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Biological characteristics and thermal requirements of a Brazilian strain of the parasitoid Trichogramma pretiosum reared on eggs of Pseudoplusia includens and Anticarsia gemmatalis

BUENO, Regiane Cristina Oliveira de Freitas; PARRA, Jose Roberto Postali; BUENO, Adeney de Freitas
Fonte: ACADEMIC PRESS INC ELSEVIER SCIENCE Publicador: ACADEMIC PRESS INC ELSEVIER SCIENCE
Tipo: Artigo de Revista Científica
ENG
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A new strain of the parasitoid Trichogramma pretiosum, was collected in Rio Verde County, State of Goias, Central Brazil, and designated as T. pretiosum RV. This strain was then found to be the most effective one among several different strains of T. pretiosum tested in a parasitoid selection assay. Therefore, its biological characteristics and thermal requirements were studied, aiming at allowing its multiplication under controlled environmental conditions in the laboratory. The parasitoid was reared on eggs of Pseudoplusia includens and Anticarsia gemmatalis at different constant temperatures within an 18-32 degrees C temperature range. The number of annual generations of the parasitoid was also estimated at those temperatures. Results have shown that T. pretiosum RV developmental time, from egg to adult, was influenced by all temperatures tested within the range, varying from 6.8 to 20.3 days and 6.0 to 17.0 days on eggs of P. includens and A. gemmatalis, respectively. The emergence of T. pretiosum RV from eggs of A. gemmatalis was higher than 94% at all temperatures tested. When this variable was evaluated on eggs of P. includens, however, the figures were higher than that within the 18-30 degrees C range (more than 98%), and were also statistically higher than the emergence observed at 32 degrees C (90.2%). The sex ratio of the parasitoids emerged from eggs of A. gemmatalis decreased from 0.55 to 0.29 at 18-32 degrees C...

Comportamento olfativo de três espécies de parasitóides (Hymenoptera: Braconidae) de moscas-das-frutas (Diptera: Tephritidae); Olfactory behavior of three parasitoid species (hymenoptera: braconidae) of fruit flies (diptera: tephritidae)

Silva, José Wilson Pereira da
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 22/07/2005 PT
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Entre os inimigos naturais das moscas-das-frutas, os representantes da subfamília Opiinae (Hymenoptera: Braconidae) têm sido os mais utilizados em programas de controle biológico. Entretanto, algumas espécies da subfamília Alysiinae são comumente relacionadas ao parasitismo desses dípteros, em particular Asobara anastrephae (Muesebeck). No estudo da eficiência desses parasitóides é de fundamental importância o conhecimento dos estímulos utilizados para a localização do hábitat de seus hospedeiros. Dessa forma, foram avaliadas as respostas olfativas do parasitóide exótico Diachasmimorpha longicaudata Ashmead, e dos nativos, Doryctobracon areolatus (Szépligeti) e A. anastrephae a frutos de goiaba (Psidium guajava L.) com e sem larvas de moscasdas- frutas, em condições de laboratório. D. longicaudata e D. areolatus foram também estudados em telado. As fêmeas de D. longicaudata e de D. areolatus responderam aos odores de frutos podres não-infestados, embora D. areolatus também tenha sido atraído aos frutos em maturação inicial (de vez). As fêmeas dessas espécies demonstraram reconhecer os voláteis de frutos com larvas de Ceratitis capitata (Wied.). No entanto, em bioensaios realizados com frutos contendo larvas de diferentes instares...

Toxicidade de inseticidas neonicotinóides sobre o psilídeo Diaphorina citri Kuwayama (Hemiptera: Psyllidae) e o parasitóide Tamarixia radiata (Waterson) (Hymenoptera: Eulophidae); Toxicity of neonicotinoid insecticides on the psyllid Diaphorina citri Kuwayama (Hemiptera: Psyllidae) and the parasitoid Tamarixia radiata (Waterson) (Hymenoptera: Eulophidae)

Carvalho, Stella Pacheco Lombardi de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 16/04/2008 PT
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Os inseticidas neonicotinóides são atualmente o principal grupo químico utilizado para o controle de insetos sugadores, constituindo-se uma boa opção para o controle de Diaphorina citri Kuwayama. Outra opção de controle do psilídeo tem sido a exploração do parasitóide Tamarixia radiata (Waterson). A compatibilidade dessas duas estratégias de controle poderia auxiliar na implementação de programas de manejo integrado de pragas na cultura do citros. No entanto, faltam estudos sobre a caracterização da suscetibilidade de D. citri para os inseticidas neonicotinóides e o impacto desses inseticidas sobre T. radiata. Sendo assim, os objetivos do trabalho foram o de caracterizar a suscetibilidade de D. citri a inseticidas neonicotinóides, realizar o monitoramento da suscetibilidade a esses inseticidas em populações de D. citri coletadas em pomares de diferentes regiões do Estado de São Paulo e avaliar os efeitos letais e subletais desses inseticidas sobre o parasitóide T. radiata. Os inseticidas avaliados foram: thiamethoxam, thiacloprid e imidacloprid. O método de bioensaio adotado foi o de contato residual para a caracterização da suscetibilidade de D.citri a esses inseticidas. O monitoramento da suscetibilidade a esses inseticidas em diferentes populações de D. citri foi realizado com concentrações diagnósticas baseadas na concentração letal 95 (CL95) de cada inseticida. Para avaliar os efeitos letais e subletais desses inseticidas sobre T. radiata foram realizados bioensaios de contato direto em adultos e pupas...

Effects of different temperatures on the life history of Evania appendigaster L. (Hymenoptera: Evaniidae), a solitary oothecal parasitoid of Periplaneta americana L. (Dictyoptera: Blattidae)

Bressan-Nascimento, S.; Fox, E. G. P.; Pilizi, L. G. T.
Fonte: Academic Press Inc. Elsevier B.V. Publicador: Academic Press Inc. Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 104-109
ENG
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The influence of temperatures on the life parameters of the solitary oothecal parasitoid Evania appendigaster, was investigated in the laboratory. Parasitized oothecae of Periplaneta americana were left to develop under seven constant temperatures: 15, 17, 20, 25, 30, 35, and 40 degrees C. At the end, we found that: (i) E. appendigaster was able to complete development within the temperature range of 17-34 degrees C; (ii) mean adult longevity decreased as temperature increased, with the temperature of 40 degrees C being fatal in a matter of hours; (iii) males lived longer than females between 15 and 30 degrees C; (iv) adult emergence rate was the highest at 25 degrees C, and (v) no wasps emerged at 15 or 40 degrees C. Non-emerged oothecae contained either unhatched eggs or dead larvae. We determined the theoretical lower developmental threshold and thermal constant for the complete development as 12.9 degrees C and 584.8 day-degrees for males, and 13.1 degrees C and 588.2 day-degrees for females, respectively. A good balance between faster development, maximum adult longevity and good egg viability was obtained between 25-30 degrees C, and that would be the best temperature range for rearing E. appendigaster. (C) 2009 Elsevier B.V. All rights reserved.

Evaluation of Trichospilus diatraeae (Hymenoptera: Eulophidae) as parasitoid of the eucalyptus defoliator Eupseudosoma aberrans Schaus, 1905 (Lepidoptera: Arctiidae)

Zache, Bruno; da Costa Zache, Ronelza Rodrigues; de Souza, Natalia Medeiros; Ferreira do Amaral Dal Pogetto, Mario Henrique; Wilcken, Carlos Frederico
Fonte: Taylor & Francis Ltd Publicador: Taylor & Francis Ltd
Tipo: Artigo de Revista Científica Formato: 363-366
ENG
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); The control of pests in Eucalyptus is complex. Due to this complexity, alternative control methods have been proposed, namely biological control through use of parasitoids. Trichospilus diatraeae is a pupal parasitoid that preferentially attacks species of the order Lepidoptera. This is the first report of T. diatraeae parasitising Eupseudosoma aberrans under lab conditions in Brazil.

Estudo da fauna de parasitoides (Insecta: Hymenoptera) associada a agroecossistema de manejo orgânico em Jaguariúna, SP; Studies on parasitoid entomofauna (Insecta: Hymenoptera) associated to organic agroecosystem at Jaguariúna, SP

Camila Pozzo Maioralli
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 21/02/2014 PT
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Embora os agroecossistemas resultem da ação humana sobre os ecossistemas naturais, sua estrutura e funcionamento se matem a partir de princípios e processos ecológicos. Dadas as externalidades negativas causadas pela agricultura convencional, alguns setores acadêmicos e movimentos em prol da agricultura de base ecológica buscam por um novo paradigma de agricultura, pautado na sustentabilidade. Dentre as práticas utilizadas pela agricultura de base ecológica para o controle de pragas está o controle biológico, incluindo o uso dos himenópteros parasitoides. Estes são responsáveis por grande parte da regulação populacional de insetos fitófagos. O objetivo deste trabalho foi estudar a fauna de himenópteros parasitoides associada a um agroecossistema de manejo orgânico, e comparar três áreas com estruturas distintas ¿ bananal, horta e mata ¿ em relação à diversidade de famílias de himenópteros parasitoides presentes em cada área. Foram realizadas coletas mensais de janeiro a março de 2013, com o uso de armadilhas Malaise. Foram coletados 1990 indivíduos, distribuídos em 8 superfamílias e 25 famílias. As famílias mais abundantes foram Braconidae, Ichneumonidae e Figitidae. O maior número de indivíduos e a maior riqueza de famílias foram obtidos na área da horta. O maior número de famílias raras foi obtido na área de mata. As três áreas apresentaram valores muito próximos para os índices de diversidade...

Estimating parasitoid immature mortality by comparing oviposition and pupal development of Trichogramma galloi ZUCCHI and T. pretiosum RILEY on natural and factitious hosts

CÔNSOLI,F. L.; PARRA,J. R. P.; VINSON,S. B.
Fonte: Instituto Internacional de Ecologia Publicador: Instituto Internacional de Ecologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2000 EN
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Mortality during the immature development of T. galloi and T. pretiosum was estimated on UV-killed and live eggs of a factitious and a natural host, respectively. A staining technique was used to determine the actual parasitization of UV-treated eggs and was compared with the number of parasitoids that emerged per host egg (detectable parasitization). Effects of temperature as a factor of mortality during the immature development of both parasitoids on the factitious host was also assessed. The actual and detectable parasitization of live hosts was measured by recording both the parasitization behavior and the number of eggs where a parasitoid developed successfully. Our data show that mortality during immature development of both parasitoids may occur in live eggs of the natural host. No such mortality was observed when parasitoids developed on UV-killed eggs of the factitious host. Possible causes of parasitoid immature mortality and the effects of using UV-treated eggs of factitious hosts in estimating the parasitism capacity of Trichogramma in field conditions are discussed.

Observation on the host parasitoid interaction between Periplaneta americana, the American cockroach and Tetrastichus hagenowii, an oothecal parasitoid

Srinivasan,R.; Panicker,K. N.
Fonte: Instituto Oswaldo Cruz, Ministério da Saúde Publicador: Instituto Oswaldo Cruz, Ministério da Saúde
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/1994 EN
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Investigations were carried out on the host parasitoid interaction between Periplaneta americana, the American cockroach and Tetrastichus hagenowii, an oothecal parasitoid. This gregarious female parasitoid infected and or oviposited in only one host and caused 100 por cento mortality of the infected host. However, increase in parasitoid density decreased the progeny production and influenced the sex ratio. The progenies produced were male biased. When host preference was tested by offering oothecae of different species of cockroaches, T. hagenowii showed a predilection towards the oothecae of P. americana, suggestings its host specificity.

Effects of female diet and age on offspring sex ratio of the solitary parasitoid Pachycrepoideus vindemmiae (Rondani) (Hymenoptera, Pteromalidae)

Hu,Hao-Yuan; Chen,Zhong-Zheng; Duan,Bi-Sheng; Zheng,Jin-Tu; Zhang,Tong-Xin
Fonte: Sociedade Brasileira De Entomologia Publicador: Sociedade Brasileira De Entomologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2012 EN
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Effects of female diet and age on offspring sex ratio of the solitary parasitoid Pachycrepoideus vindemmiae (Rondani) (Hymenoptera, Pteromalidae). Theories predict that females of parasitoid wasps would adjust the offspring sex ratio to environmental conditions in the oviposition patch, but the diet and age of females would also affect the sex ratio adjustment. Our focus was to test the effects of female diet and age on offspring sex ratio of the solitary parasitoid wasp, Pachycrepoideus vindemmiae (Rondani, 1875). Our results showed that females fed with honey had significantly less female biased offspring sex ratio than those fed only with water. Offspring sex ratio (male percentage) decreased with female age or female longevity at the beginning of oviposition but increased at the end. There should be a sperm limitation in P. vindemmiae females at the end of oviposition, and a higher frequency of unfertilized eggs were laid then. Females also laid more unfertilized eggs at the beginning of oviposition, which would be necessary to insure the mating among offspring. Male offspring developed faster and emerged earlier, which would also reduce the risk of virginity in offspring with female-biased sex ratio.

Hymenoepimecis neotropica (Brues & Richardson) (Hymenoptera, Ichneumonidae, Pimplinae) parasitoid of Araneus omnicolor (Keyserling) (Araneae, Araneidae): first host record and new occurrence to Brazil

Sobczak,Jober Fernando; Loffredo,Ana Paula da Silva; Camargo,Luiza Figueiredo; Penteado-Dias,Angélica M.
Fonte: Sociedade Brasileira De Entomologia Publicador: Sociedade Brasileira De Entomologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2012 EN
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Hymenoepimecis neotropica (Brues & Richardson) (Hymenoptera, Ichneumonidae, Pimplinae) parasitoid of Araneus omnicolor (Keyserling) (Araneae, Araneidae): first host record and new occurrence to Brazil. The species of the genus Hymenoepimecis occur only in Neotropical region, being recognized for using as their hosts spiders which build orbicular webs. That wasp was described occurring only in the Guyana. This work expands the geographical distribution of the species to Brazil and records the spider Araneus omnicolor (Araneae, Araneidae) as its host. Furthermore, it provides information about the natural history of this interaction.

No impact of Bt soybean that express Cry1Ac protein on biological traits of Euschistus heros (Hemiptera, Pentatomidae) and its egg parasitoid Telenomus podisi (Hymenoptera, Platygastridae)

Silva,Gabriela Vieira; Pasini,Amarildo; Bueno,Adeney de Freitas; Bortolotto,Orcial Ceolin; Barbosa,Gustavo Caselato; Cruz,Ynaiara Kristhine Stopa
Fonte: Sociedade Brasileira De Entomologia Publicador: Sociedade Brasileira De Entomologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2014 EN
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No impact of Bt soybean that express Cry1Ac protein on biological traits of Euschistus heros (Hemiptera, Pentatomidae) and its egg parasitoid Telenomus podisi (Hymenoptera, Platygastridae). Biological traits of the stink bug Euschistus heros and its main biological control agent Telenomus podisi were evaluated under controlled environmental conditions (25 ± 2ºC; 60 ± 10% RH; and 14/10 h photoperiod) by placing first instar nymphs into Petri dishes with pods originating from two soybean isolines (Bt-soybean MON 87701 × MON 89788, which expresses the Cry1Ac protein, and its near non-Bt isoline A5547) where they remained until the adult stage. Due to gregarious behavior exhibited by first instar nymphs, they were individualized only when at the second instar. Adults were separated by sex and weighed, and pronotum width of each individual was subsequently measured. They were placed into plastic boxes containing soybean grains of the same soybean isoline as food source. Egg viability and female fecundity were assessed in adult individuals. Adult females of T. podisi (up to 24h old) were placed with eggs of E. heros from mothers reared on both soybean isolines. Nymphal development time, insect weight, pronotum width, sex ratio, female fecundity...

New record of Tetrastichus howardi (Olliff) as a parasitoid of Diatraea saccharalis (Fabr.) on maize

Cruz,Ivan; Redoan,Ana Carolina; Silva,Rafael Braga da; Figueiredo,Maria de Lourdes Corrêa; Penteado-Dias,Angélica Maria
Fonte: São Paulo - Escola Superior de Agricultura "Luiz de Queiroz" Publicador: São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2011 EN
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Diatraea saccharalis (Fabr.) (Lepidoptera: Pyralidae) spends the largest part of its life cycle inside the stalk of the host plant,which provides protection against the action of conventional control methods. Biological control has been considered a viable alternative to control this pest in sugarcane (Saccharum officinarum L.) and corn (Zea mays L.), two pest preferential hosts. This paper reports the occurrence in Brazil of Tetrastichus howardi (Olliff) (Hymenoptera; Chalcidoidea: Eulophidae) parasitizing pupae of D. saccharalis obtained from corn plants. It also includes preliminary biological data about the insect. A single female of T. howardi is able to produce up to 66 offspring using a single pupa of the host D. Saccharalis and apparently does not distinguish between the host pupae of different ages. The life cycle of the parasitoid was around 25.5 days. The presence of the parasitoid in Brazil opens a new perspective on suppression of the sugarcane borer, considering the promising results already obtained in Asian countries. The insect is well adapted to laboratory conditions, can be produced in large scale and may became an additional option for the integrated pest management in those crops where D. saccharalis is a key pest such as the sugarcane...

Species of Lepidoptera defoliators of Eucalyptus as new host for the parasitoid Palmistichus elaeisis (Hymenoptera: Eulophidae)

Pereira,Fabricio Fagundes; Zanuncio,Teresinha Vinha; Zanuncio,José Cola; Pratissoli,Dirceu; Tavares,Marcelo Teixeira
Fonte: Instituto de Tecnologia do Paraná - Tecpar Publicador: Instituto de Tecnologia do Paraná - Tecpar
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2008 EN
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Pupae of Thyrinteina arnobia (Stoll) and Thyrinteina leucoceraea Rindge (Lepidoptera: Geometridae) were obtained from Eucalyptus cloeziana F. Muell and Eucalyptus urophylla S.T. Blake plants, respectively. Specimens of a parasitoid emerged from T. arnobia pupae and also found parasitising T. leucoceraea pupae in the field were identified as Palmistichus elaeisis Delvare and LaSalle (Hymenoptera: Eulophidae). This is the first report on P. elaeisis parasitizing T. arnobia and T. leucoceraea pupae in natural conditions in Brazil. P. elaeisis also parasitized these hosts and Bombyx mori Linnaeus (Lepidoptera: Bombycidae), Anticarsia gemmatalis Hubner, Pseudaletia sequax Franclemont, Alabama argillacea Huebner (Lepidoptera: Noctuidae), Dirphia moderata Bouvier (Lepidoptera: Saturniidae) and Halysidota pearsoni Watson (Lepidoptera: Arctiidae) in the laboratory. The production and release of P. elaeisis could be an efficient alternative for controlling Lepidoptera defoliators in eucalyptus plantations.

Description of the male Hymenoepimecis japi Sobczak et al. 2009 (Hymenoptera, Ichneumonidae) parasitoid of Leucauge roseosignata Mello-Leitão 1943 (Araneae: Tetragnathidae)

Sobczak,JF.
Fonte: Instituto Internacional de Ecologia Publicador: Instituto Internacional de Ecologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/11/2012 EN
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The male of Hymenoepimecis japi (Hymenoptera, Ichneumonidae, Pimplinae) is described and illustrated. The specimen was collected in a modified web (cocoon web) of Leucauge roseosignata (Araneae, Tetragnathidae) made in a laboratory. Both, host and parasitoid were collected in Reserva Biológica Serra do Japi, located in Jundiaí, São Paulo, Brazil.

Response of Glyptapanteles militaris (Walsh) (Hymenoptera: Braconidae), a Larval Parasitoid of the Armyworm, Mythimna unipuncta (Haworth) (Lepidoptera: Noctuidae), to Different Temperatures

Oliveira, Luísa; Melo, Rui; Tavares, João
Fonte: International Society of Hymenopterists Publicador: International Society of Hymenopterists
Tipo: Artigo de Revista Científica
Publicado em //1998 ENG
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The effect of four different temperatures (15, 20 25 and 30°C), on biological parameters of the Azorean population of Glyptapanteles militaris (Walsh) was studied, using Mythimna unipuncta (Haworth) as the host. Thirteen biological parameters of the were analyzed: percentage of hosts that died without producing parasitoids; percentage of larvae parasitized from which parasitoids emerged; percentage of hosts surviving to pupate after the parasitoid's sting; egg-larval development time; pupal period; total developmental time; adult longevity; total number of larvae per host; number of larval parasitoids that fail to emerge from each host; mean number of parasitoids that emerged from host larva but failed to spin a cocoon; mean number of cocoons per host; parasitoid sex-ratio; and finally emergence rate of adult parasitoid progeny. The percentage of hosts that died without producing parasitoids increased with increasing temperature. Developmental times significantly decreased with increasing temperature. The mean number of cocoons per host; mean number of parasitoids that emerged from each host larva but failed to spin a cocoon; and total number of larvae per host were higher when the temperature was lower. Parasitoid sex ratio and emergence rate of adult progeny were not affected by the temperatures tested.

Occurrence of the parasitoid Anastatus sp. in eggs of Leptoglossus zonatus under the maize in Brazil

Marchiori,Carlos Henrique
Fonte: Universidade Federal de Santa Maria Publicador: Universidade Federal de Santa Maria
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2003 EN
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The objective of this study was to report, for the first time in Brazil, the occurrence of the parasitoid Anastatus sp. (Hymenoptera: Eupelmidae) in eggs of Leptoglossus zonatus (Hemiptera: Coreidae) on maize (Zea mays L.) in Itumbiara County, State of Goias, Brazil (18°25'S; 49°13'W). Percent parasitism was 6.9%.

Forest remnants contribute to parasitoid conservation: experimental evaluation of parasitism on a leafminer host

Rossetti, María Rosa; Salvo, Silvia Adriana; Videla, Martin; Valladares, Graciela Rosa
Fonte: Springer Publicador: Springer
Tipo: info:eu-repo/semantics/article; info:ar-repo/semantics/artículo; info:eu-repo/semantics/publishedVersion Formato: application/pdf
ENG
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Worldwide, intense forest fragmentation has resulted in mosaic landscapes in which biodiversity and a number of important ecological processes are threatened. Insect parasitism is a vital component of herbivore population regulation, hence the study of parasitism and parasitoid richness in fragmented forests embedded in an agricultural matrix is relevant from conservation and management perspectives. Here, we investigated through experimental field exposure of the leafminer Liriomyza commelinae (Diptera: Agromyzidae) the effects of forest remnant size and edge/interior location on parasitism, species richness and parasitoid community composition. Two consecutive experiments were performed in which pots with mined plants were placed in remnants of Chaco Serrano forests in Central Argentina. Parasitism levels (on average above 50 %) and number of parasitoids species (in total, 20 species) were independent of forest remnant size. However, higher parasitism and species richness were found at the forest edge compared with the interior although the differences in species richness failed to reach statistical significance. Parasitoid community composition was not related to forest size whereas assemblages from interior habitats showed closer similarity than those from the edges. The results suggest forest remnants could play an important role as reservoirs of parasitoids with potential to control crop pests...

New record of Tetrastichus howardi (Olliff) as a parasitoid of Diatraea saccharalis (Fabr.) on maize; Novo registro de Tetrastichus howardi (Olliff) como parasitóide de Diatraea saccharalis (Fabr.) em milho

Cruz, Ivan; Redoan, Ana Carolina; Silva, Rafael Braga da; Figueiredo, Maria de Lourdes Corrêa; Penteado-Dias, Angélica Maria
Fonte: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz Publicador: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; Formato: application/pdf
Publicado em 01/04/2011 ENG
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Diatraea saccharalis (Fabr.) (Lepidoptera: Pyralidae) passa a maior parte de seu ciclo biológico no interior do colmo da planta hospedeira, onde fica protegida contra a ação dos métodos convencionais de controle. O controle biológico tem sido considerado uma alternativa viável para o controle desta praga em cana-de-açúcar (Saccharum officinarum L.) e milho (Zea mays L.), dois hospedeiros preferenciais. Este trabalho relata a ocorrência no Brasil de Tetrastichus howardi (Olliff) (Hymenoptera, Chalcidoidea: Eulophidae) parasitando pupas de D. saccharalis em colmos de plantas de milho. Ele também inclui dados preliminares sobre alguns aspectos biológicos do parasitóide. Uma fêmea de T. howardi foi capaz de produzir até 66 descendentes em uma única pupa do hospedeiro e, aparentemente, não faz distinção entre diferentes idades da pupa. O ciclo de vida do parasitóide foi ao redor de 25,5 dias. A presença do parasitóide no Brasil abre uma nova perspectiva sobre a supressão da broca da cana, considerando os resultados promissores já obtidos em países asiáticos. O inseto é bem adaptado à condição de laboratório, podendo ser produzido em grande número, tornando assim, uma opção adicional para o manejo integrado nas culturas onde D. saccharalis é praga chave...

Parasitism and predation of the planthopper Tagosodes orizicolus (Homoptera: Delphacidae) by a dryinid parasitoid in Costa Rica

Mora-Kepfer,Floria; Espinoza,Ana Mercedes
Fonte: Revista de Biología Tropical Publicador: Revista de Biología Tropical
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/11/2009 EN
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We analyzed the effect of predation and parasitism by the native dryinid Haplogonatopus hernandezae as a natural enemy of the rice pest Tagosodes orizicolus under controlled conditions in an insectary in Costa Rica. We found no change in the proportion of T. orizicolus nymphs that were fed upon, parasitized, and that showed no apparent damage throughout the adult stage in H. hernandezae, which favors a stable control of the pest. The percentage of T. orizicolus nymphs that were parasitized (37 %) and preyed upon (36.5 %) was similar, eliminating 73,5 % of the total nymphs causing damage to the rice plants (N = 1 099). Of the total 324 parasitized nymphs, female nymphs were more parasitized than male nymphs (95 % and 5 % respectively) and dryinids developed more successfully in female host nymphs. These tendencies did not change with dryinid age. Survival of dryinids was higher in female T. orizicolus, both for larvae that emerged from the host and pupated, and for pupae that moulted to adults. In cages where the nymphs had no contact with dryinids we found a higher amount of males than females (57.44 ± 28.5 vs 45.22 ± 25.85). In contrast, when the nymphs were in contact with dryinids, the sex ratio was two females to one male reaching adulthood since the dryinids fed more on male nymphs (N = 692). Our results indicate that female dryinids prefer to oviposit in female T. orizicolus nymphs and prey on males. Reproduction by parthenogenesis...

Musca domestica as a Host for Mass Rearing of Parasitoid Palmistichus elaeisis (Hymenoptera: Eulophidae)

Zaché,Bruno; Zaché Rodrigues da Costa,Ronelza; Candelária,Murici Carlos; Wilcken,Carlos Frederico
Fonte: Agrociencia Uruguay Publicador: Agrociencia Uruguay
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2013 EN
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Musca domestica (Diptera: Muscidae), is a potential mechanical vector of etiological agents such as viruses, bacteria, protozoan cysts and larvae of helminthes. It has shown potential as an alternative host for the mass raising of parasitoids. Studies demonstrate the possibility of producing large quantities of hosts in a small space and a short time. Palmistichus elaeisis (Hymenoptera: Eulophidae) is a potential parasitoid for insects of different orders. This is the first report of P. elaeisis parasitizing pupae of Musca domestica in Brazil