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Search Results: 1 - 10 of 706 matches for " Dirceu; Polanczyk "
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Selección de especies de Trichogramma sp. (Hymenoptera: Trichogrammatidae) criadas en los huevos de Anagasta kuehniella (Lepidoptera: Pyralidae)
Lisboa Meira,Ariana; Pratissoli,Dirceu; Polanczyk,Ricardo; Madgan,Leonardo;
Idesia (Arica) , 2012, DOI: 10.4067/S0718-34292012000100012
Abstract: trichogramma species are natural egg parasites of various species of lepidoptera. however, different species of parasitoid prefer different hosts. therefore, to achieve success in the biological control program using trichogramma, it is necessary to study the species most related to the alternative host. four species of trichogramma were investigated: trichogramma acacioi brun, moraes & soares, trichogramma atopovirilia & platner oatman, trichogramma exiguum pinto & platner and trichogramma pretiosum riley (hymenoptera: trichogrammatidae). three indicators were studied: parasitism within a 24 h period, daily parasitism rate during the adult stage and the fertility life table of the host anagasta kuehniella (zeller) (lepidoptera: pyralidae). t. acacioi and t. pretiosum showed the highest daily parasitism rate during the adult stage and the greatest effect on the fertility life table, while the species with best performance was t. exiguum. thus parasitism within 24-h period and host fertility life table were the most efficient systems of selection of species, but with limitations compared to daily adult parasitism rate.
Nonato de Oliveira,Harley; Pratissoli,Dirceu; Colombi,Carlos Alexandre; Polanczyk,Ricardo Antonio; Pin Dalvi,Leandro;
Idesia (Arica) , 2007, DOI: 10.4067/S0718-34292007000100008
Abstract: trichogramma it is one the most important natural enemies and has been successfully utilized for biological control of several pests world-wide. the objective was to construct a life table of trichogramma exiguum in different generations, when reared on eggs of anagasta kuehniella and sitotroga cerealella. the research was development at 25 ± 1°c, 70 ± 10% relative humidity and 14 hours of photophase and were evaluated the duration of a generation (t), liquid reproductive rate (ro), infinitesimal rate of increase (rm) and finite rate of increase (λ). the results showed that t. exiguum were more efficient in eggs of a. kuehniella, showing to be these insect the most indicated to establish a massal rearing.
Rodrigues Vianna,Ulysses; Suemi Saito,Nathália; Mathias Holtz,Anderson; Pratissoli,Dirceu; Antonio Polanczyk,Ricardo;
Idesia (Arica) , 2006, DOI: 10.4067/S0718-34292006000300008
Abstract: defoliator caterpillar cause damages in eucalyptus plantations. a control alternative is the use of trichogramma which, even though has been found parasitizing some species in eucaliptus, does not meet cases of t. arnobia parasitism. the objective of this research was to evaluate the parasitism of trichogramma pratissolii querino & zucchi (hymenoptera: trichogrammatidae) on unviable t. arnobia eggs. unviable t. arnobia eggs were glued on light blue cardboard rectangles, and exposed to the parasitism of t. pratissolii for 24 hours. after this period there was observed 100% mortality of the individuals, though the glued eggs did not present parasitism.
Pin Dalvi,Leandro; Pratissoli,Dirceu; Polanczyk,Ricardo Antonio; Santos Andrade,Gilberto;
Idesia (Arica) , 2008, DOI: 10.4067/S0718-34292008000300011
Abstract: the objective of this work was to verify the occurrence of parasitoids insects, of the coffee berry borer, hypothenemus hampei (ferrari) (coleoptera: scolytidae) in plantings of coffee in the south of espírito santo state. the found parasitoids were prorops nasuta (hym.: bethilidae) and cephalonomia stephanoderis (hym.: bethilidae), with levels of parasitism of up to 33%. these natural enemies’ presence suggests a potential of natural regulation of h. hampei, and perspectives for its use in programs of integrated pest management.
Dias de Almeida,Gustavo; Pratissoli,Dirceu; Polanczyk,Ricardo Ant?nio; Mathias Holtz,Anderson; Vicentini,Victor Bernardo;
Idesia (Arica) , 2007, DOI: 10.4067/S0718-34292007000200009
Abstract: the cabbage aphid is one of the main curses of brássicas in general, and the search for healthier foods has been stimulating the development of techniques inside of the maintainable handling, as the microbial control. the objective of this work was determine concentrations of the microbial b. bassiana for the handling of the cabbage aphid. nymphs of b. brassicae were inoculated in submerged cabbage leaves in fungic suspensions , of the commercial product boveril?, in the concentrations of 0.05, 0.08, 0.12, 0.31, 0.50, 1.0, 1.5, 2.0 grams per liter of distilled water plus adhesive espalhante hai-teem?, and maintained 26.0 ± 1.0°c and ur of 75.0 ± 5%. there was an increment of the mortality in function of the increase of the concentration, because, to smallest concentration (0.05g/l) it presented reduced effect of control 14% of confirmed mortality. however, the concentrations of 1.0-2.0g/l of water provided a superior mortality of 85%. the value found for cl50 was of 0.233g/l. in that way the microbial control of the cabbage aphid can be economical and biologically viable for the handling of this pest in brássicas cultivations.
Ocorrência de Ascia monuste orseis (Lepidoptera: Pieridae) danificando mudas de Crataeva tapia
Pratissoli, Dirceu;Polanczyk, Ricardo Antonio;Dalvi, Leandro Pin;Cocheto, Julieder Goronci;Melo, Debora Ferreira;
Ciência Rural , 2007, DOI: 10.1590/S0103-84782007000300042
Abstract: this research is aimed at comunicating the occurrence of cabbage caterpillar ascia monuste orseis (godart) (lepidoptera: pieridae), causing damage to crataeva tapia (l.) ("tapiá"). it was verified 100% of desfoliation indicating that these larvae caused severe damaged to "tapiá". besides this, they consumed epidermis causing death of all seedlings.
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.
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.
Avalia??o de Trichogramma spp. para o controle de Trichoplusia ni
Milanez, André Malacarne;Pratissoli, Dirceu;Polanczyk, Ricardo Antonio;Bueno, Adeney de Freitas;Tufik, Camila Borges Antonio;
Pesquisa Agropecuária Brasileira , 2009, DOI: 10.1590/S0100-204X2009001000002
Abstract: the objective of this study was to evaluate the biological characteristics of the parasitoids trichogramma acacioi, t. atopovirilia, t. marandobai, t. demoraesi, t. exiguum (two lines), and t. pretiosum (six lines), reared on eggs of trichoplusia ni. the experiment was carried out in a completely randomized design, with 15 replicates. the biological characteristics evaluated were: parasitism, viability, sexual ratio and number of individuals per egg. the parasitism percentage varied between 7.66 and 53%, whith highest value observed for trichogramma pretiosum tspd line, and the lowest for the t. pretiosum trecife line. there was no significant difference for the viability, which remained higher than 85%. the sex ratio varied from 0.75 to 1, and tspd line showed the lowest value. the number of individuals per egg varied between 2.39 for t. marandobai (tm1 line) and 1.34 for t. exiguum (te1 line). t. pretiosum (tspd line) was the species with the best performance in laboratory with the highest values observed in parasitism and in viability.
Efeito da idade de Trichogramma exiguum e do desenvolvimento embrionário da Tra a-das-Crucíferas sobre as características biológicas do parasitóide = Effect of the age of Trichogramma exiguum and diamondback moth embryonic development on the biological characteristics of the parasitoid
Ricardo Antonio Polanczyk,Dirceu Pratissoli,Anderson Mathias Holtz,Cácia Leila Tigre Pereira
Acta Scientiarum : Biological Sciences , 2007,
Abstract: Este trabalho teve como objetivo avaliar a influência do desenvolvimento embrionário dos ovos do hospedeiro P. xylostella sobre fêmeas de Trichogramma exiguum, com diferentes idades. Para tanto, cinqüenta fêmeas recém-emergidas ou com 24, 48, 72, e 96horas após a emergência deste parasitóide foram divididas em cinco lotes. Para cada fêmea, foi oferecida uma cartela, contendo 30 ovos de P. xylostella com um, dois e três dias de idade. As maiores taxas de parasitismo foram observadas em ovos de três dias de desenvolvimento embrionário, independente da idade do parasitóide, com exce o daqueles com 72 horas de idade. A viabilidade n o foi influenciada pela idade do parasitóide e nem pela fase embrionária do hospedeiro. A raz o sexual foi semelhante nas três fases embrionárias do hospedeiro para fêmeas de T. exiguum com 24, 48 e 72 horas de idade. Ao avaliar os descendentes do parasitóide provenientes de ovos com três, dois e um dia de desenvolvimento embrionário, verificou-se que os maiores valores de longevidade foram obtidos quando foram usadas fêmeas recém-emergidas ou com 48 e 72 horas de vida,respectivamente. Estes resultados indicam a importancia da idade do parasitóide, bem como o período de desenvolvimento embrionário do hospedeiro para manter a qualidade de T. exiguum em laboratório, em uma cria o massal, e também nas libera es de campo para o controle biológico de pragas. The objective of this work was to evaluate the influence of the embryonic development of eggs from the P. xylostella host on Trichogramma exiguum females of different ages. Fifty females – either just-emerged or 24, 48, 72 and 96 hours after emergence of this parasitoid were divided into five groups. Each female was offered a recipient with 30 P. xylostella eggs, which were 1-, 2- and 3-days-old. The greatest rates of parasitism were observed on eggs with 3 days of embryonic development, with exception of those 72-hours-old. Viability was not influenced by parasitoid age or host embryonic stage. Sex ratio was similar in all three embryonic host stages for T. exiguum females that were 24-, 48- and 72-hours-old. While evaluating parasitoid progeny obtained from eggs with 3, 2 and 1 days of embryonic development, it was verified that the highest values of longevity were obtained when the females used were just-emerged, or 48- and 72-hours-old, respectively. These resultsindicate the importance of the age of the parasitoid, as well as the host embryonic development period, in order to maintain quality of T. exiguum at laboratory conditions, in mass culture, as well as in field rel
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