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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.
Trichogramma acacioi (Hymenoptera, Trichogrammatidae) parasitism capacity at different temperatures and factitious hosts
Pratissoli, Dirceu;Bueno, Adeney de Freitas;Bueno, Regiane Cristina Oliveira de Freitas;Zanúncio, José Cola;Polanczyk, Ricardo Antonio;
Revista Brasileira de Entomologia , 2009, DOI: 10.1590/S0085-56262009000100032
Abstract: it was studied the parasitism capacity of trichogramma acacioi on anagasta kuehniella and sitotroga cerealella eggs at different temperatures (15, 20, 25, 30 and 35 ± 1°c). the parasitism of t. acacioi varied with temperature and host. the highest parasitism (380%) were observed during the first days after emergence in both hosts, at all tested temperatures. the accumulated parasitism varied with both host and temperature, being higher on a. kuehniella at 20°c, what shows good parasitoid species adaptation to this temperature. thus, we conclude that the best host and best temperature to be used at mass-rearing of t. acacioi is a. kuehniella and 20oc, respectively. moreover, this trichogramma species has great potential to be used in field releases at regions where average temperature is around 20oc.
CARACTERíSTICAS BIOLóGICAS DE TRICHOGRAMMA EXIGUUM EM OVOS DE ANAGASTA KUEHNIELLA E SITOTROGA CEREALELLA
Pratissoli,Dirceu; Pin Dalvi,Leandro; Polanczyk,Ricardo Antonio; Santos Andrade,Gilberto; Mathias Holtz,Anderson; Otes Nicoline,Henrique;
Idesia (Arica) , 2010, DOI: 10.4067/S0718-34292010000100006
Abstract: 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.
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.
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%).
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.
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%.
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.
Adult feeding and mating effects on the biological potential and parasitism of Trichogramma pretiosum and T. acacioi (Hym.: Trichogrammatidae)
Pratissoli, Dirceu;Oliveira, Harley Nonato de;Polanczyk, Ricardo Antonio;Holtz, Anderson Mathias;Bueno, Regiane Cristina Oliveira de Freitas;Bueno, Adeney de Freitas;Gon?alvez, José Roberto;
Brazilian Archives of Biology and Technology , 2009, DOI: 10.1590/S1516-89132009000500001
Abstract: this work was carried out to study the effects of adult feeding and mating on the biological potential and parasitism of trichogramma pretiosum and t. acacioi (hymenoptera: trichogrammatidae) to improve their use in biological control programs. both species presented higher parasitism and longevity whenever adults were fed. fed and unmated t. pretiosum females led to low parasitism whereas t. acacioi females did not present parasitism whatsoever. egg viability of t. pretiosum was similar for fed and mated individuals, but t acacioi showed lower values for this parameter when unfed and without mating. unmated females produced only males while mated ones had more than 60% female descendents for both trichogramma species. therefore, mated and fed female parasitoids should be released in crop systems to increase the biological control.
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