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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.
Detec??o de Wolbachia em uma Popula??o Telítoca de Trichogramma atopovirilia Oatman & Platner (Hymenoptera: Trichogrammatidae) via PCR com o Primer Específico wsp
CIOCIOLA JR., AMéRICO I.;ALEMIDA, RAUL P. DE;ZUCCHI, ROBERTA A.;STOUTHAMER, RICHARD;
Neotropical Entomology , 2001, DOI: 10.1590/S1519-566X2001000300027
Abstract: for the first time in brazil, wolbachia was detected in trichogramma using pcr with the wsp specific primer. a trichogramma atopovirilia oatman & platner population was colected in helicoverpa zea boddie (lepidoptera: noctuidae) eggs at embrapa/sete lagoas. the results showed that the amplification of dna bands, confirms the presence of wolbachia on the analysed population. the presence of this a-proteobacteria will contribute for the correct choice on which population will be used for applied biological control programs against lepidopterous pests.
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.
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.
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.
Side Effects of Fungicides Used in Cucurbitaceous Crop on Trichogrammaatopovirilia Oatman & Platner (Hymenoptera: Trichogramatidae) Efectos Secundarios sobre Trichogramma atopovirilia Oatman & Platner (Hymenoptera: Trichogramatidae) de Fungicidas usados en Cucurbitáceas  [cached]
Dirceu Pratissoli,André M. Milanez,Wagner F. Barbosa,Flávio N. Celestino
Chilean Journal of Agricultural Research , 2010,
Abstract: Trichogramma spp. (Hymenoptera: Trichogrammatidae) can control Diaphania hyalinata Linnaeus (Lepidoptera: Pyralidae). On the other hand, pesticides may reduce the efficiency of natural enemies. The objective was to evaluate the side-effects of fungicides used in the production of cucurbitaceous crops on Trichogramma atopovirilia Oatman & Platner parasitizing D. hyalinata eggs. The fungicides used in bioassays were: azoxystrobin (0.08 g active ingredient [ai] L-1), chlorothalonil (2.00 g ai L-1), mancozeb (1.60 g ai L-1), tebuconazole (0.25 g ai L-1) and thiophanate-methyl (0.49 g ai L-1). Cardboards with 30 D. hyalinata eggs previously immersedin fungicide solutions and distilled water (control) were offered separately to 20 newly emerged T. atopovirilia females in glass tubes. Parasitism, parasitism reduction, emergence, sex ratio, and number of individuals per egg were evaluated. The fungicides chlorothalonil, thiophanate-methyl and tebuconazole reduced parasitism of T. atopovirilia by 43.37, 27.64 and 18.51%, respectively. However, parasitism with azoxystrobin (79.21%) was higher than the control (67.37%) (P ≤ 0.05). Chlorothalonil, thiophanate-methyl and tebuconazole reduced emergence by 73.77, 75.62 and 79.35% (P ≤ 0.05), respectively. Azoxystrobin and thiophanate-methyl reduced the sex ratio by 0.77 and 0.76 (P ≤ 0.05), respectively. Fungicides did not reduce the number of individuals per egg. The fungicides azoxystrobin and mancozeb were selective for T. atopovirilia for most studied parameters suggesting that these products must have the priority in crop disease management to allow efficient biological control of T. atopovirilia against D. hyalinata. Trichogramma spp. (Hymenoptera: Trichogrammatidae) pueden controlar Diaphania hyalinata Linnaeus (Lepidoptera: Pyralidae). Sin embargo, los plaguicidas pueden reducir la eficiencia de los enemigos naturales. El objetivo de este trabajo fue evaluar la influencia de los fungicidas utilizados en la producción de cucurbitáceas en Trichogramma atopovirilia Oatman & Platner sobre huevos de D. hyalinata. Se evaluaron los fungicidas azoxystrobina (0.08 g ingrediente activo [ia] L-1), clorotalonil (2.00 g ia L-1), mancozeb (1.60 g ia L-1), tebuconazole (0.25 g ia L-1) and tiofanato-metil (0.49 g ia L-1). Tarjetas con 30 huevos de D. hyalinata previamente sumergidos en los fungicidas y en agua destilada (control) fueron ofrecidas a 20 hembras de T. atopovirilia con hasta 24 h de emergencia individualizadas en tubos de vidrio. Se evaluó parasitismo, reducción de parasitismo, emergencia, proporción sexual en la
Side Effects of Fungicides Used in Cucurbitaceous Crop on Trichogrammaatopovirilia Oatman & Platner (Hymenoptera: Trichogramatidae)
Pratissoli,Dirceu; Milanez,André M.; Barbosa,Wagner F.; Celestino,Flávio N.; Andrade,Gilberto S.; Polanczyk,Ricardo A.;
Chilean journal of agricultural research , 2010,
Abstract: trichogramma spp. (hymenoptera: trichogrammatidae) can control diaphania hyalinata linnaeus (lepidoptera: pyralidae). on the other hand, pesticides may reduce the efficiency of natural enemies. the objective was to evaluate the side-effects of fungicides used in the production of cucurbitaceous crops on trichogramma atopovirilia oatman & platner parasitizing d. hyalinata eggs. the fungicides used in bioassays were: azoxystrobin (0.08 g active ingredient [ai] l-1), chlorothalonil (2.00 g ai l-1), mancozeb (1.60 g ai l-1), tebuconazole (0.25 g ai l-1) and thiophanate-methyl (0.49 g ai l-1). cardboards with 30 d. hyalinata eggs previously immersedin fungicide solutions and distilled water (control) were offered separately to 20 newly emerged t. atopovirilia females in glass tubes. parasitism, parasitism reduction, emergence, sex ratio, and number of individuals per egg were evaluated. the fungicides chlorothalonil, thiophanate-methyl and tebuconazole reduced parasitism of t. atopovirilia by 43.37, 27.64 and 18.51%, respectively. however, parasitism with azoxystrobin (79.21%) was higher than the control (67.37%) (p ≤ 0.05). chlorothalonil, thiophanate-methyl and tebuconazole reduced emergence by 73.77, 75.62 and 79.35% (p ≤ 0.05), respectively. azoxystrobin and thiophanate-methyl reduced the sex ratio by 0.77 and 0.76 (p ≤ 0.05), respectively. fungicides did not reduce the number of individuals per egg. the fungicides azoxystrobin and mancozeb were selective for t. atopovirilia for most studied parameters suggesting that these products must have the priority in crop disease management to allow efficient biological control of t. atopovirilia against d. hyalinata.
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.
Efeito de beauveria bassiana (bals.) Vuillemin e Metarhizium anisopliae (metsch.) sorokin nos parametros biológicos de trichogramma atopovirilia oatman & platner, 1983 (hymenoptera: trichogrammatidae)
Polanczyk, Ricardo Antonio;Pratissoli, Dirceu;Dalvi, Leandro Pin;Grecco, Eduardo Domingos;Franco, Cláudio Roberto;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000600008
Abstract: two bioassays were performed to evaluate the effect of two biopesticides based on beauveria bassiana (bals.) vuillemin and metarhizium anisopliae (metsch.) sorokin on the biological parameters of trichogramma atopovirilia oatman & platner, 1983. in the first one, displays with s. frugiperda, 1797 eggs were dropped into the biopesticide suspension and offered to the parasitoid females for 24 hours. in the second one, parasitoid females were fed with a suspension containing honey and biopesticide suspension. in both cases, after the parasitoid death they were mantained into a humid chamber to observe fungus sporulation. the experiments were maintained in a climatized chamber at 25±1o c, rh 70± 10%, and photophase of 14 hours. the longevity and adult mortality, total parasitism, progeny emergency, number of individuals per egg and sexual ratio were analyzed. the biopesticides did not affect the evaluated parameters and no fungus sporulation was observed in dead females. it is possible to assert that the entomopathogenic fungi b. bassiana and m. anisopliae can be used with t. atopovirilia in ipm s. frugiperda systems.
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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