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Resposta de Trichogramma atopovirilia Oatman & Platner (Hymenoptera: Trichogrammatidae) a diferentes densidades de ovos do hospedeiro natural, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae)
Paron, Maria J. F. O.;Ciociola, Américo I.;Cruz, Ivan;
Anais da Sociedade Entomológica do Brasil , 1998, DOI: 10.1590/S0301-80591998000300011
Abstract: laboratory (25oc, 70% ur and photoperiod of 12 hours) studies were conducted to evaluate the response of trichogramma atopovirilia oatman & platner female to the increase of its host [helicoverpa zea (boddie)] egg densities. one, three, five and 10 females received, 15, 30, 60, 90, 120 e 150 eggs, for a period of 24 h. results indicated mutual interference of both parasitoid and host, when three or more females were confined inside the vials in low densities of host eggs resulting in a lower number of parasitized eggs/female. with at least 120 host eggs (minimum of 12 eggs available/female) no mutual interference was observed. quadratic responses were verified to the total number of parasitized eggs with the increase of egg density, with five or more parasitoids/vial. percent parasitism did not increase with the increment in egg density.
Quality Control of Trichogramma atopovirilia and Trichogramma pretiosum (Hym.: Trichogrammatidae) adults reared under laboratory conditions
Soares, Marcus Alvarenga;Leite, Germano Le?o Demolin;Zanuncio, José Cola;Sá, Veríssimo Gibran Mendes de;Ferreira, Cleidson Soares;Rocha, Silma Leite;Pires, Evaldo Martins;Serr?o, José Eduardo;
Brazilian Archives of Biology and Technology , 2012, DOI: 10.1590/S1516-89132012000200018
Abstract: the objective of this work was to assess the flight capacity, parasitism and emergence of trichogramma atopoviriliaand two strains of t. pretiosum (hymenoptera: trichogrammatidae) (l1 and l2). the flight capacity of these species was assessed in test units consisting of a plastic pvc cylinder with a rigid transparent plastic circle on the upper part and an extruded polystyrene disk closing its bottom. a tube was placed in each test unit containing a card with 300 anagasta kuehniella (lepidoptera: pyralidae) eggs parasitised by trichogramma. these cards were assessed to determine the parasitism rate and adult emergence of these natural enemies. t. atopovirilia and t. pretiosum l1 presented adequate flight capacity and parasitism, in addition to high percentages of adults emerged.
Seletividade de inseticidas, recomendados para cucurbitáceas para Trichogramma atopovirilia Oatman & Platner (Hymenoptera: Trichogrammatidae) em condi??es de laboratório
Pratissoli, Dirceu;Milanez, André Malacarne;Celestino, Flávio Neves;Barbosa, Wagner Faria;Vianna, Ulysses Rodrigues;Polanczyk, Ricardo Antonio;Zinger, Fernando Domingo;Carvalho, José Romário de;
Revista Ceres , 2011, DOI: 10.1590/S0034-737X2011000500018
Abstract: the cucurbit borers diaphania spp. are major cucurbit pests, causing losses of up to 100% in production. biological control with the parasitoid trichogramma is an alternative for reducing the use of insecticides. the objective of this study was to evaluate the selectivity of the active ingredients abamectin, chlorfenapyr and thiacloprid to trichogramma atopovirilia oatman & platner (hymenoptera: trichogrammatidae). for this purpose, 20 newly emerged females of t. atopovirilla were confined individually in glass tubes (2.5 cm diameter x 8.5 cm in length), with 30 eggs of diaphania hyalinata (linnaeus) (lepidoptera: pyralidae) glued on a small cardboard strip that was previously immersed for five seconds in chemical solution. the active ingredients abamectin, chlorfenapyr and thiacloprid did not affect the t. atopovirilia parasitism. however, chlorfenapyr reduced larval emergence. abamectin and thiacloprid can be therefore recommended for the integrated pest management, as they proved to be the most selective to t. atopovirilia in d. hyalinata eggs.
Potencial biológico de Trichogramma atopovirilia (hymenoptera: trichogrammatidae) como parasitoide de la polilla de los granos
Morales,José; Vásquez,Carlos; Gallardo,José; Gutiérrez,Franklin; Ríos,Yolmar; Pérez,Nieves;
Bioagro , 2004,
Abstract: se estudió bajo condiciones de laboratorio el potencial biológico de la avispita parasitoide, trichogramma atopovirilia oatman y platner. huevos de 0-24 horas de edad de la polilla de los granos, sitotroga cerealella (olivier), utilizados como hospedero, fueron expuestos en viales de vidrio a una hembra del parasitoide durante su vida. el patrón de emergencia de los adultos indicó que los parasitoides produjeron la más alta progenie el día 1 de parasitismo (33,0 a 58,3 %). para el día 4 la emergencia acumulada varió de 69,5 a 91,0 %. en los días subsiguientes la emergencia fue poca o nula. el tiempo promedio de desarrollo del parasitoide (huevo-adulto) fue de 9,5 días. la longevidad promedio de las hembras de t. atopovirilia fluctuó desde 3,8 hasta 7,1 días a las diferentes densidades de huevos del hospedero. la proporción sexual de la progenie (macho: hembra) mostró predominio de las hembras con un rango de 1:1,0 a 1:4,2.
Potencial biológico de Trichogramma atopovirilia (hymenoptera: trichogrammatidae) como parasitoide de la polilla de los granos
José Morales,Carlos Vásquez,José Gallardo,Franklin Gutiérrez
Bioagro , 2004,
Abstract: Se estudió bajo condiciones de laboratorio el potencial biológico de la avispita parasitoide, Trichogramma atopovirilia Oatman y Platner. Huevos de 0-24 horas de edad de la polilla de los granos, Sitotroga cerealella (Olivier), utilizados como hospedero, fueron expuestos en viales de vidrio a una hembra del parasitoide durante su vida. El patrón de emergencia de los adultos indicó que los parasitoides produjeron la más alta progenie el día 1 de parasitismo (33,0 a 58,3 %). Para el día 4 la emergencia acumulada varió de 69,5 a 91,0 %. En los días subsiguientes la emergencia fue poca o nula. El tiempo promedio de desarrollo del parasitoide (huevo-adulto) fue de 9,5 días. La longevidad promedio de las hembras de T. atopovirilia fluctuó desde 3,8 hasta 7,1 días a las diferentes densidades de huevos del hospedero. La proporción sexual de la progenie (macho: hembra) mostró predominio de las hembras con un rango de 1:1,0 a 1:4,2.
Toxicidade de agrotóxicos utilizados na cultura do pessegueiro sobre o parasitóide de ovos Trichogramma atopovirilia Oatman & Platner, 1983 (Hymenoptera: Trichogrammatidae)
Giolo, Fabrizio Pinheiro;Grützmacher, Anderson Dionei;Manzoni, Cristiane Gindri;H?rter, Wagner da Roza;Castilhos, Rodolfo Vargas;Müller, Cristiane;
Ciência Rural , 2007, DOI: 10.1590/S0103-84782007000200003
Abstract: the toxicity of sixteen commercial formulations of pesticides used in peach production was assessed in the laboratory (25±1oc temperature, 70±10% relative humidity and 14h photophase) on adults of egg parasitoids trichogramma atopovirilia oatman & platner, 1983 (hymenoptera: trichogrammatidae) by exposing the adult parasitoids to fresh dry pesticide film applied on glass plates and further evaluation of the capacity of parasitism per adult female. the reduction in capacity of parasitism compared with the control (treated with water) was used to measure the effect of the chemical. pesticides were then classified into four categories, according to the reduction in parasitization: 1, harmless (<30%); 2, slightly harmful (30-79%); 3, moderately harmful (80-99%); 4, harmful (>99%). the pesticides (% commercial formulation in spray water) captan 500 pm (0.240), cobre sandoz br (0.240), delan (0.125), dodex 450 sc (0.175), rovral sc (0.150) and intrepid 240 sc (0.060) were harmless; manzate 800 (0.200) was slightly harmful; assist (2.000), finale (1.000) and roundup (original) (3.000) were moderately harmful; kumulus df (0.600), hokko cihexatim 500 (0.050), vertimec 18 ce (0.080), imidan 500 wp (0.200), tiomet 400 ce (0.120) and trebon 100 sc (0.150) were harmful to t. atopovirilia.
Behavior of Trichogramma atopovirilia Oatman & Platner and T. pretiosum Riley (Hymenoptera: Trichogrammatidae) on Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) egg masses
Beserra, E. B;Dias, C. T.;Parra, J. R. P.;
Brazilian Journal of Biology , 2005, DOI: 10.1590/S1519-69842005000100003
Abstract: in this study we analyzed the impact of physical barriers of spodoptera frugiperda (j. e. smith) egg-masses on the behavior of trichogramma atopovirilia oatman & platner and trichogramma pretiosum riley. the duration of drumming, drilling, oviposition, period spent over the egg-mass, and interval between parasitized eggs were timed, and the number of parasitized eggs were recorded. the presence of scales on the egg-masses caused a significant increase in the time spent by both parasitoids on each process and a decrease in the residence time over the egg-mass and in the number of parasitized eggs, with an increase in the number of egg layers. there was a significant decrease in the number of parasitized eggs in relation to egg-masses with one layer and no scales. we observed that the physical barriers in fall armyworm egg-masses changed the behavior of t. atopovirilia and t. pretiosum, affecting their parasitization capacity.
Biologia e parasitismo de Trichogramma atopovirilia Oatman & Platner e Trichogramma pretiosum Riley (Hymenoptera, Trichogrammatidae) em ovos de Spodoptera frugiperda (J.E. Smith) (Lepidoptera, Noctuidae)
Beserra, Eduardo B.;Parra, José Roberto P.;
Revista Brasileira de Entomologia , 2004, DOI: 10.1590/S0085-56262004000100020
Abstract: the parasitism capacity and development of trichogramma atopovirilia oatman & platner and trichogramma pretiosum riley were studied in order to select the most suitable species to control spodoptera frugiperda (j. e. smith). the experiments were conducted under laboratory conditions at 25±2oc, 70±10% rh and 14l:10d photoperiod. both t. atopovirilia and t. pretiosum showed good development and adaptation to s. frugiperda eggs even after being reared for several generations in eggs of anagasta kuehniella zeller. however, t. atopovirilia females were more aggressive and showed higher specificity to the pest, with a higher parasitism capacity in eggs laid with different physical barriers and were more accepted by the natural host in comparison with a. kuehniella. because of the higher parasitism rate and specificity of t. atopovirilia to the pest's egg this species should be given preference to control s. frugiperda.
Seletividade de Lecanicillium lecanii (Zimm.) Zare & W. Gams (classe-forma: Hyphomycetes) ao parasitóide Trichogramma atopovirilia Oatman & Platner, 1983 (Hymenoptera: Trichogrammatidae)
Dalvi, Leandro Pin;Polanczyk, Ricardo Ant?nio;Pratissoli, Dirceu;Melo, Ricardo Lopes de;Holtz, Anderson Mathias;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000500018
Abstract: the present work studied the biological characteristics of trichogramma atopovirilia in eggs of spodoptera frugiperda under influence of the fungus lecanicillium lecanii, with the aim of verifing in laboratory if this entomopathogenic fungus is selective to the parasitoid. the studies were carried out in the entomology sector of nucleus of scientific & technological development in phytossanitary management (nudemafi). the indicatives of selectivity adapted used were: number of parasited eggs, emergency percentage (viability), number of individuals for egg, sex ratio and longevity of the females that parasited. none of these parameters were affected by the fungus, leading to the conclusion that the same is selective to t. atopovirilia, possibiliting the simultaneous utilization of both agents of biological control into the integrated management of pests.
Biologia e exigências térmicas de Trichogramma atopovirilia Oatman & Platner (Hymenoptera: Trichogrammatidae) em ovos de Diaphania hyalinata L. (Lepidoptera: Pyralidae)
Melo, Ricardo L.;Pratissoli, Dirceu;Polanczyk, Ricardo A.;Melo, Débora F.;Barros, Reginaldo;Milanez, André M.;
Neotropical Entomology , 2007, DOI: 10.1590/S1519-566X2007000300011
Abstract: the development and parasitism of diaphania hyalinata l. eggs by trichogramma atopovirilia oatman & platner and its thermal requirements were studied at the temperatures of 18, 21, 24, 27, 30 and 33°c. thirty eggs of d. hyalinata were exposed to three females of t. atopovirilia for 5h at 25°c and incubated at the different temperatures. the developmental time from egg exposure to adult, parasitism viability, number of adults per parasitized host egg and progeny sex ratio were monitored. the developmental time from egg to adult emergence of the parasitoid exhibited inverse relationship to the temperature, lasting 24.12 days at 18°c and 7.36 days at 33°c. parasitism viability at 24, 27 and 30°c was higher than 90%. the ratio of t. atapovirilia adult produced per egg and its sex ratio were not affected when using d. hialynata as host. the lowest threshold temperature (tb) and estimated degree-days over tb required by t. atopovirilia to develop on eggs of d. hyalinata was 11.99°c and 130.42oc, respectively. considering the temperature regimes of two areas where cucurbitaces are cultivated in bahia state (rio real and inhambupe county) it was estimated that t. atopovirilia can achieve more than 32 generation per year. the results suggest that t. atopovirilia has potential to control d. hyalinata eggs with better chance of success under temperature regimes ranging from 24 to 27°c that meets the suitable field conditions for cropping cucurbitaces.
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