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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.
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
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.
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.
Harmonia axyridis: a threat to Brazilian Coccinellidae?
Martins, Camila B. C.;Almeida, Lúcia M.;Zonta-de-Carvalho, Regina C.;Castro, Camila F.;Pereira, Rosylaine A.;
Revista Brasileira de Entomologia , 2009, DOI: 10.1590/S0085-56262009000400018
Abstract: harmonia axyridis (pallas) (coleoptera, coccinellidae) is a polyphagous asian species, well-known as a classical biological control agent of aphids around the world, introduced probably accidentally in brazil, sampled for the first time in 2002. it is an important intraguild predator, competing for food with native coccinellids. it was studied h. axyridis alimentary sources and host plants, its abundance compared with native and established species, the influence of abiotic factors and the seasons over the abundance of h. axyridis throughout one year, and discussed the mechanisms which influence the displacement of species. harmonia axyridis was found in 38 plant species, among them 20 were new records, feeding on 20 aphid species, eight of them new alimentary records. between 2006/2007, eight coccinellidae species were collected and h. axyridis was the most abundant (91.23%). harmonia axyridis peak of abundance occurred in august and september 2007, probably influenced by the temperature and food availability. from 1999 to 2007 a reduction and variation in the diversity of collected species of coccinellidae were observed with the predominance of h. axyridis, which may indicate their displacement.
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%).
Harmonia axyridis in Chile: a new threat
Grez,Audrey; Zaviezo,Tania; González,Guillermo; Rothmann,Sergio;
Ciencia e investigación agraria , 2010, DOI: 10.4067/S0718-16202010000300013
Abstract: in this work, we document the presence of harmonia axyridis in chile, an invasive coccinellid species that has had negative effects in other regions of the world, such as: impacts on non-target arthropods, invasions of houses and fruit damage. this species has been found in the last three years in the metropolitan and valparaíso regions, in crops, pine plantations and inside houses. we warn about the consequences of the introduction of this species to chile and claim to take actions to avoid its spread in the country.
Tabela de vida de fertilidade de três espécies neotropicais de Trichogrammatidae em ovos de hospedeiros alternativos como critério de sele??o hospedeira
Dias, Nivia da Silva;Parra, José Roberto Postali;Dias, Carlos Tadeu dos Santos;
Revista Brasileira de Entomologia , 2010, DOI: 10.1590/S0085-56262010000100016
Abstract: the objective of this work was to select the factitious host that permit the best development of three neotropical trichogrammatidae species, trichogramma atopovirilia oatman & platner, 1983; trichogramma bruni nagaraja, 1983, and trichogrammatoidea annulata de santis, 1972, using the fertility life table on their respective hosts as a comparative parameter. mean generation time (t), net reproductive rate (ro), intrinsic rate of natural increase (rm) and the finite rate of increase (λ) were estimated. a fertility life table is useful to select the most adequate factitious hosts for the trichogrammatid species. corcyra cephalonica (stainton, 1865) (lepidoptera, pyralidae) was the most suitable factitious host for rearing of t. annulata and t. bruni; while anagasta kuehniella (zeller, 1879) (lepidoptera, pyralidae) and/or c. cephalonica were the most suitable hosts for t. atopovirilia. sitotroga cerealella (olivier, 1819) (lepidoptera, gelechiidae) presented a low capacity of population increase for the three species of parasitoids, therefore, being an inadequate species as a factitious host.
Record of the invasive alien ladybird Harmonia axyridis (Coleoptera, Coccinellidae) from Kenya  [cached]
Old?ich Nedvěd,Ji?í Háva,Daniela Kulíková
ZooKeys , 2011, DOI: 10.3897/zookeys.106.1242
Abstract: The biological control agent and alien invasive ladybird Harmonia axyridis (Pallas, 1773) was recorded for the first time in Kenya, and in equatorial Africa, in 2010.
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