence in both alternative hosts in the sex ratio. Both alternative hosts can be used in massal rearing of T. exiguum, however due to the importance of the rate of parasitism, A. kuehniella is better adapting.
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.
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
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.
Influência da regi?o de plantio do arroz s?bre a infesta??o da tra?a dos cereais, Sitotroga cerealella (Olivier) (Lepidoptera Gelechiidae)
Rossetto, Carlos Jorge;Accioli, A.;Oliveira, L. B.;Souza, D. M.;
Bragantia , 1969, DOI: 10.1590/S0006-87051969000100015
Abstract: it was investigated whether or not the local of cultivation of rice affects the posterior susceptibility to sitotroga cerealella of the grain in storage. samples of rough rice from the same bulk of seeds, of the variety dourado agulha, were planted in four regions of the state of s?o paulo, pindamonhangaba paddy, pindorama upland, mococa paddy. campinas paddy and campinas upland. the rice, after having been harvested, was taken to campinas where - after one year and half of storage under uniform conditions for all samples - it was tested for its susceptibility to the insect, by using samples of each local replicated 10 times randomly distributed inside of an insect cage. the progeny of insects of each sample was recorded daily. the trial was repeated twice. the results showed that the local of cultivation has influence upon the posterior susceptibility of the grain in storage. the rice grown in pindorama was more damaged by the pest than the rice grown in other regions. there was no significant difference in susceptibility between the paddy and upland rice grown in campinas. scheffe's test indicated that there was a strong contrast between the paddy rice grown in pinda-monhangaba, mococa and campinas and the upland rice grown in pindorama and campinas, the latter being more infested. although the locality may account for this difference, there was a tendency for the upland rice to be much more infested in storage by s. cerealella. the period between infestation and the beginning of emergence of the first adults was of 23 days, showing that under favorable conditions this pest may give one generation each 25 days, in rough rice.
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